# Boeing Alert Service Bulletin 767-53A0193: Revision 1 - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2009-0642; AD 2010-06-16 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: Boeing Service Bulletin - Pages: 268 - PDF: https://openairdocs.org/files/sha256/a2/84/a284e1a3bfcde22bfb3fcaca560be8cef330df0f3e1e5b720fbfa331becb4770 - Page: https://openairdocs.org/service-documents/boeing/767-53a0193/file/a284e1a3bfcd ## Text Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 268 ALERT ALERT Commercial Airplanes 767 ALERTALERT Service Bulletin Number: 767-53A0193 Original Issue: November 25, 2008 Revision 1: April 09, 2009 ATA System: 5311 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2008 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, BOEING BUSINESS JET, DC-8, DC-9, DC-10, MD-10, MD-11, MD-80, MD-90, the Boeing logo and the Boeing livery are among the trademarks owned by Boeing or its subsidiaries. No intellectual property license (express or implied) is granted in connection with this document or otherwise. ### Page 2 BLANK PAGE Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT BLANK PAGE ### Page 3 Table of Contents Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Table of Contents Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 76 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 76 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 L. Interchangeability and Intermix ability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 77 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 2. Parts and Materials Supplied by the Operator : . . . . . . . . . . . . . . . . . . . . . . 79 3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 D. Parts Necessary to Change Spar es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 80 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 FIGURE 1: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 1) . . . . . . . . . . . 107 FIGURE 2: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 2) . . . . . . . . . . . 109 FIGURE 3: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 3) . . . . . . . . . . . 111 FIGURE 4: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 4) . . . . . . . . . . . 113 FIGURE 5: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 5) . . . . . . . . . . . 115 FIGURE 6: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 6) . . . . . . . . . . . 117 FIGURE 7: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 7) . . . . . . . . . . . 119 FIGURE 8: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 8) . . . . . . . . . . . 121 FIGURE 9: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 9) . . . . . . . . . . . 123 FIGURE 10: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 10) . . . . . . . . . . 125 FIGURE 11: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 11) . . . . . . . . . . 127 ### Page 4 Table of Contents Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 4 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT FIGURE 12: FUSELAGE - SKIN LAP JOINT - ZONE 1 INSPECTION (GROUP 12) . . . . . . . . . 129 FIGURE 13: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 1) . . . . . . . . . . 131 FIGURE 14: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 2) . . . . . . . . . . 133 FIGURE 15: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 3) . . . . . . . . . . 135 FIGURE 16: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 4) . . . . . . . . . . 137 FIGURE 17: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 5) . . . . . . . . . . 139 FIGURE 18: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 6) . . . . . . . . . . 141 FIGURE 19: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 7) . . . . . . . . . . 143 FIGURE 20: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 8) . . . . . . . . . . 145 FIGURE 21: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 9) . . . . . . . . . . 147 FIGURE 22: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 10) . . . . . . . . . 149 FIGURE 23: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 11) . . . . . . . . . 151 FIGURE 24: FUSELAGE - SKIN LAP JOINT - ZONE 2 INSPECTION (GROUP 12) . . . . . . . . . 153 FIGURE 25: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 1) . . . . . . . . . . 155 FIGURE 26: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 2) . . . . . . . . . . 157 FIGURE 27: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 3) . . . . . . . . . . 159 FIGURE 28: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 4) . . . . . . . . . . 161 FIGURE 29: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 5) . . . . . . . . . . 163 FIGURE 30: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 6) . . . . . . . . . . 166 FIGURE 31: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 7) . . . . . . . . . . 169 FIGURE 32: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 8) . . . . . . . . . . 172 FIGURE 33: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 9) . . . . . . . . . . 175 FIGURE 34: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 10) . . . . . . . . . 178 FIGURE 35: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 11) . . . . . . . . . 181 FIGURE 36: FUSELAGE - SKIN LAP JOINT - ZONE 3 INSPECTION (GROUP 12) . . . . . . . . . 183 FIGURE 37: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 1) 185 FIGURE 38: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 2) 187 FIGURE 39: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 3) 189 FIGURE 40: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 4) 191 FIGURE 41: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 5) 193 FIGURE 42: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 6) 195 FIGURE 43: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 7) 197 FIGURE 44: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 8) 199 FIGURE 45: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 9) 201 FIGURE 46: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 10) 203 FIGURE 47: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 11) 205 FIGURE 48: FUSELAGE - EXTERNAL APPROVED REPAIRS - ZONE 1 INSPECTION (GROUP 12) 207 FIGURE 49: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 1) . . . . . . 209 FIGURE 50: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 2) . . . . . . 211 FIGURE 51: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 3) . . . . . . 213 FIGURE 52: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 4) . . . . . . 215 FIGURE 53: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 5) . . . . . . 217 FIGURE 54: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 6) . . . . . . 219 FIGURE 55: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 7) . . . . . . 221 FIGURE 56: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 8) . . . . . . 223 FIGURE 57: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 9) . . . . . . 