# Boeing Alert Service Bulletin 767-53A0193: Revision 3, part 1 of 2 - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2025-1719; AD 2026-05-03 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Alert Service Bulletin 767-53A0193](https://openairdocs.org/service-documents/boeing/767-53a0193.md) - Title as filed: SB 767-53A0193 R3-_Part1 - Pages: 246 - PDF: https://openairdocs.org/files/sha256/c1/08/c108a33e7101c044d9ec76cc0723e13d801e7bbf3b7eab005282213bf2abd0f4 - Page: https://openairdocs.org/service-documents/boeing/767-53a0193/file/c108a33e7101 ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Commercial Airplanes 767 Service Bulletin ALERT Number: 767-53A0193 Original Issue: November 25, 2008 Revision 3: June 27, 2024 ATA System: 5330 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR. 9E991ECCN: BOEING PROPRIETARY Copyright © 2024 The Boeing Company Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing. Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 1 of 348 3.0 ### Page 2 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 2 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT BLANK PAGE ### Page 3 Table of Contents Revision Transmittal Sheet ............................................ 7 S u m m a r y ...................................................... 9 1. PLANNING INFORMATION ........................................ 1 3 A . E f f e c t i v i t y ............................................... 1 3 1. Airplanes ............................................ 1 3 2 . S p a r e s A f f e c t e d ........................................ 1 6 B. Concurrent Requirements ...................................... 1 6 C. Reason ................................................ 1 6 D. Description .............................................. 1 9 E. Compliance .............................................. 2 1 F . A p p r o v a l ............................................... 7 9 G. Manpower .............................................. 8 0 H. Weight and Balance Changes .................................... 8 8 I. Electrical Load Data ......................................... 8 8 J . R e f e r e n c e s .............................................. 8 8 1. Existing Data: ......................................... 8 8 2. Data Supplied with this Service Bulletin: ........................... 8 8 3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 8 8 K. Publications Affected ........................................ 8 8 L. Interchangeability and Intermixability of Parts ........................... 8 9 M. Software Accomplishment Summary ................................ 8 9 2. MATERIAL INFORMATION ........................................ 9 1 A. Material - Price and Availability ................................... 9 1 B. Industry Support Information .................................... 9 1 C. Parts Necessary for Each Airplane ................................. 9 1 1 . K i t s / P a r t s : ........................................... 9 1 2. Parts and Materials Supplied by the Operator: ........................ 9 1 3. Parts Modified and Reidentified: ............................... 9 2 4. Parts Removed and Not Replaced: .............................. 9 2 D. Parts Necessary to Change Spares ................................. 9 2 E. Special Tooling - Price and Availability ............................... 9 2 F. Special Tooling Necessary to do this Service Bulletin ....................... 9 2 3. ACCOMPLISHMENT INSTRUCTIONS .................................. 9 5 A. GENERAL INFORMATION ..................................... 9 5 B. WORK INSTRUCTIONS ....................................... 9 6 FIGURE 1: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 1] ............ 1 1 6 FIGURE 2: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 2] ............ 1 1 9 FIGURE 3: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 3] ............ 1 2 2 FIGURE 4: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 4] ............ 1 2 5 FIGURE 5: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 5] ............ 1 2 8 FIGURE 6: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 6] ............ 1 3 0 FIGURE 7: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 7] ............ 1 3 2 FIGURE 8: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 8] ............ 1 3 4 FIGURE 9: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 9] ............ 1 3 6 FIGURE 10: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 10] ........... 1 3 8 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 3 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 4 FIGURE 11: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 11] ........... 1 4 0 FIGURE 12: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 12] ........... 1 4 2 FIGURE 13: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 1] ............ 1 4 4 FIGURE 14: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 2] ............ 1 4 6 FIGURE 15: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 3] ............ 1 4 8 FIGURE 16: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 4] ............ 1 5 0 FIGURE 17: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 5] ............ 1 5 2 FIGURE 18: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 6] ............ 1 5 4 FIGURE 19: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 7] ............ 1 5 6 FIGURE 20: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 8] ............ 1 5 8 FIGURE 21: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 9] ............ 1 6 1 FIGURE 22: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 10] ........... 1 6 4 FIGURE 23: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 11] ........... 1 6 7 FIGURE 24: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 12] ........... 1 6 9 FIGURE 25: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 1] ............ 1 7 2 FIGURE 26: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 2] ............ 1 7 4 FIGURE 27: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 3] ............ 1 7 6 FIGURE 28: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 4] ............ 1 7 8 FIGURE 29: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 5] ............ 1 8 0 FIGURE 30: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 6] ............ 1 8 3 FIGURE 31: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 7] ............ 1 8 6 FIGURE 32: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 8] ............ 1 8 9 FIGURE 33: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 9] ............ 1 9 2 FIGURE 34: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 10] ........... 1 9 5 FIGURE 35: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 11] ........... 1 9 8 FIGURE 36: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 12] ........... 2 0 1 FIGURE 37: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 1] . . 204 FIGURE 38: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 2] . . 206 FIGURE 39: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 3] . . 208 FIGURE 40: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 4] . . 210 FIGURE 41: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 5] . . 212 FIGURE 42: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 6] . . 214 FIGURE 43: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 7] . . 216 FIGURE 44: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 8] . . 218 FIGURE 45: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 9] . . 220 FIGURE 46: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 10] . 222 FIGURE 47: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 11] . 224 FIGURE 48: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 12] . 226 FIGURE 49: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 1] ........ 2 2 8 FIGURE 50: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 2] ........ 2 3 1 FIGURE 51: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 3] ........ 2 3 4 FIGURE 52: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 4] ........ 2 3 7 FIGURE 53: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 5] ........ 2 4 0 FIGURE 54: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 6] ........ 2 4 3 FIGURE 55: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 7] ........ 2 4 6 FIGURE 56: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 8] ........ 2 4 9 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 4 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 5 FIGURE 57: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 9] ........ 2 5 2 FIGURE 58: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 10] ....... 2 5 5 FIGURE 59: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 11] ....... 2 5 8 FIGURE 60: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 12] ....... 2 6 0 FIGURE 61: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 1] ................. 2 6 2 FIGURE 62: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 2] ................. 2 6 4 FIGURE 63: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 3] ................. 2 6 6 FIGURE 64: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 4] ................. 2 6 8 FIGURE 65: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 5] ................. 2 7 0 FIGURE 66: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 6] ................. 2 7 2 FIGURE 67: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 7] ................. 2 7 4 FIGURE 68: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 8] ................. 2 7 6 FIGURE 69: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 9] ................. 2 7 8 FIGURE 70: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 10] ................ 2 8 0 FIGURE 71: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 11] ................ 2 8 2 FIGURE 72: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 12] ................ 2 8 4 FIGURE 73: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 13] ........... 2 8 6 FIGURE 74: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 13] ........... 2 8 9 FIGURE 75: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 13] ........... 2 9 1 FIGURE 76: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 14] ........... 