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Commercial Airplanes 737 Service Bulletin Number: 737-53A1177 Original Issue: November 08, 1994 Revision 7: June 14, 2013 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Repair Methods For Cracks In Lower Skins At Lap Joints and Window Corners Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 1994 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 1 of 598
8.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 2 of 598 BOEING SERVICE BULLETIN 737-53A1177
BLANK PAGE
Table of Contents
Revision Transmittal Sheet7
Summary ..................................................... 1 3
1. PLANNING INFORMATION ........................................ 1 7 A. Effectivity ............................................... 1 7
1. Airplanes ............................................ 1 7
2. Spares Affected ........................................ 3 8 B. Concurrent Requirements ...................................... 3 8 C. Reason ................................................ 3 8 D. Description .............................................. 4 3 E. Compliance .............................................. 4 8 F. Approval ............................................... 7 7 G. Manpower .............................................. 8 0 H. Weight and Balance Changes .................................... 8 4 I. Electrical Load Data ......................................... 8 4 J. References .............................................. 8 4
1. Existing Data: ......................................... 8 4
2. Data Supplied with this Service Bulletin: ........................... 8 5
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 9 0
4. Process Data: ......................................... 9 1 K. Publications Affected ........................................ 9 1 L. Interchangeability and Intermixability of Parts ........................... 9 1 M. Software Accomplishment Summary ................................ 9 1
2. MATERIAL INFORMATION ........................................ 9 3 A. Material - Price and Availability ................................... 9 3 B. Industry Support Information .................................... 9 6 C. Parts Necessary for Each Airplane ................................. 9 7
1. Kits/Parts: ........................................... 9 7
2. Parts and Materials Supplied by the Operator: ....................... 1 3 2
3. Parts Modified and Reidentified: ............................... 1 3 7
4. Parts Removed and Not Replaced: ............................. 1 3 7 D. Parts Necessary to Change Spares ................................ 1 3 7 E. Special Tooling - Price and Availability .............................. 1 3 7 F. Special Tooling Necessary to do this Service Bulletin ...................... 1 3 8
3. ACCOMPLISHMENT INSTRUCTIONS ................................. 1 3 9 A. GENERAL INFORMATION .................................... 1 3 9 B. WORK INSTRUCTIONS ...................................... 1 4 1 FIGURE 1: AREA TO INSPECT IN ACCORDANCE WITH 737 NDT 53-30-00, FIGURE 5 [Group 2-17, 19-21, 23-27] ......................................... 2 1 9 FIGURE 2: THIS FIGURE IS DELETED AT REVISION 7 ........................ 2 2 0 FIGURE 3: THIS FIGURE IS DELETED AT REVISION 7 ........................ 2 2 1 FIGURE 4: THIS FIGURE IS DELETED AT REVISION 7 ........................ 2 2 2 FIGURE 5: THIS FIGURE IS DELETED AT REVISION 7 ........................ 2 2 3 FIGURE 6: THIS FIGURE IS DELETED AT REVISION 7 ........................ 2 2 4 FIGURE 7: INSPECT THE LAP JOINT - GROUP 1 AIRPLANES [Group 1] .............. 2 2 5 FIGURE 8: INSPECT THE LAP JOINT - EXTERNAL METHOD .................... 2 2 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 3 of 598 BOEING SERVICE BULLETIN 737-53A1177
FIGURE 9: INSPECT THE LAP JOINT AND LAP JOINT MODIFICATION (REPAIR) - INTERNAL INSPECTION [Group 2-28] .................................. 2 2 9 FIGURE 10: S-4 LAP JOINT MODIFICATION (REPAIR) [Group 2-8] .................. 2 3 3 FIGURE 11: S-10 LAP JOINT MODIFICATION (REPAIR) [Group 2-8] ................. 2 6 3 FIGURE 12: S-14 LAP JOINT MODIFICATION (REPAIR) [Group 2-8] ................. 2 8 9 FIGURE 13: S-14 LEFT LAP JOINT MODIFICATION (REPAIR), ESCAPE SLIDE LIGHT CUTOUT AT STATION 360 [Group 2-8] .................................. 3 3 1 FIGURE 14: LAP JOINT MODIFICATION (REPAIR) SPLICE [Group 2-8] ................ 3 3 9 FIGURE 15: S-10 LAP JOINT MODIFICATION (REPAIR) WITH INTEGRATED SRM WINDOW REPAIR [Group 2-8] .......................................... 