225 ### Page 5 Table of Contents Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT FIGURE 58: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 10) . . . . . . 227 FIGURE 59: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 11) . . . . . . 229 FIGURE 60: FUSELAGE - EXTERNAL FEATURES - ZONE 2 INSPECTION (GROUP 12) . . . . . . 231 FIGURE 61: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 1) . . . . . . . . . . . . . . . 233 FIGURE 62: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 2) . . . . . . . . . . . . . . . 235 FIGURE 63: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 3) . . . . . . . . . . . . . . . 237 FIGURE 64: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 4) . . . . . . . . . . . . . . . 239 FIGURE 65: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 5) . . . . . . . . . . . . . . . 241 FIGURE 66: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 6) . . . . . . . . . . . . . . . 243 FIGURE 67: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 7) . . . . . . . . . . . . . . . 245 FIGURE 68: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 8) . . . . . . . . . . . . . . . 247 FIGURE 69: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 9) . . . . . . . . . . . . . . . 249 FIGURE 70: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 10) . . . . . . . . . . . . . . 251 FIGURE 71: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 11) . . . . . . . . . . . . . . 253 FIGURE 72: FUSELAGE - DECALS - ZONE 3 INSPECTION (GROUP 12) . . . . . . . . . . . . . . 255 APPENDIX A: SEALANT REMOVAL PROCEDURE FOR EXTERIOR PRESSURIZED FUSELAGE SKIN 257 APPENDIX B: REPORTING SYSTEM - LIMITE D RETURN TO SERVICE PROCEDURE FOR AIRPLANES WITH SCRIBE LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 APPENDIX C: AIRPLANE FUSELAGE SCRIBE LINE MARK SUMMARY TABLES . . . . . . . . . . 265 APPENDIX D: SCRIBE LINE SAMPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267 ### Page 6 Table of Contents Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT BLANK PAGE ### Page 7 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 268 ALERT ALERT Commercial Airplanes 767 ALERTALERT Service Bulletin Number: 767-53A0193 Revision Transmittal Sheet Original Issue: November 25, 2008 Revision 1: April 09, 2009 ATA System: 5311 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 The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. More work is necessary for airplanes that have accomplished skin lap joint inspections as shown in the original issue of this service bulletin. Operators that have incorporated the original issue of this service bulletin for the skin lap joint inspections must review the REASON FOR REVISION information below, and do additional skin lap joint inspections, as necessary, to comply with Revision 1 of this service bulletin. If scribe lines were found as a result of the skin lap joint inspections, but not repaired, and the Limited Return to Service (LRTS) program was elected, operators must review the LRTS Compliance tables for changes in inspection locations and repeat inspection intervals. More work may be required if external approved repair inspections were exempted by Compliance Table 2, Note (g). Operators that have incorporated the original issue of this service bulletin for the external approved repair inspections must review the REASON FOR REVISION information below, and do additional external approved repair inspections, as necessary, to comply with Revision 1 of this service bulletin. More work may be required if external feature inspections were exempted by Compliance Table 3, Note (e). Operators that have incorporated the original issue of this service bulletin for the external feature inspections must review the REASON FOR REVISION information below, and do additional external feature inspections, as necessary, to comply with Revision 1 of this service bulletin. No more work is required for inspections to decals. ### Page 8 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT REASON FOR REVISION This revision is 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. These sections were changed: 1. In Paragraph 1.E., Compliance, Table 1 wa s changed to clarify footnote (f). 2. In Paragraph 1.E., Compliance, Table 2 was changed to cl arify footnotes (f) and (g) and added footnote (h). 3. In Paragraph 1.E., Compliance, Table 3 was changed to clarify footnote (e) and added 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 recommend operators not to blend scribe lines. 8. In Paragraph 3.B., Work Instructio ns, Figures 1 through 36 were changed to reflect changes in affected skin lap joint inspection locations. 9. In Paragraph 3.B., Work Instructions, added a Caut ion to recommend that operators not to blend scribe lines to Figures 1 through 72. Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity paragraph for changes. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes. Pages with no vertical lines have no important changes. REVISION HISTORY Original Issue: November 25, 2008 Revision 1: April 09, 2009 ### Page 9 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 268 ALERT ALERT Commercial Airplanes 767 ALERTALERT Service Bulletin Number: 767-53A0193 Summary Original Issue: November 25, 2008 Revision 1: April 09, 2009 ATA System: 5311 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN 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 767 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. 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. ### Page 10 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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 decal’s 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. Boeing Service Related Problem (SRP) 767-SRP-53-0244 is related to this service bulletin. ACTION 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. ### Page 11 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin 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. MANPOWER MATERIAL INFORMATION Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability. Airplanes Total Task Hours Elapsed Hours 767-200, 767-300, 767-300F, and 767-400ER 340.0 50.0 ### Page 12 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 12 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT DO A DETAILED INSPECTION FOR ANY SCRIBE LINE ALONG SKIN LAP JOINTS, EXTERNAL FEATURES, EXTERNAL APPROVED REPAIRS AND DECALS. IF A SCRIBE LINE IS FOUND, DO A SPECIAL DETAILED INSPECTION FOR ANY CRACK. 1560615 ### Page 13 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 13 of 268 ALERT ALERT Commercial Airplanes 767 ALERTALERT Service Bulletin Number: 767-53A0193 Original Issue: November 25, 2008 Revision 1: April 09, 2009 ATA System: 5311 SUBJECT: FUSELAGE - Skins - Inspections of the Fuselage Skin for Scribe Lines THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. 