2 9 3 FIGURE 77: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 14] ........... 2 9 5 FIGURE 78: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 14] ........... 2 9 7 FIGURE 79: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 13] . 300 FIGURE 80: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION [Group 14-15] . 302 FIGURE 81: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 13] ....... 3 0 4 FIGURE 82: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION [Group 14-15] ...... 3 0 7 FIGURE 83: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 13] ................ 3 1 0 FIGURE 84: FUSELAGE - DECALS - ZONE 3 INSPECTION [Group 14-15] .............. 3 1 2 FIGURE 85: FUSELAGE - SKIN LAP JOINTS, EXTERNAL APPROVED REPAIRS, AND EXTERNAL FEATURES - NON-DESTRUCTIVE TESTING INSPECTIONS [Group 1-12] ....... 3 1 4 FIGURE 86: FUSELAGE - SKIN LAP JOINTS, EXTERNAL APPROVED REPAIRS, AND EXTERNAL FEATURES - NON-DESTRUCTIVE TESTING INSPECTIONS [Group 13] ........ 3 1 7 FIGURE 87: FUSELAGE - SKIN LAP JOINTS, EXTERNAL APPROVED REPAIRS, AND EXTERNAL FEATURES - NON-DESTRUCTIVE TESTING INSPECTIONS [Group 14] ........ 3 2 2 FIGURE 88: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION [Group 15] ........... 3 2 7 FIGURE 89: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION [Group 15] ........... 3 2 9 FIGURE 90: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION [Group 15] ........... 3 3 1 Appendix A: SEALAN T REMOVAL PROCEDURE FOR EXTERIOR PRESSURIZED FUSELAGE SKIN . 334 Appendix B: REPORTING SYSTEM - AIRPLANES WITH SCRIBE LINES ............... 3 4 2 Appendix C: AIRPLANE FUSELAGE SCRIBE LINE SUMMARY TABLES ................ 3 4 5 Appendix D: SCRIBE LINE SAMPLE .................................... 3 4 7 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 5 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 6 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 6 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT BLANK PAGE ### Page 7 Commercial Airplanes 767 Service Bulletin ALERT Revision Transmittal SheetNumber: 767-53A0193Original Issue: November 25, 2008 Revision 3: June 27, 2024 ATA System: 5330 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines This revision includes all pages of the service bulletin. COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-06-16 is related to this service bulletin. The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin revision mandatory. Effects of this Revision on airplanes on which the Original Issue, Revision 1 or Revision 2 was previously done: See Paragraph 1.D., Description for more information. Airplanes VN196 and VN197 were moved from Group 14 to new Group 15 of this service bulletin effectivity. REASON FOR REVISION This revision is sent to adjust inspection intervals that were reduced in Revision 2 and to move inspections from areas where the lower skins were replaced during passenger to freighter conversion for 767-300BCF airplanes in Group 13 and Group 14. Group 15 was created for clarity only, these airplanes are not affected by the changes in this revision. These sections were changed: 1. In Service Bulletin Header, changed Air Transport Association (ATA) System number. 2. In Summary Background, added information about Boeing Converted Freighter (BCF) airplanes, added Boeing Service Related Problem (SRP) and Boeing Fleet Team Digest (FTD) references, and added summary evaluation table. 3. In Summary, Compliance, added AD information. 4. In Paragraph 1.A.1., Airplanes, moved airplanes to new group and changed configuration descriptions. Added Production Revision Record (PRR) information. 5. In Paragraph 1.C., Reason, added information and Revision 3 statement. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 7 of 348 ### Page 8 6. In Paragraph 1.D., Description, added Revision 3 statement and maintenance zones information. 7. In Paragraph 1.E., Compliance, changed applicability, changed and added compliance information. Added AD information. 8. In Paragraph 1.F., Approval, changed the approval statement and Alternative Method of Compliance (AMOC) information. 9. In Paragraph 1.G., Manpower, changed and added information. 10. In Paragraph 1.J.1., Existing Data, added PRR, Boeing Fleet Team Digest (FTD) and Boeing Service Related Problem (SRP) references. 11. In Paragraph 1.M., Software Accomplishment Summary, added information. 12. In Paragraph 2.C.2.,Parts and Materials Supplied by the Operator, added parts and notes. 13. In Paragraph 3.A., General Information, removed general note 17. 14. Figure 73 through Figure 78, changed illustration and step table. 15. Figure 80, Figure 82 and Figure 84 changed applicability. 16. Figure 87, Added information. 17. Figure 88 through Figure 90, added for new Group 15. 18. Appendix A, Added AMS reference, removed BMS reference. The data given in Alternative Method of Compliance Notice 767-53A0193-AMOC-01, 767-53A0193-AMOC-02 and 767-53A0193-AMOC-03 are included in this revision. The data given in Information Notice 767-53A0193 IN 01 is included in this revision. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes. Pages with no vertical lines have no changes. REVISION HISTORY November 25, 2008Original Issue: April 09, 2009Revision 1: August 26, 2010Revision 2: June 27, 2024Revision 3: Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 8 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 9 Commercial Airplanes 767 Service Bulletin ALERT SummaryNumber: 767-53A0193Original Issue: November 25, 2008 Revision 3: June 27, 2024 ATA System: 5330 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. CONCURRENT REQUIREMENTS None. BACKGROUND This service bulletin gives instructions to inspect for scribe lines in the fuselage skin at skin lap joints, the skin at certain external approved repairs, the skin around external features such as antennas, and the skin at decals. Fatigue cracks can develop at scribe line locations. Any crack that remains undetected could grow large and cause a rapid decompression. Thirteen (13) 767 airplanes have been found with scribe line damage by 11 operators. Scribe lines were found at skin lap joints, butt joints, around external repairs and antennas, and at locations where decals were cut. Many of the scribe lines appear to have been made when sealant was removed as part of preparation of the airplane for repainting. The airplanes had between 6300 flight cycles and 24,600 flight cycles. No cracks as a result of scribe lines on 767 airplanes have been reported to Boeing. Since the original issue date on this service bulletin, an additional twenty four (24) 767 airplanes have been reported with scribe line damage. A scribe line is a narrow, shallow, distinct line of damage (typically up to 0.006 inch deep), usually associated with the removal of a fillet or gap seal (lap joints and butt joints, respectively). A more detailed definition of a scribe line is included in Accomplishment Instructions Paragraph 3.B. - Identification of a "Typical" Scribe Line. A review of fleet activity yields two separate scenarios that are suspected to have caused scribe lines to the fuselage skin. The first scenario involves the paint stripping and repainting of airplanes. In the process of stripping and preparing the airplane for paint, tools were used to remove sealant and paint buildup at lap joints, at certain external approved repair doublers or door scuff plates, or around external features. Tools like scrapers (steel, wood, hard plastic etc.), knives, or utility knives can damage the skin. Fatigue cracks can develop at scribe line locations. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 9 of 348 ### Page 10 The second scenario is decal application on/or removal from the fuselage. To install the decals across lap joint steps or repairs, investigation into maintenance practices has shown that decals have been cut in place, using some form of knife, to allow the decal to lie flush to the skin at these stepped locations. This operation results in scribe lines at the decal cut location. Based on service reports, sharp tools have also been used for close trimming of the decals outline. This type of decal trimming has also left scribe lines on the fuselage skin. The above maintenance operations can each lead to the same type of scribe line damage and subsequent premature fatigue cracks. The freighter modifications done to Group 13 and Group 14 airplanes have multiple modified lap splices locations, as well as additional external doublers, skin replacements and door cutouts in Section 43. The addition of these modifications prevent the ability for Group 13 and Group 14 operators to do the Airworthiness Directive (AD) mandated inspections as given in Service Bulletin (SB) 767-53A0193 Revision 1. The modified parts could hide pre-existing scribe lines that if undetected, could turn into undetected cracks in the fuselage skin. All other Boeing Converted Freighter (BCF) airplanes are required to have areas affected by the freighter modification inspected before conversion and all remaining areas of these airplanes are addressed under the passenger configuration group as shown in the effectivity table. Boeing Service Related Problem (SRP) 767-SRP-53-0244 and 767-SRP-53-0672 are related to this service bulletin. Boeing Fleet Team Digest (FTD) 767-FTD-53-06001 and 767-FTD-53-23001 are related to this service bulletin. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information. ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph 1.F., Approval YesAD Related Paragraph 1.F., ApprovalYesAlternative Method of Compliance (AMOC) Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Air- plane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 10 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 11 ACTION (PRR B12901-135RS) At or before the scribe line inspection thresholds shown in this service bulletin, remove paint and sealant at the applicable locations. Do a detailed inspection of the fuselage skin at applicable skin lap joints, external approved repairs, external features, and decals for any scribe line or any crack. If any crack is found, contact Boeing for repair instructions and do the repair. When scribe lines are found, they shall be repaired before further flight. As an alternative to immediate repair, for a scribe line that qualifies, the provided Limited Return To Service (LRTS) program may be used to allow airplanes to return to revenue flight for a limited period before scribe lines are repaired. This service bulletin contains a LRTS program. The LRTS program consists of repeat inspections to detect any crack where scribe lines were found. Total airplane flight cycles, location, and extent of scribe line must meet specific criteria in order for a scribe line to qualify for a LRTS program. Each affected structural location within a LRTS program will be terminated with a repair. This service bulletin has specific instructions for calculating separate inspection thresholds based on fatigue life for the identified locations. With the use of maintenance records, operators can implement the inspection program based on potential scribe line opportunities in an airplane's maintenance history. If this maintenance records-based threshold program is not used, then 6,000 flight cycles shall be assigned as the cycle level when potential scribing first occurred. Since a scribe line can occur at any time during the service life of an airplane and at many locations, this program uses both total flight cycles and structural criticality of location to determine the inspection requirements. Criticality of location allows this service bulletin to address the most critical areas first and to provide less critical areas with appropriately reduced compliance requirements. Criticality of location determines the inspection thresholds for each location. This service bulletin uses figures and compliance times to address all of the critical locations and ranges of inspection thresholds. Each critical piece of structure susceptible to a scribe line is assigned to a figure. The affected structure for each group of airplanes is identified in individual figures in this service bulletin. EFFECTIVITY 767-200, -300, -300F, and -400ER Airplanes. Refer to Paragraph 1.A.1., Airplanes for the list of affected airplanes. COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-06-16, is related to this service bulletin. The effective date of AD 2010-06-16 is April 21, 2010. The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin revision mandatory. Refer to Paragraph 1.E., Compliance. INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspections or repair procedures given in this service bulletin. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 11 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 12 (OCR) BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT MANPOWER Airplanes Total Task Hours Elapsed Hours 767-200, 767-300, 767-300F, and 767-400ER 340.0 50.0 MATERIAL INFORMATION Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability. DO A DETAILED INSPECTION FOR ANY SCRIBE LINE ALONG SKIN LAP JOINTS, EXTERNAL FEATURES, EXTERNAL APPROVEL REPAIRS AND DECALS. IF A SCRIBE LINE IS FOUND, DO A 1560615 NON-DESTRUCTIVE TESTING (NDT) INSPECTION FOR ANY CRACK. Original Issue: November 25, 2008 Revision 3: June 27, 2024 Export Controlled ECCN: 9E991 767-53A0193 BOEING PROPRIETARY - See page 1 for details 12 of 348 ### Page 13 Commercial Airplanes 767 Service Bulletin ALERT Number: 767-53A0193 Original Issue: November 25, 2008 Revision 3: June 27, 2024 ATA System: 5330 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. 1. PLANNING INFORMATION A. Effectivity 1. Airplanes This bulletin is applicable to 767-200, 767-300, 767-300F, 767-400ER Airplane(s), line number(s) 1-717, 719-928 in 15 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive. The Variable Numbers and Group Information for the applicable airplanes is given below. Refer to PRR B12901-135RS for data about this change. This service bulletin is for the airplanes shown below. Aircraft Maintenance Manual (AMM) changes were released after line number 928 to address proper methods of paint and sealant removal to reduce the possibility of scribe damage. Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. DESCRIPTIONCONFIGURATIONGROUP 767-200, 767-200ER airplanes with one Type III over wing exit door and forward large cargo door. -1 767-200, 767-200ER airplanes with one Type III over wing exit door and forward small cargo door. -2 767-200ER airplanes with two Type III over wing exit doors with forward large cargo door. -3 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 13 of 348 ### Page 14 DESCRIPTIONCONFIGURATIONGROUP 767-200 airplanes with two Type III over wing exit doors with forward small cargo door. -4 767-300ER airplanes with forward entry door, Type I emergency exit door, and forward large cargo door. -5 767-300 airplanes with forward entry door, Type I emergency exit door, and forward small cargo door. -6 767-300ER airplanes with forward entry doors, one Type III over wing exit door, and forward large cargo door. -7 767-300ER airplanes with forward entry doors, one Type III over wing exit door, and forward small cargo door. -8 767-300, 767-300ER airplanes with two Type III over wing exit doors with forward large cargo door. -9 767-300 airplanes with two Type III over wing exit doors with forward small cargo door. -10 All 767-300F airplanes.-11 All 767-400ER airplanes.-12 767-200SF airplane.-13 767-300BCF airplanes that have not done a visual inspection for scribe lines, at S-8R between STA 434 and STA 654+22 and S-26L between STA 434 and STA 654+22, in the new cargo door area completed prior to freighter conversion, and were previously in Group 14, Configuration 1 at Revision 2 of this service bulletin. -14 767-300BCF airplanes that have done a visual inspection for scribe lines, at S-8R between STA 434 and STA 654+22 and S-26L between STA 434 and STA 654+22, in the new cargo door area completed prior to freighter conversion, and were previously in Group 14, Configuration 2 at Revision 2 of this service bulletin. -15 Airplane Models: 767-200, 767-300, 767-300F, 767-400ER GroupVariable Number 2VA001 - VA020 2VA301 - VA315 2VA501 - VA510 GroupVariable Number 13VA511 2VA512 - VA530 1VA701 - VA719 GroupVariable Number 2VA801 - VA810 1VB001 - VB002 2VB051 - VB055 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 14 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 15 GroupVariable Number 2VB101 - VB125 2VB201 - VB202 2VB251 - VB253 2VB281 - VB284 4VB301 - VB302 4VB321 - VB332 2VB371 - VB373 1VB401 2VB441 - VB444 1VE001 - VE003 1VE021 - VE023 1VE041 - VE043 1VE061 - VE069 1VE083 - VE086 1VE101 - VE104 1VE116 - VE118 1VE121 - VE126 1VE141 - VE152 1VE171 - VE172 1VF001 - VF002 1VF041 - VF042 1VF051 1VF061 - VF062 1VF071 - VF072 1VF091 - VF093 3VF101 - VF102 1VF161 - VF162 1VF171 - VF172 1VF180 2VF181 - VF184 1VF251 10VK001 - VK016 9VK021 - VK022 GroupVariable Number 10VK031 - VK056 10VK081 - VK113 6VK131 - VK133 9VK141 - VK148 7VK161 - VK164 9VK171 9VK181 9VK186 7VL001 - VL006 7VL011 9VL701 - VL703 7VL751 - VL755 5VL806 - VL807 5VL871 - VL873 5VL891 - VL900 5VL911 - VL914 9VL931 - VL932 9VL941 9VN001 - VN041 9VN051 - VN064 9VN081 - VN099 5VN111 - VN127 5VN130 - VN137 9VN151 - VN158 9VN163 - VN168 8VN171 - VN173 7VN174 14VN191 - VN195 15VN196 - VN197 9VN198 7VN211 - VN212 9VN221 - VN225 7VN231 - VN234 GroupVariable Number 7VN241 - VN243 9VN251 - VN276 9VN291 - VN293 7VN301 - VN314 5VN371 - VN372 5VN376 5VN381 - VN388 5VN421 9VN422 - VN427 9VN436 5VN471 - VN472 9VN491 - VN513 5VN531 - VN532 5VN536 - VN537 5VN541 - VN542 5VN546 - VN547 5VN551 5VN556 - VN557 5VN561 - VN562 5VN631 - VN633 7VN634 - VN636 5VN637 - VN638 9VN651 - VN658 9VN671 - VN672 9VN676 10VN681 - VN691 9VN731 - VN732 9VN751 - VN753 7VN791 - VN792 9VN811 - VN813 5VN921 - VN922 9VN931 - VN936 5VN951 - VN953 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 15 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 16 GroupVariable Number 9VN966 - VN972 12VQ001 - VQ021 12VQ071 - VQ086 1VR051 - VR060 1VR081 1VR084 1VR086 11VR201 - VR211 11VR251 11VR256 - VR260 10VR401 9VR421 - VR423 9VR426 10VR441 9VR461 10VR471 - VR472 5VS051 - VS056 7VS061 9VS066 - VS070 9VS073 - VS078 9VS091 - VS104 9VS111 - VS113 GroupVariable Number 9VS131 - VS133 5VS136 - VS137 9VS176 - VS177 9VS186 - VS187 9VS196 - VS203 9VS206 - VS208 5VS211 5VS216 - VS217 9VS231 5VS246 - VS248 5VS261 - VS263 9VS266 - VS274 9VS291 - VS293 9VS301 - VS303 5VS306 - VS311 5VS316 5VS321 - VS324 5VS331 - VS333 5VS336 - VS337 9VS366 - VS367 9VS381 - VS382 9VS391 - VS392 GroupVariable Number 9VS401 5VS426 - VS428 9VS466 - VS472 9VS486 7VS496 - VS497 7VS506 - VS507 9VS526 9VS546 - VS549 9VS701 - VS711 9VS721 - VS731 9VS751 - VS759 9VS821 - VS825 9VS841 - VS844 9VS861 5VS881 - VS882 5VS891 9VS896 11VT501 1VV001 11VW701 - VW721 11VW851 -- 2. Spares Affected None. B. Concurrent Requirements None. C. Reason This service bulletin gives instructions to inspect for scribe lines in the fuselage skin at skin lap joints, the skin at certain external approved repairs, the skin around external features such as antennas, and the skin at decals. Fatigue cracks can develop at scribe line locations. Any crack that remains undetected could grow large and cause a rapid decompression. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 16 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 17 Thirteen (13) 767 airplanes have been found with scribe line damage by 11 operators. Scribe lines were found at skin lap joints, butt joints, around external repairs and antennas, and at locations where decals were cut. Many of the scribe lines appear to have been made when sealant was removed as part of preparation of the airplane for repainting. The airplanes had between 6300 flight cycles and 24,600 flight cycles. No cracks as a result of scribe lines on 767 airplanes have been reported to Boeing. Since the original issue date on this service bulletin, an additional twenty four (24) 767 airplanes have been reported with scribe line damage. A scribe line is a narrow, shallow, distinct line of damage (typically up to 0.006 inch deep), usually associated with the removal of a fillet or gap seal (lap joints and butt joints, respectively). A more detailed definition of a scribe line is included in Accomplishment Instructions Paragraph 3.B. - Identification of a "Typical" Scribe Line. A review of fleet activity yields two separate scenarios that are suspected to have caused scribe lines to the fuselage skin. The first scenario involves the paint stripping and repainting of airplanes. In the process of stripping and preparing the airplane for paint, tools were used to remove sealant and paint buildup at lap joints, at certain external approved repair doublers or door scuff plates, or around external features. Tools like scrapers (steel, wood, hard plastic etc.), knives, or utility knives can damage the skin. Fatigue cracks can develop at scribe line locations. The second scenario is decal application on/or removal from the fuselage. To install the decals across lap joint steps or repairs, investigation into maintenance practices has shown that decals have been cut in place, using some form of knife, to allow the decal to lie flush to the skin at these stepped locations. This operation results in scribe lines at the decal cut location. Based on service reports, sharp tools have also been used for close trimming of the decals outline. This type of decal trimming has also left scribe lines on the fuselage skin. The above maintenance operations can each lead to the same type of scribe line damage and subsequent premature fatigue cracks. The freighter modifications done to Group 13 and Group 14 airplanes have multiple modified lap splices locations, as well as additional external doublers, skin replacements and door cutouts in Section 43. The addition of these modifications prevent the ability for Group 13 and Group 14 operators to do the Airworthiness Directive (AD) mandated inspections as given in Service Bulletin (SB) 767-53A0193 Revision 1. The modified parts could hide pre-existing scribe lines that if undetected, could turn into undetected cracks in the fuselage skin. All other Boeing Converted Freighter (BCF) airplanes are required to have areas affected by the freighter modification inspected before conversion and all remaining areas of these airplanes are addressed under the passenger configuration. Boeing Service Related Problem (SRP) 767-SRP-53-0244 and 767-SRP-53-0672 are related to this service bulletin. Boeing Fleet Team Digest (FTD) 767-FTD-53-06001 and 767-FTD-53-23001 are related to this service bulletin. Revision 1 was sent to change initial inspection locations and LRTS inspection locations and repeat inspection intervals for skin lap joint inspections. In addition, caution notes are added to advise operators not to blend scribe lines. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 17 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 18 These sections were changed: 1. In Paragraph 1.E., Compliance, Table 1 was changed to clarify footnote (f). 2. In Paragraph 1.E., Compliance, Table 2 was changed to clarify footnotes (f) and (g) and add footnote (h). 3. In Paragraph 1.E., Compliance, Table 3 was changed to clarify footnote (e) and add footnote (f). 4. In Paragraph 1.E., Compliance, Table 4 was changed to clarify footnotes (a) and (d) and remove footnotes (b) and (e). 5. In Paragraph 1.E., Compliance, Tables 5 through 14 were changed for LRTS inspection locations and repeat inspection intervals for skin lap joint inspections. 6. In Paragraph 1.K., Publications Affected, added Damage Tolerance Based Structural Inspection information. 7. In Paragraph 3.A., General Information, Note 16 was added to advise operators not to blend scribe lines. 8. In Paragraph 3.B., Work Instructions, Figures 1 through 36 were changed to reflect changes in affected skin lap joint inspection locations. 9. In Paragraph 3.B., Work Instructions, a Caution note that advises operators not to blend scribe lines was added to Figures 1 through 72. Revision 2 is sent to: 1. Create two new Groups of Airplanes for 767 Special Freighters (767-200SF - Group 13) and 767 Boeing Converted Freighters (767-300 BCF - Group 14). 2. Clarify the Non-Destructive Testing (NDT) inspection requirements for the skin lap joints, external approved repairs, and external features. 3. Add Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-06-16 to this service bulletin and clarify recommended reporting requirements. 4. Clarify inspection requirements for scribe line damage outside of Zone 1, 2, or 3. 5. Change the terminology in the Work Instructions to agree with the terminology defined in Paragraph 3.A. General Information - Notes. 6. Change terminology from "Special Detailed Inspections" to Non-Destructive Testing (NDT) Inspections throughout the service bulletin. 7. Clarify inspection criteria for "Existing Scribe Lines". Revision 3 is sent to adjust inspection intervals that were reduced in Revision 2 and to move inspections from areas where the lower skins were replaced during passenger to freighter conversion for 767-300BCF airplanes in Group 13 and Group 14. Group 15 was created for clarity only, these airplanes are not affected by the changes in Revision 3. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 18 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 19 The data given in Alternative Method of Compliance Notice 767-53A0193-AMOC-01, 767-53A0193-AMOC-02 and 767-53A0193-AMOC-03 are included in this Revision 3. The data given in Information Notice 767-53A0193 IN 01 is included in this Revision 3. D. Description At or before the scribe line inspection thresholds shown in this service bulletin, remove paint and sealant at the applicable locations. Do a detailed inspection of the fuselage skin at applicable skin lap joints, external approved repairs, external features, and decals for any scribe line or any crack. If any crack is found, contact Boeing for repair instructions and do the repair. When scribe lines are found, they shall be repaired before further flight. As an alternative to immediate repair, for a scribe line that qualifies, the provided Limited Return To Service (LRTS) program may be used to allow airplanes to return to revenue flight for a limited period before scribe lines are repaired. This service bulletin contains a LRTS program. The LRTS program consists of repeat inspections to detect any crack where scribe lines were found. Total airplane flight cycles, location, and extent of scribe line must meet specific criteria in order for a scribe line to qualify for a LRTS program. Each affected structural location within a LRTS program will be terminated with a repair. This service bulletin has specific instructions for calculating separate inspection thresholds based on fatigue life for the identified locations. With the use of maintenance records, operators can implement the inspection program based on potential scribe line opportunities in an airplane's maintenance history. If this maintenance records-based threshold program is not used, then 6,000 flight cycles shall be assigned as the cycle level when potential scribing first occurred. Since a scribe line can occur at any time during the service life of an airplane and at many locations, this program uses both total flight cycles and structural criticality of location to determine the inspection requirements. Criticality of location allows this service bulletin to address the most critical areas first and to provide less critical areas with appropriately reduced compliance requirements. Criticality of location determines the inspection thresholds for each location. This service bulletin uses figures and compliance times to address all of the critical locations and ranges of inspection thresholds. Each critical piece of structure susceptible to a scribe line is assigned to a figure. The affected structure for each group of airplanes is identified in individual figures in this service bulletin. Revision 2 - No more work is necessary on Group 1-12 airplanes inspected in accordance with Revision 1 of this service bulletin. However, operators of Group 1-12 airplanes should consider reviewing Limited Return to Service (LRTS) inspection thresholds for scribe lines placed on LRTS Program in original issue date or Revision 1 of this service bulletin. Revision 2 allows the operator to delay LRTS inspections until the inspection threshold of the zone in which the scribe line is located. Refer to Table 21 for scribe lines located outside of Zones 1, 2, and 3. More work is necessary for new Groups 13 and 14, which were created as a result of this revision. Additional work requirements are to do a Non-Destructive Testing (NDT) inspection of specific skin lap joints for cracks. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 19 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 20 Effects of Revision 3 on airplanes on which the Original Issue, Revision 1 or Revision 2 was previously done: ActionConditionGroup None.Airplanes that have done a detailed inspection at applicable skin lap joints, external approved repairs, external features, and decals for any scribe line or any crack. Group 1-12 None.Airplanes that have done a SF or BCF conver- sion and have done inspection of fuselage skin at applicable skin lap joints, external ap- proved repairs, external features, and decals for any scribe line or any crack. Group 13-15 Note: Rev 3 provides revised LRTS program available for aircraft with found scribe. And Airplanes that have incorporated NDT inspec- tion of applicable skin laps as specified in Revision 2 for Group 13 and 14. Do NDT inspection of applicable skin laps.Airplanes that have done a SF or BCF conver- sion and have done inspection of fuselage skin at applicable skin lap joints, external ap- proved repairs, external features, and decals for any scribe line or any crack. Group 13-14 And Have not incorporated NDT inspection of ap- plicable skin laps as specified in Revision 2.. The work in this service bulletin is done in the maintenance zone(s) given below. Group 1-4, 13: Affected Maintenance Zones ZoneModel 113, 114, 117, 118, 119, 121, 122, 123, 124, 125, 126, 151, 152, 153, 154, 155, 156, 161, 162, 163, 164, 165, 166, 211, 212, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244, 251, 252, 253, 254 767-200 Group 5-10, 14-15: Affected Maintenance Zones ZoneModel 113, 114, 117, 118, 119, 121, 122, 123, 124, 125, 126, 151, 152, 153, 154, 155, 156, 161, 162, 163, 164, 165, 166, 211, 212, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244, 251, 252, 253, 254 767-300 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 20 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 21 Group 11: Affected Maintenance Zones ZoneModel 113, 114, 117, 118, 119, 121, 122, 123, 124, 125, 126, 151, 152, 153, 154, 155, 156, 161, 162, 163, 164, 165, 166, 211, 212, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244, 251, 252, 253, 254 767-300F Group 12: Affected Maintenance Zones ZoneModel 113, 114, 117, 118, 119, 121, 122, 123, 124, 125, 126, 151, 152, 153, 154, 155, 156, 161, 162, 163, 164, 165, 166, 211, 212, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244, 251, 252, 253, 254 767-400ER E. Compliance Federal Aviation Administration (FAA) Airworthiness Directive AD 2010-06-16, is related to this service bulletin. The effective date of AD 2010-06-16 is April 21, 2010. The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin revision mandatory. Operators are not required to report scribe line findings unless cracks are found. Inspection zone thresholds are based upon analysis of fuselage geometry and loads. Zone 1 has the lowest inspection threshold and Zone 3 has the highest inspection threshold. This service bulletin has four (4) areas for scribe line inspections. The areas are as follows: — Skin Lap Joints — External Approved Repairs — External Features — Decals The Compliance tables are broken down into three main sections as follows: 1. Tables 1 through 4 are used to show the initial scribe line inspection for the four (4) areas to be inspected. 