3 4 2 FIGURE 16: SPECIAL REPAIR INSTRUCTIONS, FOR SRM REPAIR AT S-4 [Group 2-17] ...... 3 4 9 FIGURE 17: SPECIAL REPAIR INSTRUCTIONS, FOR SRM REPAIR AT S-10 [Group 2-17] ..... 3 5 3 FIGURE 18: SPECIAL REPAIR INSTRUCTIONS, FOR SRM REPAIR AT S-14 [Group 2-17] ..... 3 5 7 FIGURE 19: SPECIAL REPAIR INSTRUCTIONS, FOR SRM REPAIR [Group 2-17] .......... 3 6 1 FIGURE 20: INSPECTION REQUIREMENTS OUTER ROW, EXISTING REPAIR [Group 2-28] .... 3 6 7 FIGURE 21: S-14 LAP JOINT MODIFICATION (REPAIR) WITH INTEGRATED SRM WINDOW REPAIR [Group 2-8] .......................................... 3 6 8 FIGURE 22: INSPECT BS360 TO BS540, UPPER FORWARD AND LOWER AFT WINDOW CORNERS [Group 2-28] .......................................... 3 7 5 FIGURE 23: INSPECT BS727 TO BS908, LOWER FORWARD AND UPPER AFT WINDOW CORNERS [Group 2-28] .......................................... 3 8 0 FIGURE 24: REPAIR OF WINDOW LOWER CORNERS [Group 2-8] .................. 3 8 5 FIGURE 25: REPAIR OF WINDOW UPPER CORNERS [Group 2-8] .................. 4 0 4 FIGURE 26: REPAIR OF WINDOW CORNERS AT THE BUTT JOINT [Group 2-8] ........... 4 2 3 FIGURE 27: REPAIR OF WINDOW CORNERS AT ADJACENT WINDOWS [Group 2-8] ....... 4 3 9 FIGURE 28: WINDOW CORNER REPAIR SUBSEQUENT TO LAP JOINT MODIFICATION (REPAIR) [Group 2-8] ............................................... 4 6 8 FIGURE 29: INSPECT FORWARD OF BS540, LOWER FORWARD AND UPPER AFT WINDOW CORNERS [Group 2-28] .......................................... 4 9 5 FIGURE 30: INSPECT AFT OF BS727, UPPER FORWARD AND LOWER AFT WINDOW CORNERS [Group 2-28] .............................................. 4 9 8 FIGURE 31: WINDOW FRAME EDGE MARGIN REQUIREMENTS [Group 2-28] ........... 5 0 1 FIGURE 32: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 2 AND 5 (737-200P) [Group 2, 5] .................................. 5 0 3 FIGURE 33: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 3 AND 4 (737-200P) [Group 3-4] ................................... 5 0 5 FIGURE 34: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 6 AND 8 (737-200C) [Group 6, 8] .................................. 5 0 7 FIGURE 35: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 7 (737-200C) [Group 7] ..................................... 5 0 9 FIGURE 36: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 9, 10 AND 11 (737-300) [Group 9-11] ............................... 5 1 1 FIGURE 37: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 12 AND 13 (737-300) [Group 12-13] .................................. 5 1 3 FIGURE 38: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 14 (737-300) [Group 14] ..................................... 5 1 5 FIGURE 39: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 15 (737-300) [Group 15] ..................................... 5 1 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 4 of 598 BOEING SERVICE BULLETIN 737-53A1177
FIGURE 40: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 16 (737-300) [Group 16] ..................................... 5 1 9 FIGURE 41: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 17 (737-300) [Group 17] ..................................... 5 2 1 FIGURE 42: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 18 (737-300) [Group 18] ..................................... 5 2 3 FIGURE 43: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 19 AND 20 (737-400) [Group 19-20] .................................. 5 2 5 FIGURE 44: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 21 (737-400) [Group 21] ..................................... 5 2 7 FIGURE 45: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 22 (737-400) [Group 22] ..................................... 5 2 9 FIGURE 46: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 23 AND 24 (737-500) [Group 23-24] .................................. 5 3 1 FIGURE 47: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 25 AND 26 (737-500) [Group 25-26] .................................. 5 3 3 FIGURE 48: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 27 (737-500) [Group 27] ..................................... 5 3 5 FIGURE 49: LAP JOINT MODIFICATION (REPAIR) ZONES (CROWN LAP JOINT AREA) - GROUP 28 (737-500) [Group 28] ..................................... 5 3 7 FIGURE 50: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 2 AND 3 (737-200P) [Group 2-3] .......................................... 5 3 9 FIGURE 51: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 4 (737-200P) [Group 4 ] ................................................ 