1. PLANNING INFORMATION A. Effectivity 1. Airplanes 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. GROUP CONFIGURATION DESCRIPTION 1 - 767-200B, 767-200ER, 767-200ER3 airplanes with one Type III over wing exit door and forward large cargo door 2 - 767-200B, 767-200ER3 airplanes with one Type III over wing exit door and forward small cargo door 3 - 767-200ER3 airplanes with two Type III over wing exit doors with forward large cargo door 4 - 767-200B airplanes with two Type III over wing exit doors with forward small cargo door 5 - 767-300ER4 airplanes with forward entry door, Type I emergency exit door, and forward large cargo door ### Page 14 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 14 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Airplane models: 767-200 767-300 767-300F 767-400ER IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER AA 767 LLC (SVX) 1 VE067 ABX AIR (ABX) 2 VA301 VA304–VA305 VA309–VA312 VA314–VA315 VA509 VA803 VA807–VA809 VB101–VB123 VB125 4 VB302 AEROFLOT (ARO) 5 VL896–VL897 VN471–VN472 VS216–VS217 VS321–VS324 9 VS392 AEROMEXICO (AMX) 1 VF071 VF093 VF162 5 VN531 VS211 9V N 1 6 6 AEROSVIT (UKA) 9 VN154–VN155 VN157 VS206 AEROTURBINE (AUB) 2 VB051 VB054–VB055 4 VB321 VB331–VB332 6 - 767-300B3 airplanes with forward entry door, Type I emergency exit door, and forward small cargo door 7 - 767-300ER3 airplanes with forward entry doors, one Type III over wing exit door, and forward large cargo door 8 - 767-300ER4 airplanes with forward entry doors, one Type III over wing exit door, and forward small cargo door 9 - 767-300B3, 767-300ER4 airplanes with two Type III over wing exit doors with forward large cargo door 10 - 767-300B, 767-300B3 airplanes with two Type III over wing exit doors with forward small cargo door 11 - All 767-300F airplanes 12 - All 767-400ER airplanes GROUP CONFIGURATION DESCRIPTION ### Page 15 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 15 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT AIR ALGERIE (ALG) 6 VK131–VK133 AIR ASTANA (AKZ) 5 VL899–VL900 AIR CANADA (ACN) 1 VA701–VA709 VA711–VA719 VB001–VB002 2 VB201–VB202 5 VN541 VN546–VN547 9 VN051–VN054 VN056–VN062 VN751–VN752 VN811–VN812 VN931–VN936 VS381–VS382 VS546–VS549 AIR CHINA (BEJ) 1 VE085–VE086 7 VK161–VK164 9 VS208 VS274 AIR DO (HIA) 9 VS176–VS177 AIR EUROPA (ARE) 9 VS292–VS293 AIR ITALY (RIT) 1 VF001–VF002 5 VL913 AIR MADAGASCAR (MAD) 5V N 5 5 6 9V N 1 6 7 AIR NEW ZEALAND (ANZ) 9 VN653 VN655–VN658 AIR PACIFIC (APC) 9V N 6 7 6 AIR SEYCHELLES (ASY) 1 VE104 4 VB301 9 VL941 VS526 AIR TRANSPORT INTERNATIONAL (TIN) 2 VA313 VA511–VA512 AIR ZIMBABWE (ZMB) 1 VF061–VF062 ALITALIA (ALI) 9 VN424 VN427 ### Page 16 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 16 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT ALITALIA COMPAGNIA AEREA ITALIANA SPA (ILQ) 9 VL701–VL702 VN426 VN732 VN813 VS367 ALL NIPPON AIRWAYS (ANA) 10 VK081–VK113 VR401 11 VT501 9 VN191–VN198 VS721–VS731 AMERICAN AIRLINES (AAL) 2 VA501–VA505 VA514–VA523 VA525 VA527–VA530 9 VN001–VN041 VS196–VS203 VS751–VS759 AMERIJET INTERNATIONAL (AMJ) 2 VA303 VA306 ARAMCO ASSOCIATED COMPANY (RAS) 1V R 0 8 4 ARKEFLY (HXL) 9 VN156 VN164–VN165 ASIANA AIRLINES (AAR) 11 VW851 9 VK143–VK148 VR426 ATLANT-SOYUZ (AYZ) 1V F 0 5 1 AUSTRIAN AIRLINES AG (AUL) 7 VN242–VN243 9 VN671 VS301–VS303 AVIANCA (AVI) 1 VE171–VE172 VF072 VF092 VF161 5V N 5 3 2 9V N 1 5 2 AWAS (AWW) 4 VB325 5 VS308 9V N 6 5 1 BELAIR AIRLINES (BLB) 9 VL932 BELLVIEW AIRLINES (BEB) 1 VE125–VE126 BLUE CITY HOLDING (BCY) 1 VE069 ### Page 17 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 17 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT BLUE PANORAMA AIRLINES (BPA) 10 VN681 7 VN174 VS061 BOEING (TBC) 2 VA001 BOEING CAPITAL CORPORATION (ZMF) 1 VE117 BRISTOL AIR LIMITED (BMD) 2 VA804 BRITISH AIRWAYS (BAB) 5 VN111–VN114 VN118–VN122 VN124–VN127 VN133–VN137 VS246–VS248 CARGOJET AIRWAYS LTD. (WNT) 2 VA510 VA513 CHILEAN AIR FORCE (CHF) 5V N 5 6 1 CHINA EASTERN AIRLINES (CEA) 5 VL871–VL873 CONDOR (CDF) 10 VN683–VN691 CONTINENTAL AIRLINES (CAL) 1 VR051–VR060 12 VQ071–VQ086 CROCUS CORPORATION (CCS) 9 VS825 CSDS AVIATION (CSO) 2 VA506–VA507 DELTA AIR LINES (DAL) 10 VK036 VK039–VK056 VR471–VR472 12 VQ001–VQ021 2 VA302 7 VL753 VN301–VN306 9 VN251–VN276 VS066–VS070 VS073–VS078 VS266–VS273 VS466–VS472 EL AL ISRAEL AIRLINES (ELA) 10 VN682 2 VB281 VB283–VB284 3 VF101–VF102 5V N 5 3 7 9V N 9 7 2 ### Page 18 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 18 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT ERITREAN AIR LINES (ERJ) 1 VE066 ETHIOPIAN AIRLINES (ETH) 5 VL898 VN388 VS306 VS881–VS882 7 VS496–VS497 VS506–VS507 EUROATLANTIC AIRWAYS (MAE) 5V N 5 5 1 V N 5 6 2 9V N 0 5 5 V N 1 5 1 EVERGREEN MAINTENANCE CENTER (EAC) 1 VE061 FIRST AIR (BRS) 2 VA508 FLORIDA WEST INTERNATIONAL (PAI) 11 VR260 FLYGLOBESPAN.COM (FGS) 5 VL891 9 VN654 VS112–VS113 GA TELESIS, LLC (GTG) 4 VB326 GABON AIRLINES (GBO) 2 VA017–VA018 GECAS (GEF) 9 VN731 VS366 GENERIC CUSTOMER/SUPPLIER (XXX) 1 VE002 VE041 VE063 2 VA005 GOL AIRLINES (GOT) 1V F 1 7 1 5 VN557 VN637 VS307 9 VN163 VN225 VN753 GUGGENHEIM AVIATION PARTNERS (GPR) 9V N 1 5 3 GULF AIR (GUL) 7V N 3 1 0 V N 3 1 4 HAINAN AIRLINES (HNA) 5 VS426–VS428 ### Page 19 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 19 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT HAWAIIAN AIRLINES (HWI) 10 VK031–VK034 5 VN381 VS309–VS311 8 VN171–VN173 9 VS821–VS824 VS841–VS843 HEWA BORA AIRWAYS (EXD) 1 VE021 HIS MAJESTY THE SULTAN'S FLIGHT (BWN) 1V F 1 8 0 ICELANDAIR (ICE) 7V N 2 1 1 9V N 1 5 8 ILFC (ILF) 5 VL893 7V N 6 3 5 9 VS401 INTEGRATED DEFENSE SYSTEMS (BAC) 1 VV001 2 VA806 ITALIAN AIR FORCE (ZSV) 1V R 0 8 6 ITOCHU CORPORATION (CIT) 2 VF181–VF184 JAL INTERNATIONAL (JAL) 10 VK001–VK016 VR441 2 VB371–VB373 9 VK021–VK022 VK181 VK186 VR461 VS701–VS711 JETAIRFLY (TLB) 7V N 2 3 4 JORDAN AVIATION (JOR) 4 VB327 VB329–VB330 KALAIR (BERMUDA) (KLB) 7V N 3 1 1 KAM AIR (KMC) 2 VA019 KENYA AIRWAYS (KEN) 5 VN421 VS331–VS333 7 VL003 9 VK141 ### Page 20 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 20 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT KRASAIR (ZXD) 1 VE001 VE022–VE023 LAN AIRLINES (LAN) 11 VR251 VR256–VR259 9 VL703 VN063–VN064 VN168 VN966–VN971 VS111 VS131–VS133 LOT POLISH AIRLINES (LOT) 7V N 2 3 3 9 VN291–VN293 VN652 MALEV HUNGARIAN AIRLINES LTD. (HGA) 1V F 1 7 2 MARTINAIR HOLLAND (MTH) 5V N 3 8 5 9 VN221–VN224 VN672 MEXICANA (CMA) 1 VF041–VF042 7 VL001–VL002 MID EAST JET (SKL) 1V F 2 5 1 NEOS (NEO) 5 VL892 VL894 NORTH AMERICAN AIRLINES (NNA) 5 VL895 VL911 VN922 VS316 7 VL755 VN634 OCEANAIR AIRLINES (OAL) 5V N 3 7 6 9V N 4 9 5 V N 5 0 0 PACE AIRLINES (PIE) 2 VB053 PHOENIX AIRCRAFT LEASING, INC. (PLB) 2 VA810 PRESIDENTIAL FLIGHT (ABD) 9 VS391 PRIVATAIR (PTS) 5 VS137 PTC AEROSPACE (PTE) 2 VB282 ### Page 21 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT QANTAS (QAN) 5 VN115–VN117 VN123 VN130–VN132 9 VN081–VN099 VS186–VS187 VS486 ROSSIYA RUSSIAN AIRLINES (STG) 5 VS261–VS263 ROYAL AIR MAROC (RAM) 5 VS336–VS337 7V N 6 3 6 9 VS291 ROYAL BRUNEI AIRLINES (RBA) 5 VN372 