2. Tables 5 through 20, 22, 23, and 24 are used to show the LRTS repeat inspection intervals for the four (4) areas to be inspected. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 21 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 22 NOTE: It is acceptable for operators to begin Limited Return to Service (LRTS) inspections upon initial discovery of a scribe line. However, the LRTS inspection program for scribe lines found prior to the Zone threshold may be delayed until the actual compliance time threshold for that particular Zone has been reached. The entire lap joint does not need to be inspected at the same time; each area along the lap joint may be inspected at its associated LRTS inspection interval. Pay close attention to the Group Number and Inspection Area in the title of the table. 3. Table 21 is used to show the inspection interval for Accomplishment Instructions Paragraph 3.B - Part 8 - Scribe Line Damage - Outside of Zones 1, 2, and 3. Group 1-15: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 25,000 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) (g) All Airplanes Skin Lap Joints Zone 1 -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 37,500 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) (g) All Airplanes Skin Lap Joints Zone 2 -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 50,000 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) (g) All Airplanes Skin Lap Joints Zone 3 ---No further inspections are required. (b) No scribe line or damage is found.(c) --Before further flight. Measure the scribe line depth in ac- cordance with Accomplishment In- structions Paragraph 3.B - Part 4. Any scribe line is found. (c) ---No further inspections are required. (b) Scribe line is found less than 0.001 inch deep. (c) Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 22 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 23 Group 1-15: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspec- tions for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than or equal to 0.001 inch deep and less than or equal to 0.006 inch deep. (c) Or --Before further flight. Contact Boeing for repair instructions and do the repair. --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspec- tions for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) And --Before further flight. Contact Boeing for repair instructions and do the repair. Refer to the LRTS Tables 5-14 and Tables 22-23 for repeat intervals. (h) (i) -Before repeat intervals in Ta- bles 5-14 and Tables 22-23. (h) (i) Do the repeat inspections in accor- dance with Accomplishment Instruc- tions Paragraph 3.B - Part 6. (h) (i) If no crack is found and the scribe line is greater than or equal to 0.001 inch deep and less than or equal to 0.006 inch. Or --Before further flight. Contact Boeing for repair instructions and do the repair. --Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 75,000 total flight cy- cles. Contact Boeing for additional inspec- tions or repair. Do the additional in- spections or repair. All airplanes with scribe line using a LRTS program in- spection. (a) First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below: 1. If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not available, add 6,000 to the threshold. (b) No further inspections are required at this location, provided that the correct sealant removal procedure is used for all future work. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 23 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 24 Group 1-15: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition (c) Refer to Accomplishment Instructions Paragraph 3.B for identification of a typical scribe line. (d) If operator's records show that the airplane has never been stripped or repainted since delivery from Boeing and correct sealant removal procedure is implemented for all future work, then the skin lap joint inspections are not required, except as noted in (g) below. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (e) If the operator's records show that the airplane has never been stripped or repainted under the wing-to- body fairings since delivery from Boeing and correct sealant removal procedure is implemented for all future work, then the skin lap joint inspections in the areas under the wing-to-body fairing are not required. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (f) If the operator's records show that correct sealant removal procedures have been used at all times since delivery, then the skin lap joint inspections are not required, except as noted in (g) below. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (g) If a decal is installed, or was previously installed, across a skin lap joint that requires inspection, the inspection exemption per note (d) and (f) does not apply. The skin lap joint inspection must still be done for the affected skin lap joint at the threshold in accordance with this table. However, the (d) and (f) exemptions may be used if the operator can demonstrate that since delivery from Boeing they have had procedures in place that protect the skin and cannot result in scribe line damage. This includes any decal installation, application, removal, trimming or cutting of decals. The procedures must demonstrate that an inspection has been done before decal installation and that an inspection of the skin to confirm that the area is free of damage after decal installation. (h) For Group 13, Table 1.1 satisfies LRTS inspection requirements for the following lap joint areas: – Skin lap joint at S-8R between STA 434 and STA 676 – Skin lap joint at S-26L between STA 434 and STA 676 (i) For Group 14, Table 1.2 satisfies LRTS inspection requirements for the following lap joint areas: – Skin lap joint at S-8R between STA 434 and STA 654+22 – Skin lap joint at S-26L between STA 434 and STA 654+22 – Skin lap joint at S-2R STA 654+115 - 654+121 Group 13: Table 1.1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection at S-26L and S-8R Skin Lap Joints between STA 434 and STA 676 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition 2,300 Flight CyclesWithin 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 25,000 total flight cycles plus first scribe line opportuni- ty. (b) Do a Non-Destruc- tive Testing (NDT) inspection in accor- dance with Figure 86, Table 2, Area 1. (a) All airplanes. Skin lap joint at S- 26L between STA 434 and STA 676. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 24 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 25 Group 13: Table 1.1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection at S-26L and S-8R Skin Lap Joints between STA 434 and STA 676 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition 3,000 Flight CyclesWithin 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 37,500 total flight cycles plus first scribe line opportuni- ty. (b) Do a NDT inspection in accordance with Figure 86, Table 2, Area 1. (a) All airplanes. Skin lap joint at S-8R between STA 434 and STA 676. --Before further flight.Contact Boeing for repair instructions and do the repair. If any crack is found. -Within 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 75,000 total flight cycles. Contact Boeing for additional inspec- tions or repair. Do the additional inspec- tions or repair. All airplanes. (a) This repetitive inspection is required even if no scribe line is found. - Note: During modification from passenger to freighter, new skin panels were installed that are longer than the initial skin panels. The lower edge of the new longer skin panels may cover and hide potential scribe line damaged areas along the lap joint. (b) First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below: - If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. - If record of first paint since delivery is not available, add 6,000 to the threshold. Group 14, Table 1.2 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection at S-26L, S-8R and S-2R Skin Lap Joints between STA 434 and STA 654+121 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition 2,300 Flight CyclesWithin 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 25,000 total flight cycles plus first scribe line opportuni- ty. (b) Do a Non-Destruc- tive Testing (NDT) inspection in accor- dance with Figure 87, Table 2, Area 1. (a) All airplanes. Skin lap joint at S- 26L between STA 434 and STA 654+22. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 25 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 26 Group 14, Table 1.2 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection at S-26L, S-8R and S-2R Skin Lap Joints between STA 434 and STA 654+121 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition 3,000 Flight CyclesWithin 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 37,500 total flight cycles plus first scribe line opportuni- ty. (b) Do a NDT inspection in accordance with Figure 87, Table 2, Area 1. (a) All airplanes. Skin lap joint at S-8R between STA 434 and STA 654+22. 