5 4 1 FIGURE 52: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 5 (737-200P) [Group 5 ] ................................................ 5 4 3 FIGURE 53: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 6 AND 7 (737-200C) [Group 6-7] .......................................... 5 4 5 FIGURE 54: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 8 (737-200C) [Group 8 ] ................................................ 5 4 7 FIGURE 55: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 9 (737-300) [Group 9 ] ................................................ 5 4 9 FIGURE 56: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 10 AND 12 (737-300) [Group 10, 12] ......................................... 5 5 1 FIGURE 57: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 11, 13, 14, 15, 16 AND 17 (737-300) [Group 11, 13-17] ............................ 5 5 3 FIGURE 58: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 18 (737-300) [Group 18] ............................................... 5 5 5 FIGURE 59: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 19 (737-400) [Group 19] ............................................... 5 5 7 FIGURE 60: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 20 AND 21 (737-400) [Group 20-21] ......................................... 5 5 9 FIGURE 61: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 22 (737-400) [Group 22] ............................................... 5 6 1 FIGURE 62: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 23 AND 25 (737-500) [Group 23, 25] ......................................... 5 6 3 FIGURE 63: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 24, 26 AND 27 (737-500) [Group 24, 26-27] ................................. 5 6 5 FIGURE 64: INSPECTION ZONES (OUTSIDE CROWN LAP JOINT AREA) - GROUP 28 (737-500) [Group 28] ............................................... 5 6 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 5 of 598 BOEING SERVICE BULLETIN 737-53A1177
FIGURE 65: LOCATE CRADLE AT CONTACT AREA BS 540 ...................... 5 6 9 FIGURE 66: LOCATE CRADLE AT CONTACT AREA BS 727 ...................... 5 7 1 FIGURE 67: LOCATE CRADLE AT CONTACT AREA BS 352 ...................... 5 7 3 FIGURE 68: LOCATE CRADLE AT CONTACT AREA BS 1016 ..................... 5 7 5 FIGURE 69: LOCATE CRADLE AT CONTACT AREA BS 787 ...................... 5 7 7 FIGURE 70: INSPECT S-4 BUTT JOINT SPLICE ............................. 5 7 9 FIGURE 71: INSPECT S-10 BUTT JOINT SPLICE ............................ 5 8 4 FIGURE 72: INSPECT S-9 TO S-10 BUTT JOINT SPLICE ........................ 5 8 9 Appendix A: DISCREPANT STRUCTURE REPORT ........................... 5 9 4 Appendix B: LOGIC DIAGRAM - MORE WORK REQUIRED IF FIGURES 22 AND 23 HAVE BEEN DONE ................................................. 5 9 6 APPENDIX C: FUEL BURN AND PERFORMANCE PENALTIES ..................... 5 9 7 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 6 of 598 BOEING SERVICE BULLETIN 737-53A1177
Commercial Airplanes 737 Service Bulletin Revision Transmittal SheetNumber: 737-53A1177Original Issue: November 08, 1994 Revision 7: June 14, 2013 ATA System: 5331 SUBJECT: FUSELAGE - Skin - Repair Methods For Cracks In Lower Skins At Lap Joints and Window Corners This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION More work is necessary on airplanes changed as shown in revision 5 or revision 6 of this service bulletin.
For Group 2 through 28 airplanes, except as noted below where operators incorporated the actions of Boeing messages:
– Additional window corner inspections are necessary at nine additional fastener holes in the corners of the passenger windows between BS 360 to BS 540, upper forward and lower aft, and between BS 727 and BS 908, lower forward and upper aft. Figures 22 and 23 identify the additional inspections. Refer to Accomplishment Instructions Part 3.B.5 and Compliance 1.E.10. for work instructions and inspection times.
A flow chart is provided in Appendix B of this service bulletin, showing the additional work required for airplanes that accomplished the Figure 22 and 23 actions of revisions 5 or 6. Following release of revision 6 of this bulletin, but prior to release of revision 7, Boeing sent messages to operators with instructions to do inspections and preventive modification of these nine additional fastener holes. At locations where the instructions of those messages have been incorporated with FAA, Boeing DER or Boeing AR approval, no more work is necessary at these nine fastener locations.