VN382–VN384 VN386–VN387 RYAN INTERNATIONAL AIRLINES (RYN) 10 VK035 VK038 7 VL011 S7 AIRLINES (SBR) 5 VN638 VS136 9V N 4 3 6 SAFI AIRWAYS (FFI) 1 VE084 SHANGHAI AIRLINES (SHA) 9 VK171 VR421–VR423 VS207 SKY HOLDING COMPANY (PSH) 9 VL931 SKY KING (SKN) 1 VE064 SKYMARK AIRLINES (SKM) 9 VS231 VS861 SKYSTAR (SYW) 2 VA008 VA011–VA012 VA020 SMARTLYNX AIRLINES (LCH) 5 VN536 VN542 SOJITZ CORPORATION (SOJ) 7 VN231–VN232 STAR AIR (SBJ) 1 VE101–VE103 2 VA307–VA308 VB441–VB444 4 VB323 VB328 ### Page 22 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STATE AIR COMPANY "BERKUT" (ORE) 1V R 0 8 1 TAA (TNL) 2 VA002–VA004 VA007 VA014–VA015 TAM (TPR) 9 VN422–VN423 VN425 TAMPA CARGO (TMP) 1 VE121–VE124 TEEBAH AIRLINES (EBH) 1 VA710 THOMAS COOK AIRLINES UK (JMA) 5 VN951–VN953 THOMSON AIRWAYS (BRI) 5 VL914 VN921 VS051–VS056 7 VL751–VL752 VL754 VN791–VN792 TRANSAERO AIRLINES (TRX) 1 VE116 VE118 VE143 5 VN371 VN631–VN633 7 VN307–VN309 VN313 TRANSATLANTIC INTL AIRLINES (TIB) 2 VA016 TUIFLY NORDIC (TNS) 5 VL912 TURKMENISTAN AIRLINES (TUE) 5 VS891 UNITED AIR LINES (UAL) 9 VN491–VN494 VN496–VN499 VN501–VN513 VS091–VS104 UPS (UPS) 11 VR201–VR211 VW701–VW721 US AIRWAYS (USA) 1 VE141–VE142 VE144–VE149 VE151–VE152 UZBEKISTAN AIRWAYS (UZB) 5 VL806–VL807 9 VS844 VS896 VISION AIR (VEG) 2 VA006 VA009–VA010 ### Page 23 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 23 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT VIVA MACAU (VMC) 1V F 0 9 1 9 VK142 WELLS FARGO (FSB) 7 VL004–VL006 WELLS FARGO BANK (ZWR) 1 VE068 WEST DOVER LLC (WDR) 10 VK037 YONA (IOP) 7V N 3 1 2 IDENTIFICATION BY VARIABLE NUMBER Variable Group VA001–VA020 2 VA301–VA315 2 VA501–VA530 2 VA701–VA719 1 VA801–VA810 2 VB001–VB002 1 VB051–VB055 2 VB101–VB125 2 VB201–VB202 2 VB251–VB253 2 VB281–VB284 2 VB301–VB302 4 VB321–VB332 4 VB371–VB373 2 VB401 1 VB441–VB444 2 VE001–VE003 1 VE021–VE023 1 VE041–VE043 1 VE061–VE069 1 VE083–VE086 1 VE101–VE104 1 VE116–VE118 1 VE121–VE126 1 VE141–VE152 1 ### Page 24 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT VE171–VE172 1 VF001–VF002 1 VF041–VF042 1 VF051 1 VF061–VF062 1 VF071–VF072 1 VF091–VF093 1 VF101–VF102 3 VF161–VF162 1 VF171–VF172 1 VF180 1 VF181–VF184 2 VF251 1 VK001–VK016 10 VK021–VK022 9 VK031–VK056 10 VK081–VK113 10 VK131–VK133 6 VK141–VK148 9 VK161–VK164 7 VK171 9 VK181 9 VK186 9 VL001–VL006 7 VL011 7 VL701–VL703 9 VL751–VL755 7 VL806–VL807 5 VL871–VL873 5 VL891–VL900 5 VL911–VL914 5 VL931–VL932 9 VL941 9 VN001–VN041 9 VN051–VN064 9 VN081–VN099 9 VN111–VN127 5 VN130–VN137 5 VN151–VN158 9 Variable Group ### Page 25 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 25 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT VN163–VN168 9 VN171–VN173 8 VN174 7 VN191–VN198 9 VN211–VN212 7 VN221–VN225 9 VN231–VN234 7 VN241–VN243 7 VN251–VN276 9 VN291–VN293 9 VN301–VN314 7 VN371–VN372 5 VN376 5 VN381–VN388 5 VN421 5 VN422–VN427 9 VN436 9 VN471–VN472 5 VN491–VN513 9 VN531–VN532 5 VN536–VN537 5 VN541–VN542 5 VN546–VN547 5 VN551 5 VN556–VN557 5 VN561–VN562 5 VN631–VN633 5 VN634–VN636 7 VN637–VN638 5 VN651–VN658 9 VN671–VN672 9 VN676 9 VN681–VN691 10 VN731–VN732 9 VN751–VN753 9 VN791–VN792 7 VN811–VN813 9 VN921–VN922 5 VN931–VN936 9 Variable Group ### Page 26 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 26 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT VN951–VN953 5 VN966–VN972 9 VQ001–VQ021 12 VQ071–VQ086 12 VR051–VR060 1 VR081 1 VR084 1 VR086 1 VR201–VR211 11 VR251 11 VR256–VR260 11 VR401 10 VR421–VR423 9 VR426 9 VR441 10 VR461 9 VR471–VR472 10 VS051–VS056 5 VS061 7 VS066–VS070 9 VS073–VS078 9 VS091–VS104 9 VS111–VS113 9 VS131–VS133 9 VS136–VS137 5 VS176–VS177 9 VS186–VS187 9 VS196–VS203 9 VS206–VS208 9 VS211 5 VS216–VS217 5 VS231 9 VS246–VS248 5 VS261–VS263 5 VS266–VS274 9 VS291–VS293 9 VS301–VS303 9 VS306–VS311 5 VS316 5 Variable Group ### Page 27 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 27 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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. VS321–VS324 5 VS331–VS333 5 VS336–VS337 5 VS366–VS367 9 VS381–VS382 9 VS391–VS392 9 VS401 9 VS426–VS428 5 VS466–VS472 9 VS486 9 VS496–VS497 7 VS506–VS507 7 VS526 9 VS546–VS549 9 VS701–VS711 9 VS721–VS731 9 VS751–VS759 9 VS821–VS825 9 VS841–VS844 9 VS861 9 VS881–VS882 5 VS891 5 VS896 9 VT501 11 VV001 1 VW701–VW721 11 VW851 11 Variable Group ### Page 28 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 28 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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 767 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. 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 decal’s 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. Boeing Service Related Problem (SRP) 767-SRP-53-0244 is related to this service bulletin. This revision is 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. These sections were changed: 1. In Paragraph 1.E., Compliance, Table 1 wa s 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. ### Page 29 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 29 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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. 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 1 - More work is necessary for airplanes that have accomplished skin lap joint inspections as shown in the original issue of this service bulletin. Operators that have incorporated the original issue of this service bulletin for the skin lap joint inspections must review the REASON FOR REVISION information below, and do additional skin lap joint inspections, as necessary, to comply with Revision 1 of this service bulletin. ### Page 30 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT If scribe lines were found as a result of the skin lap joint inspections, but not repaired, and the Limited Return to Service (LRTS) program was elected, operators must review the LRTS Compliance tables for changes in inspection locations and repeat inspection intervals. More work may be required if external approved repair inspections were exempted by Compliance Table 2, Note (g). Operators that have incorporated the original issue of this service bulletin for the external approved repair inspections must review the REASON FOR REVISION information below, and do additional external approved repair inspections, as necessary, to comply with Revision 1 of this service bulletin. More work may be required if external feature inspections were exempted by Compliance Table 3, Note (e). Operators that have incorporated the original issue of this service bulletin for the external feature inspections must review the REASON FOR REVISION information below, and do additional external feature inspections, as necessary, to comply with Revision 1 of this service bulletin. No more work is required for inspections to decals. E. Compliance The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. 