4,000 Flight CyclesWithin 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 50,000 total flight cycles plus first scribe line opportuni- ty. (b) Do a NDT inspection in accordance with Figure 87, Table 2, Area 1. (a) All airplanes. Skin lap joint at S-2R STA 654+115- 654+121. --Before further flight.Contact Boeing for repair instructions and do the repair. If any crack is found. -Within 4,000 flight cycles or 24 months after the revision 03 issue date of this service bulletin whichever occurs first. Before 75,000 total flight cycles. Contact Boeing for additional inspec- tions or repair. Do the additional inspec- tions or repair. All airplanes. (a) This repetitive inspection is required even if no scribe line is found. - During modification from passenger to freighter, new skin panels were installed that are longer than the initial skin panels. The lower edge of the new longer skin panels may cover and hide potential scribe line damaged areas along the lap joint. (b) First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below: - If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. - If record of first paint since delivery is not available, add 6,000 to the threshold. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 26 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 27 GROUP 1-15: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 25,000 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) (g) (h) All Airplanes External Ap- proved Repairs - 20 inches or longer on any side Zone 1 -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 25,000 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) (g) (h) All Airplanes External Ap- proved Repairs - Less than 20 inches on all sides Zone 1 ---No further inspections are re- quired.(b) No scribe line or damage is found.(c) --Before further flight. Measure the scribe line depth in ac- cordance with Accomplishment In- structions Paragraph 3.B - Part 4. Any scribe line is found. (c) ---No further inspections are required. (b) Scribe line is found less than 0.001 inch deep. (c) --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspec- tions for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than or equal to 0.001 inch deep and less than or equal to 0.006 inch deep. (c) Or --Before further flight. Contact Boeing for repair instructions and do the repair. --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspec- tions for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) And --Before further flight. Contact Boeing for repair instructions and do the repair. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 27 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 28 GROUP 1-15: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition Refer to the LRTS Table 15 for repeat intervals. -Before the com- pliance times in Table 15. Do the repeat inspections in accor- dance with Accomplishment Instruc- tions Paragraph 3.B - Part 6. If no crack is found and the scribe line is greater than or equal to 0.001 inch deep and less than or equal to 0.006 inch. Or --Before further flight. Contact Boeing for repair instructions and do the repair. --Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Within 4,000 flight cycles af- ter the original issue date on this service bulletin. Before 75,000 total flight cy- cles. Contact Boeing for additional inspec- tions or repair. Do the additional in- spections or repair. All airplanes with scribe line using a LRTS program in- spection. First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below: (a) 1. If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not available, add 6,000 flight cycles to the threshold. No further inspections are required at this location, provided that the correct sealant removal procedure is used for all future work. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (b) Refer to Accomplishment Instructions Paragraph 3.B for identification of a typical scribe line.(c) If operator's records show that the airplane has never been stripped or repainted since delivery from Boeing and correct sealant removal procedure is implemented for all future work, then the external ap- proved repair inspections are not required, except as noted in (g) below. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (d) If the operator's records show that the airplane has never been stripped or repainted under the wing-to- body fairings since delivery from Boeing and correct sealant removal procedure is implemented for all future work, then the external approved repair inspections in the areas under the wing-to-body fairing are not required. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (e) If the operator's records show that correct sealant removal procedures have been used at all times since delivery, then the external approved repair inspections are not required, except as noted in (g) below. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (f) For each repair, if operator's records show that the airplane has never been stripped or repainted since the repair has been installed, then the external approved repair inspections for the specific repair are not required, except as noted in (h) below. (g) Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 28 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 29 GROUP 1-15: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition If a decal is installed, or was previously installed across an external approved repair, the exemption per note (g) does not apply. The external approved repair inspection must still be done for the affected external approved repair at the threshold in accordance with this table. However, exemption (f) and (g) may be used if the operator can demonstrate that since delivery from Boeing they have had procedures in place that protect the skin and cannot result in scribe line damage. This includes any decal installation, appli- cation, removal, trimming or cutting of a decal. The procedures must demonstrate that an inspection has been done before decal installation and that an inspection of the skin to confirm that the area is free of damage after decal installation. (h) Group 1-15: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,000 flight cycles af- ter the original issue date on this service bul- letin. Before 37,500 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) (e) (f) All Airplanes External Features Zone 2 ---No further inspections are re- quired.(b) No scribe line or damage is found.(c) --Before further flight. Measure the scribe line depth in ac- cordance with Accomplishment In- structions Paragraph 3.B - Part 4. Any scribe line is found. (c) ---No further inspections are required. (b) Scribe line is found less than 0.001 inch deep. (c) --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) in- spections for any crack in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than or equal to 0.001 inch deep and less than or equal to 0.006 inch deep. (c) Or --Before further flight. Contact Boeing for repair instruc- tions and do the repair. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 29 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 30 Group 1-15: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition --Before further flight. Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) in- spections for any crack in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) And --Before further flight. Contact Boeing for repair instruc- tions and do the repair. Refer to the LRTS Tables 16-19 for repeat intervals. -Before repeat intervals in Ta- bles 16-19. Do the repeat inspections in accor- dance with Accomplishment Instruc- tions Paragraph 3.B - Part 6. If no crack is found and the scribe line is greater than or equal to 0.001 inch deep and less than or equal to 0.006 inch. Or --Before further flight. Contact Boeing for repair instruc- tions and do the repair. --Before further flight. Contact Boeing for repair instruc- tions and do the repair. If any crack is found. -Within 4,000 flight cycles af- ter the original issue date on this service bul- letin. Before 75,000 total flight cy- cles. Contact Boeing for additional inspec- tions or repair. Do the additional in- spections or repair. All airplanes with scribe line using a LRTS program in- spection. First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below: (a) 1. If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not available, add 6,000 flight cycles to the threshold. No further inspections are required at this location, provided that the correct sealant removal procedure is used for all future work. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (b) Refer to Accomplishment Instructions Paragraph 3.B for identification of a typical scribe line.(c) If operator's records show that the airplane has never been stripped or repainted since delivery from Boeing and correct sealant removal procedures have been and continue to be implemented for all future work, then the external feature inspections are not required. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (d) If the operator's records show that correct sealant removal procedures have been used at all times since delivery, then the external feature inspections are not required, except as noted in (f) below. Refer to Appendix A of this service bulletin as an accepted sealant removal procedure. (e) Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 30 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 31 Group 1-15: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition If a decal is installed, or was previously installed across an external feature, the exemption per note (e) does not apply. The external feature inspection must still be done for the affected external feature at the threshold in accordance with this table. However, exemption (e) may be used if the operator can demon- strate that since delivery from Boeing they have had procedures in place that protect the skin and cannot result in scribe line damage. This includes any decal installation, application, removal, trimming or cutting of a decal. The procedures must demonstrate that an inspection has been done before decal installation and that an inspection of the skin to confirm that the area is free of damage after decal installation. (f) Group 1-15: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,000 flight cycles af- ter the original issue date on this service bul- letin. Before 50,000 total flight cycles plus first scribe line opportunity. (a) Do a detailed inspection for any scribe line using the tables in accor- dance with the Accomplishment In- structions Paragraph 3.B - Part 2. (d) All Airplanes Decals Zone 3 ---No further inspections are required.No scribe line or damage is found.