– Additional window corner inspections are necessary at fastener holes in the corners of the passenger windows between BS 360 to BS 540, lower forward and upper aft, and between BS 727 and BS 908, upper forward and lower aft. Figures 29 and 30 identify the additional inspections. Refer to Accomplishment Instructions Part 3.B.5 and Compliance 1.E.10. for work instructions and inspection times.
– Additional window corner inspections are necessary at fastener holes in the corners of the passenger windows forward of BS 360 and aft of BS 908. Figures 29 and 30 identify the additional inspections. Refer to Accomplishment Instructions Part 3.B.5 and Compliance 1.E.10. for work instructions and inspection times.
– Post Repair inspections are necessary for the lap joint modification (repair) or window belt skin panel replacement, refer to Compliance 1.E.7, window corner structure, refer to Compliance 1.E.11, and butt joints common to the lap joint modification (repair) or window belt skin panel replacement, refer to Compliance
1.E.13.
For Group 2, 4-5, 7, Configuration 2 airplanes:
– Airplanes that have incorporated the SB 737-53-1077 modification or repair, post alteration and post repair inspections are necessary for the S-20L lap joint, refer to Compliance 1.E.12.
Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2002-07-08, AD 2002-07-10 and AD 2002-07-11 are related to this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 7 of 598
No new airplanes have been added or removed from the effectivity of this service bulletin.
REASON FOR REVISION This revision is sent to provide lap joint modification (repair) drawings for 737-400 and 737-500 airplanes. Recent fleet data has shown that both stringer and window frames have cracked in locations outside of the area covered by previous releases of this service bulletin. This results in the need to accomplish more extensive inspections over a larger area. In addition window belt skin panel replacement drawings are provided for alternative lap joint modification (repair) to the S-10L/R and S-14L/R lap joints on 737-300 and 737-500 airplanes, updated lap joint modification (repair) figures for 737-200/-200C airplanes and post repair inspections for the lap joint modification (repair), window corner structure, and butt joints common to the lap joint modification (repair).
These sections were changed:
1. Summary, Effectivity - airplane groups have been increased from 11 to 28. Background, Action and Compliance sections have been revised.
2. Paragraph 1.A., Effectivity, Group Configuration table has been revised.
3. Paragraph 1.C., Reason, has been revised. The table below shows airplane group changes from Revision 6.
Airplane Group/Effectivity - Revision 6Airplane Group Group 6 airplanes1 Group 1 airplanes in the range P3683-P41462 Group 1 airplanes in the range P4147-P4399 with line numbers 924 to 1426.
3 Group 1 airplanes in the range P4147-P4399 with line numbers 1453 to1585.
4 Group 4 airplanes.5 Group 3 airplanes are in the range P8901-P8970.6 Group 3 airplanes that are in the range P8971-P9995.7 Group 5 airplanes.8 Group 7 airplanes less PP127-PP150 with line numbers 1001 to 1446.
9 Group 7 airplanes less PP127-PP150 with line numbers 1447 to 1920.
10 Group 7 airplanes less PP127-PP150 with line numbers 1924 to 1953.
11 Group 7 airplanes PP127-PP150 with line numbers 1521 to 1790.
12 Group 7 airplanes PP127-PP150 with line numbers 1942 to 1947.
13 Group 8 airplanes less PP151-PP160 and PS751- PS756.
14 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 8 of 598 BOEING SERVICE BULLETIN 737-53A1177
Airplane Group/Effectivity - Revision 6Airplane Group Group 8 airplanes PP151-PP160 and PS751-PS756.15 Group 9 airplanes less PS757-PS76216 Group 9 airplanes PS757-PS762.17 Group 2 airplanes PM543-PM547, PQ408 and PQ473.18 Group 10 airplanes P7801-P7975 and P8151-P8291 with line numbers 1487 to 1922.
19 Group 10 airplanes P7801-P7975 and P8151-P8291 with line numbers 1931 to 2496.
20 Group 10 airplanes PJ551, PV203, PW224-PW244, PW324-PW327 and PW462-PW467.
21 Group 2 airplanes PJ552, PW245 and PW282-PW284.22 Group 11 airplanes less P7235-P7245 (Group 27) and PU001-PU0025 (Group 25 and 26) with line numbers 1792 to1921.