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 —D e c a l s 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 are used to show the LRTS repeat inspection intervals for the four (4) areas to be inspected. NOTE: Pay close attention to the Group Number and Inspection Area in the title of the table. 3. Table 21 is used to show the repeat inspection intervals for Accomplishment Instructions Paragraph 3.B - Part 8. ### Page 31 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 31 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Group 1-12: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) All Airplanes Skin Lap Joints Zone 1 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) (g) Before 25,000 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - All Airplanes Skin Lap Joints Zone 2 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) (g) Before 37,500 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - All Airplanes Skin Lap Joints Zone 3 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) (g) Before 50,000 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - No scribe line or damage is found.(c) No further inspections are required. (b) --- Any scribe line is found. (c) Measure the scribe line depth as given in Accomplishment Instructions Paragraph 3.B - Part 4. Before further flight. -- Scribe line is found less than 0.001 inch deep. (c) No further inspections are required. (b) --- 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) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- Or Contact Boeing for repair instructions and do the repair. Before further flight. -- ### Page 32 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- And Contact Boeing for repair instructions and do the repair. Before further flight. -- 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. Do the repeat inspections as given in Accomplishment Instructions Paragraph 3.B - Part 6. Before repeat intervals in Tables 5-14. - Refer to the LRTS Tables 5- 14 for repeat intervals. Or Contact Boeing for repair instructions and do the repair. Before further flight. -- If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. -- All airplanes with scribe line using a LRTS program inspection. Contact Boeing for additional inspections or repair. Before 50,000 total flight cycles. Within 4,000 flight cycles after the original issue date on this service bulletin. - (a) First scribe line opportunity is provided by mainte nance records. Adjust the compliance time as given below: 1. If record of first paint since delivery is available, th en add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not ava ilable, add 6,000 flight cycles 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. (c) Refer to Accomplishment Instructions Paragrap h 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. Group 1-12: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 33 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 33 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT (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 seal ant 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 pr eviously 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 as given in this table. Group 1-12: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) All Airplanes External Approved Repairs - 20 inches or longer on any side Zone 1 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) (g) (h) Before 25,000 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - All Airplanes External Approved Repairs - Less than 20 inches on all sides Zone 1 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) (g) (h) Before 25,000 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - No scribe line or damage is found.(c) No further inspections are required.(b) -- - Any scribe line is found. (c) Measure the scribe line depth as given in Accomplishment Instructions Paragraph 3.B - Part 4. Before further flight. -- Scribe line is found less than 0.001 inch deep. (c) No further inspections are required. (b) -- - Group 1-12: Table 1 - Skin Lap Joint - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 34 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 34 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- Or Contact Boeing for repair instructions and do the repair. Before further flight. -- Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- And Contact Boeing for repair instructions and do the repair. Before further flight. -- 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. Do the repeat inspections as given in Accomplishment Instructions Paragraph 3.B - Part 6. Before the compliance times in Table 15. - Refer to the LRTS Table 15 for repeat intervals. Or Contact Boeing for repair instructions and do the repair. Before further flight. -- If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. -- All airplanes with scribe line using a LRTS program inspection. Contact Boeing for additional inspections or repair. Before 50,000 total flight cycles. Within 4,000 flight cycles after the original issue date on this service bulletin. - (a) First scribe line opportunity is provided by main tenance records. Adjust the compliance time as given below: 1. If record of first paint since deliv ery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not av ailable, add 6,000 flight cycles 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. Group 1-12: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 35 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT (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 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. (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 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. (f) 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. (g) For each repair, if operator’s records show that th e 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. (h) 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 as given in this table. Group 1-12: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) All Airplanes External Features Zone 2 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) (e) (f) Before 37,500 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - No scribe line or damage is found.(c) No further inspections are required.