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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
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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
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Table of Contents
Revision Transmittal Sheet7
S u m m a r y9
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
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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
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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
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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
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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
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
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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
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 Airplane 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
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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
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BOEING SERVICE BULLETIN 767-53A0193
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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.
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