23 Group 11 airplanes less P7235-P7245 (Group 20) and PU001-PU0025 (Group 19) with line numbers 1923 to 2494.
24 Group 11 airplanes PU001-PU007.25 Group 11 airplanes PU008-PU015.26 Group 11 airplanes PT028, PT060-PT063, PT304- PT306 and PT436-PT438.
27 Group 2 airplane PT064.28
4. Paragraph 1.D., Description, has been revised.
5. Paragraph 1.E., Compliance, has been revised.
6. Paragraph 1.F., Approval, reference to new Airworthiness Directives have been added.
7. Paragraph 1.G., Manpower, added tables for window belt replacement and revised group numbers.
8. Paragraph 1.H., Weight and Balance table has been deleted and a new paragraph added.
9. Paragraph 1.J., Data Supplied with this Service Bulletin, new drawing sheet references have been added to table.
10. Paragraph 2.A., Material, Price and Availability, new kits have been added for -300/-400/-500 airplanes.
11. Paragraph 2.C., Parts Necessary for each Airplane, new kit numbers have been added for -300/-400/-500 airplanes.
12. Paragraph 3.A., Accomplishment Instructions - General Notes, airplane group numbers revised from 11 to 28.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 9 of 598 BOEING SERVICE BULLETIN 737-53A1177
13. Paragraph 3.B., Accomplishment Instructions - Work Instructions, revise Part IV to reference Lap Joint Modification (Repair) instructions for -300 airplanes only, revise Part V to reference Figures 22-30, add Parts VI and VII to reference new Lap Joint Modification (Repair) instructions for -400/500 airplanes, add Parts VIII and IX to reference new inspections of the BS 360, BS 540, BS 727 and BS 908 butt splice structure in areas common to the S-4 and S-10 lap joint modification (repair) and common to the S-9 to S-10 window belt replacement. Add Part X to reference post repair inspections of the butt splice structure at BS 360, BS 540, BS 727 and BS 908.
14. Figures 2 to 6 deleted. New figures 32 thru 64 replace figures 2 thru 6 for lap joint inspection locations.
15. Figures 10 and 11, new repairs to show the lap joints at shear tie locations at S-4R and S-10R have been added.
16. Figures 22 and 23, nine additional fastener hole locations at S-10 and S-14 have been added.
17. Figures 24 and 25, repairs at window corners prior to lap joint modification (repairs) at S-10 and S-14 have been added.
18. Figure 26, repairs to butt joints at S-10 and S-14 have been added.
19. Figure 27, new figure added to show upper and lower adjacent window corner repairs at S-10 and S-14.
20. Figure 28, new figure added to show repairs subsequent to lap joint modifications at S-10 and S-14.
21. Figures 29 and 30, new figures added to show inspection of fastener holes at unmodified upper and lower window frame locations at S-10 and S-14.
22. Figure 31, new figure added to show window frame edge margin requirements.
23. Figures 32 thru 64, new figures added to show lap joint modification (repair) locations for crown lap joints and inspection locations for lap joints outside the crown area. These figures replace figures 2 thru 6.
24. Figures 65 thru 69, new figures added to show cradle contact areas for support of the fuselage in jig position.
25. Figures 70, 71 and 72, new figures added to show inspection of the BS 360, BS 540, BS 727 and BS908 butt splice structure in areas common to the S-4 and S-10 lap joint modification (repair) and common to the S-9 to S-10 window belt skin panel replacement.
26. Appendix A added to include a discrepant structure report.
27. Appendix B added to include a logic diagram reference more work required if figures 22 and 23 have been done.
28. Appendix C added to include fuel burn penalty analysis data.
Paragraph I.A., Effectivity, has no new changes in the airplane operators.
Vertical lines are put on the left edge of each page, except in Paragraph I.A., Effectivity, to show the location of important changes. Pages with no vertical lines have no important changes.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 10 of 598 BOEING SERVICE BULLETIN 737-53A1177
REVISION HISTORY November 08, 1994Original Issue:
September 19, 1996Revision 1:
July 24, 1997Revision 2:
September 18, 1997Revision 3:
September 02, 1999Revision 4:
February 15, 2001Revision 5:
May 31, 2001Revision 6:
June 14, 2013Revision 7:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 11 of 598 BOEING SERVICE BULLETIN 737-53A1177
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 08, 1994 737-53A1177Revision 7: June 14, 2013 12 of 598 BOEING SERVICE BULLETIN 737-53A1177