(b) --- Any scribe line is found. (c) Measure the scribe line depth as given in Accomplishment Instructions Paragraph 3.B - Part 4. Before further flight. -- Scribe line is found less than 0.001 inch deep. (c) No further inspections are required. (b) --- Group 1-12: Table 2 - External Approved Repairs - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 36 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 36 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT 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) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- Or Contact Boeing for repair instructions and do the repair. Before further flight. -- Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) Do High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- And Contact Boeing for repair instructions and do the repair. Before further flight. -- 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. Do the repeat inspections as given in Accomplishment Instructions Paragraph 3.B - Part 6. Before repeat intervals in Tables 16-19. - Refer to the LRTS Tables 16-19 for repeat intervals. Or Contact Boeing for repair instructions and do the repair. Before further flight. -- If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. -- All airplanes with scribe line using a LRTS program inspection. Contact Boeing for additional inspections or repair. Before 50,000 total flight cycles. Within 4,000 flight cycles after the original issue date on this service bulletin. - (a) First scribe line opportunity is provided by main tenance records. Adjust the compliance time as given below: 1. If record of first paint since deliv ery is available, then add the airplane flight cycles at first paint to the threshold. 2. If record of first paint since delivery is not av ailable, add 6,000 flight cycles 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. (c) Refer to Accomplishment Instru ctions Paragraph 3.B for identification of a typical scribe line. Group 1-12: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 37 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 37 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT (d) 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. (e) 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. (f) If a decal is installed, or was pr eviously 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 as given in this table. Group 1-12: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) All Airplanes Decals Zone 3 Do a detailed inspection for any scribe line using the tables as given in the Accomplishment Instructions Paragraph 3.B - Part 2. (d) Before 50,000 total flight cycles plus first scribe line opportunity. (a) Within 4,000 flight cycles after the original issue date on this service bulletin. - No scribe line or damage is found.(c) No further inspections are required. - - - Any scribe line is found. (c) Measure the scribe line depth as given in Accomplishment Instructions Paragraph 3.B - Part 4. Before further flight. -- Scribe line is found less than 0.001 inch deep. (c) No further inspections are required. - - - 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) Do High Frequency Eddy Current (HFEC) special detailed inspection for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- Or Contact Boeing for repair instructions and do the repair. Before further flight. -- Group 1-12: Table 3 - External Features - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 38 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Scribe line is found within the limits of a typical scribe line and more than 0.006 inch deep. (c) Do High Frequency Eddy Current (HFEC) special detailed inspection for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 5. Before further flight. -- And Contact Boeing for repair instructions and do the repair. Before further flight. -- 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. Do the repeat inspections as given in Accomplishment Instructions Paragraph 3.B - Part 6. Before compliance times in Table 20. - Refer to the LRTS Table 20 for repeat intervals. Or Contact Boeing for repair instructions and do the repair. Before further flight. -- If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. -- All airplanes with scribe line using a LRTS program inspection. Contact Boeing for additional inspections or repair. Before 50,000 total flight cycles. Within 4,000 flight cycles after the original issue date on this service bulletin. - (a) First scribe line opportunity is provided by mainte nance records. Adjust the compliance time as given below. Operator is to use the lowest of the three below adjustments to the threshold in determining first scribe line opportunity. 1. If record of first paint since delivery is available, th en add the airplane flight cycles at first paint to the threshold. 2. If record of first decal installati on 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. (b) Removed at Revision 1 of this Service Bulletin. Group 1-12: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 39 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 39 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT (c) Refer to Accomplishment Instructions Paragra ph 3.B for identification of a typical scribe line. (d) Decal inspections are not required: If the operator’s records show the airplane has never had decals installed in the area of inspection since delivery. and If operator’s records show that the airplane has never been stripped or repainted since delivery from Boeing. (e) Removed at Revision 1 of this Service Bulletin. Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 456 - 2,000 STA 456 - 500 - 2,300 STA 632 - 676 - 2,000 STA 676 - 786 - 2,300 STA 1395 - 1540 - 2,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 456 - 3,000 STA 654 - 742 - 3,000 STA 1109 - 1175 - 3,000 STA 1175 - 1219 - 4,300 STA 1417 - 1582 - 4,300 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 676 - 764 - 4,000 STA 1087 - 1241 - 4,300 Group 1-12: Table 4 - Decals - Fuselage Skin Scribe Line Inspection Condition Action Compliance Time (Whichever Occurs Later) Repeat Interval (Not to Exceed) ### Page 40 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 40 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1417 - 1461 - 4,000 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 764 - 3,400 STA 1087 - 1373 - 3,500 STA 1417 - 1461 - 3,000 S-2R STA 434 - 720 - 3,000 STA 720 - 764 - 3,500 STA 1417 - 1562 - 2,500 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 786 - 3,300 STA 1087 - 1373 - 3,400 STA 1373 - 1461 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 632 - 3,500 STA 654 - 742 - 2,600 STA 742 - 786 - 3,000 STA 1065 - 1263 - 3,800 STA 1263 - 1307 - 3,400 STA 1307 - 1329 - 3,000 STA 1329 - 1461 - 3,000 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 588 - 3,500 STA 588 - 632 - 2,400 STA 632 - 764 - 3,300 STA 1153 - 1307 - 3,500 STA 1307 - 1395 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 764 - 2,200 STA 1263 - 1307 - 3,200 STA 1307 - 1351 - 2,200 STA 1417 - 1461 - 3,000 Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 41 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 41 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1480 - 1540 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 500 - 2,000 STA 500 - 544 - 3,500 STA 654 - 786 - 2,500 STA 1395 - 1540 - 2,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 478 - 2,800 STA 676 - 742 - 3,000 STA 1109 - 1175 - 3,000 STA 1175 - 1219 - 4,300 STA 1417 - 1582 - 4,300 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 