(c) --Before further flight. Measure the scribe line depth in ac- cordance with Accomplishment In- structions Paragraph 3.B - Part 4. Any scribe line is found. (c) ---No further inspections are required.Scribe line is found less than 0.001 inch deep. (c) --Before further flight. Do High Frequency Eddy Current (HFEC) inspection for any crack in accordance with the Accomplish- ment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than or equal to 0.001 inch deep and less than or equal to 0.006 inch deep.(c) Or --Before further flight. Contact Boeing for repair instruc- tions and do the repair. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 31 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 32 Group 1-15: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition --Before further flight. Do High Frequency Eddy Current (HFEC) inspection for any crack in accordance with the Accomplish- ment Instructions Paragraph 3.B - Part 5. Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) And --Before further flight. Contact Boeing for repair instruc- tions and do the repair. Refer to the LRTS Table 20 for repeat intervals. -Before compli- ance times in Table 20. Do the repeat inspections in accor- dance with Accomplishment Instruc- tions Paragraph 3.B - Part 6. If no crack is found and the scribe line is greater than or equal to 0.001 inch deep and less than or equal to 0.006 inch. Or --Before further flight. Contact Boeing for repair instruc- tions and do the repair. --Before further flight. Contact Boeing for repair instruc- tions and do the repair. If any crack is found. -Within 4,000 flight cycles af- ter the original issue date on this service bul- letin. Before 75,000 total flight cy- cles. Contact Boeing for additional inspec- tions or repair. Do the additional in- spections or repair. All airplanes with scribe line using a LRTS program in- spection. First scribe line opportunity is provided by maintenance records. Adjust the compliance time as shown below. Operator is to use the lowest of the below adjustments to the threshold in determining first scribe line opportunity. (a) 1. If record of first paint since delivery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first decal installation is available, then add the airplane flight cycles at first decal installation to the threshold. 3. If neither first paint nor first decal installation records are available since delivery, add 6,000 flight cycles to the threshold. Removed at Revision 1 of this Service Bulletin.(b) Refer to Accomplishment Instructions Paragraph 3.B for identification of a typical scribe line.(c) Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 32 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 33 Group 1-15: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition Decal inspections are not required at locations where all the conditions specified in items 1., 2., and 3. are met. (d) 1. If the operator's records show the airplane has never had decals installed in the area of inspection since delivery. and 2. If operator's records show that the airplane has never been stripped or repainted since delivery from Boeing. and 3. If the operator's records show that at locations where the operator can demonstrate that since delivery from Boeing they have had procedures in place that protect the skin and cannot result in scribe line damage. This includes any decal installation, application, removal, trimming, or cutting of decals. The procedures must demonstrate that an inspection must be done before decal installation and that an inspection of the skin to confirm that the area is free of damage must be done after decal installation. Removed at Revision 1 of this Service Bulletin.(e) Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 33 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 34 Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 2,000-STA 434 - 456S-36R 2,300-STA 456 - 500 2,000-STA 632 - 676 2,300-STA 676 - 786 2,000-STA 1395 - 1540 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,000-STA 434 - 456 3,000-STA 654 - 742 3,000-STA 1109 - 1175 4,300-STA 1175 - 1219 4,300-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,000-STA 676 - 764 4,300-STA 1087 - 1241 4,000-STA 1417 - 1461 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,400-STA 434 - 764 3,500-STA 1087 - 1373 3,000-STA 1417 - 1461 3,000-STA 434 - 720S-2R Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 34 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 35 Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 720 - 764 3,500 - 2,500-STA 1417 - 1562 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,300-STA 434 - 786 3,400-STA 1087 - 1373 4,000-STA 1373 - 1461 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 632 2,600-STA 654 - 742 3,000-STA 742 - 786 3,800-STA 1065 - 1263 3,400-STA 1263 - 1307 3,000-STA 1307 - 1329 3,000-STA 1329 - 1461 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 588 2,400-STA 588 - 632 3,300-STA 632 - 764 3,500-STA 1153 - 1307 3,000-STA 1307 - 1395 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,200-STA 434 - 764S-36L 3,200-STA 1263 - 1307 2,200-STA 1307 - 1351 3,000-STA 1417 - 1461 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 35 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 36 Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition 2,000-STA 1480 - 1540 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 36 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 37 Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 2,000-STA 434 - 500S-36R 3,500-STA 500 - 544 2,500-STA 654 - 786 2,000-STA 1395 - 1540 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 2,800-STA 434 - 478 3,000-STA 676 - 742 3,000-STA 1109 - 1175 4,300-STA 1175 - 1219 4,300-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,000-STA 434 - 500 4,000-STA 676 - 764 4,300-STA 1087 - 1241 4,000-STA 1417 - 1461 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,400-STA 434 - 764 3,500-STA 1087 - 1373 3,000-STA 1417 - 1461 3,000-STA 434 - 720S-2R Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 37 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 38 Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 720 - 764 3,500 - 2,500-STA 1417 - 1562 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,300-STA 434 - 786 3,400-STA 1087 - 1373 4,000-STA 1373 - 1461 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 632 2,600-STA 654 - 742 3,000-STA 742 - 786 3,800-STA 1065 - 1263 3,400-STA 1263 - 1307 3,000-STA 1307 - 1329 3,000-STA 1329 - 1461 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 588 2,400-STA 588 - 632 3,300-STA 632 - 764 3,500-STA 1153 - 1307 3,000-STA 1307 - 1395 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,200-STA 434 - 764S-36L 3,200-STA 1263 - 1307 2,200-STA 1307 - 1351 3,000-STA 1417 - 1461 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 38 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 39 Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition 2,000-STA 1480 - 1540 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 39 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 40 Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 478S-36R 3,000-STA 654 - 698 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,800-STA 434 - 456 3,800-STA 654+22 - 654+88 3,000-STA 654+88 - 698 5,000-STA 698 - 764 4,000-STA 1153 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,300-STA 434 - 456 3,000-STA 1197+22 - 1197+132 4,000-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,400-STA 434 - 654 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 40 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 41 Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 654+110 - 675 4,800- 2,000-STA 1197+22 - 1197+132 3,500-STA 1241 - 1373 3,400-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654 2,000-STA 1197+22 - 1197+132 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 3,500-STA 676 - 720 3,500-STA 1197+110 - 1219 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 4,500-STA 1562 - 1582 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 2,000-STA 610 - 654+88 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 41 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 42 Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 654+88 - 676 3,000- 4,500-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 764 4,000-STA 1197+88 - 1219 3,000-STA 1241 - 1307 2,000-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 42 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 43 Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 522S-36R 3,000-STA 566 - 698 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,000-STA 434 - 478 4,000-STA 654+22 - 654+88 3,000-STA 654+88 - 698 5,000-STA 698 - 764 4,000-STA 1153 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,000-STA 434 - 522 3,000-STA 1197+22 - 1197+132 4,000-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,500-STA 434 - 654 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 43 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 44 Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 654+110 - 676 4,500- 2,000-STA 1197+22 - 1197+132 3,500-STA 1241 - 1373 3,400-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654 5,000-STA 654+121 - 764 2,000-STA 1197+22 - 1197+132 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 4,000-STA 676 - 720 3,500-STA 1197+110 - 1219 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 4,500-STA 1562 - 1582 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 44 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 45 Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 610 - 654+88 2,000- 3,000-STA 654+88 - 676 5,000-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 764 4,000-STA 1197+88 - 1219 3,000-STA 1241 - 1307 2,000-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 45 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 46 Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 478S-36R 3,000-STA 654 - 698 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1502 3,000-STA 1518 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,800-STA 434 - 456 3,800-STA 654+22 - 654+88 3,000-STA 654+88 - 698 5,000-STA 698 - 764 4,000-STA 1175 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,300-STA 434 - 456 3,000-STA 1109 - 1197+22 3,500-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,400-STA 434 - 654 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 46 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 47 Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 654+110 - 676 4,800- 3,000-STA 1087 - 1197+44 2,300-STA 1197+44 - 1197+132 3,500-STA 1241 - 1373 3,500-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654 3,000-STA 1109 - 1197+44 2,500-STA 1197+44 - 1197+132 4,000-STA 1197+132 - 1241 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 3,500-STA 676 - 720 3,000-STA 1109 - 1197+22 3,500-STA 1197+110 - 1219 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 4,500-STA 1562 - 1582 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 47 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 48 Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition 4,000-STA 132.5 - 246 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 2,000-STA 610 - 654+88 3,000-STA 654+88 - 676 4,500-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 764 3,000-STA 1241 - 1307 2,200-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 48 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 49 Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 522S-36R 3,000-STA 566 - 698 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1502 3,000-STA 1518 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,000-STA 434 - 478 4,000-STA 654+22 - 654+88 3,000-STA 654+88 - 698 5,000-STA 698 - 764 4,000-STA 1175 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,000-STA 434 - 522 3,000-STA 1109 - 1197+22 3,500-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,500-STA 434 - 654 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 49 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 50 Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 654+110 - 676 4,500- 3,000-STA 1087 - 1197+44 2,300-STA 1197+44 - 1197+132 3,500-STA 1241 - 1373 3,500-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654 5,000-STA 654+121 - 764 3,000-STA 1109 - 1197+44 2,500-STA 1197+44 - 1197+132 4,000-STA 1197+132 - 1241 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 4,000-STA 676 - 720 3,000-STA 1109 - 1197+22 3,500-STA 1197+110 - 1219 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 50 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 51 Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition 4,500-STA 1562 - 1582 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 2,000-STA 610 - 654+88 3,000-STA 654+88 - 676 5,000-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 765 3,000-STA 1241 - 1307 2,200-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 51 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 52 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 478S-36R 3,000-STA 654 - 654+110 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1502 3,000-STA 1518 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,800-STA 434 - 456 4,500-STA 654+22 - 654+88 3,500-STA 654+88 - 698 4,200-STA 698 - 764 4,000-STA 1175 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,300-STA 434 - 456 3,000-STA 654+44 - 720 3,000-STA 1109 - 1197+22 3,500-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 52 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 53 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 434 - 632 3,400 - 4,500-STA 632 - 654+66 3,500-STA 654+66 - 654+121 3,000-STA 1087 - 1197+44 2,300-STA 1197+44 - 1197+132 3,500-STA 1241 - 1373 3,500-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654+121 5,000-STA 720 - 764 3,000-STA 1109 - 1197+44 2,500-STA 1197+44 - 1197+132 4,000-STA 1197+132 - 1241 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 3,500-STA 654 - 654+66 3,000-STA 654+66 - 720 3,000-STA 1109 - 1197+22 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 53 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 54 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 1197+110 - 1219 3,500- 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 4,500-STA 1562 - 1582 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 2,000-STA 610 - 654 3,500-STA 654 - 676 5,000-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 764 3,000-STA 1241 - 1307 2,200-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 54 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 55 Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 3,000-STA 434 - 522S-36R 3,000-STA 566 - 698 3,000-STA 1197+66 - 1219 3,500-STA 1373 - 1417 2,000-STA 1417 - 1502 3,000-STA 1518 - 1562 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 3,000-STA 434 - 478 4,500-STA 654+22 - 654+88 3,500-STA 654+88 - 698 4,500-STA 698 - 764 4,000-STA 1175 - 1219 4,500-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 4,500-STA 434 - 522 3,000-STA 654+44 - 720 3,000-STA 1109 - 1197+22 3,500-STA 1395 - 1461 4,500-STA 1562 - 1582 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 55 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 56 Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 434 - 632 3,500 - 4,500-STA 632 - 654+66 3,500-STA 654+66 - 654+121 3,000-STA 1087 - 1197+44 2,300-STA 1197+44 - 1197+132 3,500-STA 1241 - 1373 3,500-STA 1417 - 1461 4,500-STA 1562 - 1582 3,000-STA 434 - 654+44S-2R 3,500-STA 654+44 - 654+88 4,000-STA 654+88 - 720 4,000-STA 1241 - 1307 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 3,500-STA 434 - 654+121 5,000-STA 720 - 764 3,000-STA 1109 - 1197+44 2,500-STA 1197+44 - 1197+132 4,000-STA 1197+132 - 1241 3,500-STA 1241 - 1373 4,000-STA 1562 - 1582 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 434 - 654 3,500-STA 654 - 654+66 3,000-STA 654+66 - 720 3,000-STA 1109 - 1197+22 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 56 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 57 Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 1197+110 - 1219 3,500- 4,000-STA 1219 - 1263 3,000-STA 1307 - 1461 4,500-STA 1562 - 1582 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 3,500-STA 434 - 610 2,000-STA 610 - 654 3,500-STA 654 - 676 5,000-STA 676 - 742 4,000-STA 1153 - 1285 3,000-STA 1285 - 1373 4,500-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,400-STA 434 - 654S-36L 2,000-STA 654 - 654+88 3,300-STA 654+88 - 654+121 3,000-STA 698 - 764 3,000-STA 1241 - 1307 2,200-STA 1307 - 1351 3,000-STA 1351 - 1461 2,000-STA 1502 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 57 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 58 Group 11: Table 13 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition --Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) inspections for any crack in accordance with the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Flight Cycles-Station LocationStringer Location From - To 2,000-STA 287 - 434S-37R 4,000-STA 434 - 500S-36R 4,000-STA 654 - 654+121 2,000-STA 1417 - 1582 6,000-STA 132.5 - 246S-30R 6,000-STA 246 - 434S-26R 4,000-STA 434 - 456 4,500-STA 654+22 - 654+110 3,000-STA 654+110 - 742 4,000-STA 1153 - 1197+66 5,000-STA 1417 - 1582 4,000-STA 132.5 - 246S-21R 2,000-STA 246 - Door CutoutS-17R 2,000-STA Door Cutout - 434 3,000-STA 654+66 - 676 4,000-STA 676 - 720 4,000-STA 1175 - 1197+22 3,000-STA 1197+22 - 1197+66 3,500-STA 1395 - 1461 4,000-STA 1461 - 1562 4,500-STA 212 - 246S-13R 4,000-STA 246 - 434S-8R 3,400-STA 434 - 632 4,500-STA 632 - 654+44 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 58 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 59 Group 11: Table 13 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition STA 1153 - 1197+88 3,000- 3,000-STA 1197+88 - 1219 3,500-STA 1241 - 1373 3,500-STA 1417 - 1562 5,000-STA 1241- 1285S-2R 3,000-STA 1285 - 1351 4,000-STA 1351 - 1417 3,000-STA 1417 - 1582 6,000-STA 188.9 - 246BL 0 4,000-STA 246 - 434S-8L 2,000-STA 1175 - 1197+132 3,500-STA 1219 - 1373 4,000-STA 1417 - 1461 4,000-STA 1461 - 1562 4,500-STA 212 - 246S-13L 2,000-STA 246 - Door CutoutS-17L 2,000-STA Door Cutout - 434 3,500-STA 654+110 - 720 3,500-STA 1175 - 1197+44 3,500-STA 1197+132 - 1263 4,500-STA 1263 - 1307 4,000-STA 1307 - 1461 4,000-STA 1461 - 1562 4,000-STA 132.5 - 246S-21L 6,000-STA 246 - 434S-26L 2,200-STA 654+110 - 698 3,000-STA 698 - 742 3,000-STA 1065 - 1109 4,000-STA 1197 - 1263 3,000-STA 1263 - 1373 Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 59 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT ### Page 60 Group 11: Table 13 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Repeat Interval (Not to Exceed) Compliance TimeActionCondition 4,000-STA 1502 - 1582 6,000-STA 132.5 - 246S-30L 2,200-STA 434 - 654S-36L 3,000-STA 654 - 654+88 3,000-STA 1197+110 - 1219 2,600-STA 1241 - 1307 2,000-STA 1307 - 1373 3,000-STA 1417 - 1461 2,000-STA 1502 - 1540 3,000-STA 1540 - 1582 2,000-STA 287 - 434S-37L -Before further flight. Contact Boeing for repair instructions and do the repair. If any crack is found. -Before 75,000 to- tal flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin, whichever is later. Contact Boeing for additional inspections or repair instructions. Do the additional in- spections or do the repair. All airplanes with scribe lines using a LRTS pro- gram inspection. Export Controlled ECCN: 9E991 BOEING PROPRIETARY - See page 1 for details Original Issue: November 25, 2008 767-53A0193Revision 3: June 27, 2024 60 of 348 BOEING SERVICE BULLETIN 767-53A0193 ALERTALERT The text continues at https://openairdocs.org/service-documents/boeing/767-53a0193/file/c108a33e7101.md?from=61 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. 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