500 - 4,000 Group 1, 3: Table 5 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 42 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 42 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 676 - 764 - 4,000 STA 1087 - 1241 - 4,300 STA 1417 - 1461 - 4,000 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 764 - 3,400 STA 1087 - 1373 - 3,500 STA 1417 - 1461 - 3,000 S-2R STA 434 - 720 - 3,000 STA 720 - 764 - 3,500 STA 1417 - 1562 - 2,500 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 786 - 3,300 STA 1087 - 1373 - 3,400 STA 1373 - 1461 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 632 - 3,500 STA 654 - 742 - 2,600 STA 742 - 786 - 3,000 STA 1065 - 1263 - 3,800 STA 1263 - 1307 - 3,400 STA 1307 - 1329 - 3,000 STA 1329 - 1461 - 3,000 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 588 - 3,500 STA 588 - 632 - 2,400 STA 632 - 764 - 3,300 STA 1153 - 1307 - 3,500 STA 1307 - 1395 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 764 - 2,200 STA 1263 - 1307 - 3,200 Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 43 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 43 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1307 - 1351 - 2,200 STA 1417 - 1461 - 3,000 STA 1480 - 1540 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 478 - 3,000 STA 654 - 698 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1562 - 2,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 456 - 3,800 STA 654+22 - 654+88 - 3,800 STA 654+88 - 698 - 3,000 STA 698 - 764 - 5,000 STA 1153 - 1219 - 4,000 Group 2, 4: Table 6 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 44 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 44 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 456 - 4,300 STA 1197+22 - 1197+132 - 3,000 STA 1395 - 1461 - 4,000 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 654 - 3,400 STA 654+110 - 675 - 4,800 STA 1197+22 - 1197+132 - 2,000 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,400 STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 1197+22 - 1197+132 - 2,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 676 - 720 - 3,500 STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 45 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 45 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654+88 - 2,000 STA 654+88 - 676 - 3,000 STA 676 - 742 - 4,500 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 764 - 3,000 STA 1197+88 - 1219 - 4,000 STA 1241 - 1307 - 3,000 STA 1307 - 1351 - 2,000 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 5: Table 7 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 46 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 46 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 522 - 3,000 STA 566 - 698 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1562 - 2,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 478 - 3,000 STA 654+22 - 654+88 - 4,000 STA 654+88 - 698 - 3,000 STA 698 - 764 - 5,000 STA 1153 - 1219 - 4,000 STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 522 - 4,000 STA 1197+22 - 1197+132 - 3,000 STA 1395 - 1461 - 4,000 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 654+110 - 676 - 4,500 STA 1197+22 - 1197+132 - 2,000 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,400 STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 ### Page 47 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 47 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 654+121 - 764 - 5,000 STA 1197+22 - 1197+132 - 2,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 676 - 720 - 4,000 STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654+88 - 2,000 STA 654+88 - 676 - 3,000 STA 676 - 742 - 5,000 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 764 - 3,000 STA 1197+88 - 1219 - 4,000 STA 1241 - 1307 - 3,000 Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 48 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 48 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1307 - 1351 - 2,000 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 478 - 3,000 STA 654 - 698 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1502 - 2,000 STA 1518 - 1562 - 3,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 456 - 3,800 STA 654+22 - 654+88 - 3,800 STA 654+88 - 698 - 3,000 STA 698 - 764 - 5,000 Group 6: Table 8 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 49 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 49 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1175 - 1219 - 4,000 STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 456 - 4,300 STA 1109 - 1197+22 - 3,000 STA 1395 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 654 - 3,400 STA 654+110 - 676 - 4,800 STA 1087 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,300 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 1109 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,500 STA 1197+132 - 1241 - 4,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 676 - 720 - 3,500 STA 1109 - 1197+22 - 3,000 Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 50 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 50 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654+88 - 2,000 STA 654+88 - 676 - 3,000 STA 676 - 742 - 4,500 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 764 - 3,000 STA 1241 - 1307 - 3,000 STA 1307 - 1351 - 2,200 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 7: Table 9 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 51 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 51 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 522 - 3,000 STA 566 - 698 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1502 - 2,000 STA 1518 - 1562 - 3,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 478 - 3,000 STA 654+22 - 654+88 - 4,000 STA 654+88 - 698 - 3,000 STA 698 - 764 - 5,000 STA 1175 - 1219 - 4,000 STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 522 - 4,000 STA 1109 - 1197+22 - 3,000 STA 1395 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 654+110 - 676 - 4,500 STA 1087 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,300 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,500 ### Page 52 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 52 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654 - 3,500 STA 654+121 - 764 - 5,000 STA 1109 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,500 STA 1197+132 - 1241 - 4,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 676 - 720 - 4,000 STA 1109 - 1197+22 - 3,000 STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654+88 - 2,000 STA 654+88 - 676 - 3,000 STA 676 - 742 - 5,000 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 53 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 53 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 765 - 3,000 STA 1241 - 1307 - 3,000 STA 1307 - 1351 - 2,200 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 478 - 3,000 STA 654 - 654+110 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1502 - 2,000 STA 1518 - 1562 - 3,000 S-30R STA 132.5 - 246 - 6,000 Group 8: Table 10 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 54 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 54 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT S-26R STA 246 - 434 - 6,000 STA 434 - 456 - 3,800 STA 654+22 - 654+88 - 4,500 STA 654+88 - 698 - 3,500 STA 698 - 764 - 4,200 STA 1175 - 1219 - 4,000 STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 456 - 4,300 STA 654+44 - 720 - 3,000 STA 1109 - 1197+22 - 3,000 STA 1395 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 632 - 3,400 STA 632 - 654+66 - 4,500 STA 654+66 - 654+121 - 3,500 STA 1087 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,300 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654+121 - 3,500 STA 720 - 764 - 5,000 STA 1109 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,500 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 55 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 55 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1197+132 - 1241 - 4,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 654 - 654+66 - 3,500 STA 654+66 - 720 - 3,000 STA 1109 - 1197+22 - 3,000 STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654 - 2,000 STA 654 - 676 - 3,500 STA 676 - 742 - 5,000 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 764 - 3,000 STA 1241 - 1307 - 3,000 STA 1307 - 1351 - 2,200 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 56 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 56 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 522 - 3,000 STA 566 - 698 - 3,000 STA 1197+66 - 1219 - 3,000 STA 1373 - 1417 - 3,500 STA 1417 - 1502 - 2,000 STA 1518 - 1562 - 3,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 478 - 3,000 STA 654+22 - 654+88 - 4,500 STA 654+88 - 698 - 3,500 STA 698 - 764 - 4,500 STA 1175 - 1219 - 4,000 STA 1417 - 1582 - 4,500 S-21R STA 132.5 - 246 - 4,000 Group 9: Table 11 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 57 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 57 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 522 - 4,500 STA 654+44 - 720 - 3,000 STA 1109 - 1197+22 - 3,000 STA 1395 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 632 - 3,500 STA 632 - 654+66 - 4,500 STA 654+66 - 654+121 - 3,500 STA 1087 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,300 STA 1241 - 1373 - 3,500 STA 1417 - 1461 - 3,500 STA 1562 - 1582 - 4,500 S-2R STA 434 - 654+44 - 3,000 STA 654+44 - 654+88 - 3,500 STA 654+88 - 720 - 4,000 STA 1241 - 1307 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 434 - 654+121 - 3,500 STA 720 - 764 - 5,000 STA 1109 - 1197+44 - 3,000 STA 1197+44 - 1197+132 - 2,500 STA 1197+132 - 1241 - 4,000 STA 1241 - 1373 - 3,500 STA 1562 - 1582 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 434 - 654 - 3,500 STA 654 - 654+66 - 3,500 STA 654+66 - 720 - 3,000 Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 58 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 58 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1109 - 1197+22 - 3,000 STA 1197+110 - 1219 - 3,500 STA 1219 - 1263 - 4,000 STA 1307 - 1461 - 3,000 STA 1562 - 1582 - 4,500 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 434 - 610 - 3,500 STA 610 - 654 - 2,000 STA 654 - 676 - 3,500 STA 676 - 742 - 5,000 STA 1153 - 1285 - 4,000 STA 1285 - 1373 - 3,000 STA 1502 - 1582 - 4,500 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,400 STA 654 - 654+88 - 2,000 STA 654+88 - 654+121 - 3,300 STA 698 - 764 - 3,000 STA 1241 - 1307 - 3,000 STA 1307 - 1351 - 2,200 STA 1351 - 1461 - 3,000 STA 1502 - 1582 - 2,000 S-37L STA 287 - 434 - 2,000 If any crack is found. Contact Boeing for repair instructions and do the repair. Before further flight. - All airplanes with scribe lines using a LRTS program inspection. Contact Boeing for repair instructions and do the repair. Before 50,000 total flight cycles or within 4,000 flight cycles after the original issue date on this service bulletin. - Group 10: Table 12 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) ### Page 59 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 59 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT Group 11: Table 13 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) All Airplanes with Scribe Lines using a Limited Return To Service (LRTS) Program Skin Lap Joints Do a detailed inspection, High Frequency Eddy Current (HFEC) and/or Ultrasonic (UT) special detailed inspections for any crack as given in the Accomplishment Instructions Paragraph 3.B - Part 6 for the skin lap joint areas that follow: Stringer Location Station Location From - To Flight Cycles S-37R STA 287 - 434 - 2,000 S-36R STA 434 - 500 - 4,000 STA 654 - 654+121 - 4,000 STA 1417 - 1582 - 2,000 S-30R STA 132.5 - 246 - 6,000 S-26R STA 246 - 434 - 6,000 STA 434 - 456 - 4,000 STA 654+22 - 654+110 - 4,500 STA 654+110 - 742 - 3,000 STA 1153 - 1197+66 - 4,000 STA 1417 - 1582 - 5,000 S-21R STA 132.5 - 246 - 4,000 S-17R STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 654+66 - 676 - 3,000 STA 676 - 720 - 4,000 STA 1175 - 1197+22 - 4,000 STA 1197+22 - 1197+66 - 3,000 STA 1395 - 1461 - 3,500 STA 1461 - 1562 - 4,000 S-13R STA 212 - 246 - 4,500 S-8R STA 246 - 434 - 4,000 STA 434 - 632 - 3,400 STA 632 - 654+44 - 4,500 STA 1153 - 1197+88 - 3,000 STA 1197+88 - 1219 - 3,000 STA 1241 - 1373 - 3,500 STA 1417 - 1562 - 3,500 S-2R STA 1241- 1285 - 5,000 STA 1285 - 1351 - 3,000 ### Page 60 Original Issue: November 25, 2008 Revision 1: April 09, 2009 767-53A0193 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 60 of 268 BOEING SERVICE BULLETIN 767-53A0193 ALERT ALERT STA 1351 - 1417 - 4,000 STA 1417 - 1582 - 3,000 BL 0 STA 188.9 - 246 - 6,000 S-8L STA 246 - 434 - 4,000 STA 1175 - 1197+132 - 2,000 STA 1219 - 1373 - 3,500 STA 1417 - 1461 - 4,000 STA 1461 - 1562 - 4,000 S-13L STA 212 - 246 - 4,500 S-17L STA 246 - Door Cutout - 2,000 STA Door Cutout - 434 - 2,000 STA 654+110 - 720 - 3,500 STA 1175 - 1197+44 - 3,500 STA 1197+132 - 1263 - 3,500 STA 1263 - 1307 - 4,500 STA 1307 - 1461 - 4,000 STA 1461 - 1562 - 4,000 S-21L STA 132.5 - 246 - 4,000 S-26L STA 246 - 434 - 6,000 STA 654+110 - 698 - 2,200 STA 698 - 742 - 3,000 STA 1065 - 1109 - 3,000 STA 1197 - 1263 - 4,000 STA 1263 - 1373 - 3,000 STA 1502 - 1582 - 4,000 S-30L STA 132.5 - 246 - 6,000 S-36L STA 434 - 654 - 2,200 STA 654 - 654+88 - 3,000 STA 1197+110 - 1219 - 3,000 STA 1241 - 1307 - 2,600 STA 1307 - 1373 - 2,000 STA 1417 - 1461 - 3,000 STA 1502 - 1540 - 2,000 STA 1540 - 1582 - 3,000 Group 11: Table 13 - Skin Lap Joints - Limited Return To Service Repeat Inspection Intervals Condition Action Compliance Time Repeat Interval (Not to Exceed) The text continues at https://openairdocs.org/service-documents/boeing/767-53a0193/file/a284e1a3bfcd.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. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.