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Commercial Airplanes 737 Service Bulletin Number: 737-53A1200 Original Issue: April 13, 2006 Revision 2: September 12, 2012 ATA System: 5313 SUBJECT: FUSELAGE - Structure Around Openings - Forward Entry and Forward Galley Service Doorway Upper and Lower Hinge Cutout - Inspection 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 © 2006 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Unpublished Work.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, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, 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. BOEING is a trademark of Boeing Management Company.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 1 of 498
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 2 of 498 BOEING SERVICE BULLETIN 737-53A1200
BLANK PAGE
Table of Contents
Revision Transmittal Sheet7
S u m m a r y9
1. PLANNING INFORMATION ........................................ 1 3 A . E f f e c t i v i t y ............................................... 1 3
1. Airplanes ............................................ 1 3 2 . S p a r e s A f f e c t e d ........................................ 2 9 B. Concurrent Requirements ...................................... 2 9 C. Reason ................................................ 2 9 D. Description .............................................. 3 0 E. Compliance .............................................. 3 1 F . A p p r o v a l ............................................... 1 4 9 G. Manpower .............................................. 1 5 0 H. Weight and Balance Changes ................................... 1 6 3 I. Electrical Load Data ........................................ 1 6 3 J . R e f e r e n c e s ............................................. 1 6 3
1. Existing Data: ......................................... 1 6 3
2. Data Supplied with this Service Bulletin: .......................... 1 6 4
3. Installation Drawings Used in the Preparation of this Service Bulletin: .......... 1 6 4 K. Publications Affected ........................................ 1 6 4 L. Interchangeability and Intermixability of Parts ........................... 1 6 5 M. Software Accomplishment Summary ............................... 1 6 5
2. MATERIAL INFORMATION ....................................... 1 6 7 A. Material - Price and Availability .................................. 1 6 7 B. Industry Support Information .................................... 1 6 7 C. Parts Necessary for Each Airplane ................................ 1 6 7 1 . K i t s / P a r t s : ........................................... 1 6 7
2. Parts and Materials Supplied by the Operator: ....................... 1 6 7
3. Parts Modified and Reidentified: ............................... 1 8 0
4. Parts Removed and Not Replaced: ............................. 1 8 0 D. Parts Necessary to Change Spares ................................ 1 8 0 E. Special Tooling - Price and Availability .............................. 1 8 0 F. Special Tooling Necessary to do this Service Bulletin ...................... 1 8 0
3. ACCOMPLISHMENT INSTRUCTIONS ................................. 1 8 1 A. GENERAL INFORMATION .................................... 1 8 1 B. WORK INSTRUCTIONS ...................................... 1 8 2 F I G U R E 1 : F O R W A R D E N T R Y D O O R - R A I N G U T T E R - R E M O V A L [ G r o u p 1 - 4 , 6 - 9 ] ........ 2 1 8 FIGURE 2: FORWARD GALLEY SERVICE DOOR - RAIN GUTTER - REMOVAL [Group 1-4, 6-8] . 220 FIGURE 3: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, 9, Configuration 1] ................................ 2 2 2 FIGURE 4: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, 9, Configuration 2] ................................ 2 2 8 FIGURE 5: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 2, 7-8] ......................................... 2 3 4 FIGURE 6: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 4] ............................................ 2 4 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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FIGURE 7: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, 9, Configuration 1] ................................ 2 4 6 FIGURE 8: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, 9, Configuration 2] ................................ 2 5 2 FIGURE 9: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 2, 7-8] ......................................... 2 5 8 FIGURE 10: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 3] ............................................ 2 6 4 FIGURE 11: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 4] ............................................ 2 7 0 FIGURE 12: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, Configuration 1] ......................... 2 7 6 FIGURE 13: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, Configuration 2] ......................... 2 8 0 FIGURE 14: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 2, 7-8] ................................. 2 8 4 FIGURE 15: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 3-4] .................................. 2 8 8 FIGURE 16: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, 6, Configuration 1] ......................... 2 9 2 FIGURE 17: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 1, Configuration 2; Group 2; Group 6, Configuration 2; Group 7-8] . 296 FIGURE 18: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 3-4] .................................. 3 0 0 FIGURE 19: FORWARD ENTRY DOOR - RAIN GUTTER - INSTALLATION [Group 1-4, 6-9] ..... 3 0 4 FIGURE 20: FORWARD GALLEY SERVICE DOOR - RAIN GUTTER - INSTALLATION [Group 1-4, 6-8] ................................................. 3 0 6 FIGURE 21: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION [Group 3] ............................................ 3 0 8 FIGURE 22: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, 9, Configuration 1] .................................... 3 1 4 FIGURE 23: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, 9, Configuration 2] .................................... 3 1 8 FIGURE 24: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 2 , 7 - 8 ] ............................................. 3 2 2 FIGURE 25: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 4 ] ................................................ 3 2 6 FIGURE 26: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 3 ] ................................................ 3 3 0 FIGURE 27: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, 9, Configuration 1] .................................... 3 3 4 FIGURE 28: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, 9, Configuration 2] .................................... 3 3 8 FIGURE 29: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 2 , 7 - 8 ] ............................................. 3 4 2 FIGURE 30: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 3 ] ................................................ 3 4 6 FIGURE 31: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 4 ] ................................................ 3 5 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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FIGURE 32: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, Configuration 1] ......................... 3 5 4 FIGURE 33: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, Configuration 2] ......................... 3 5 8 FIGURE 34: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 2, 7-8] ................................. 3 6 2 FIGURE 35: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION [Group 3-4] .................................. 3 6 6 FIGURE 36: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 1, 6, Configuration 1] ......................... 3 7 0 FIGURE 37: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 1, Configuration 2; Group 2; Group 6, Configuration 2; Group 7-8] . 374 FIGURE 38: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION [Group 3-4] .................................. 3 7 8 FIGURE 39: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, 9, Configuration 1] ............. 3 8 2 FIGURE 40: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8; Group 9, Configuration 2 ] ................................................ 3 8 6 FIGURE 41: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] ........................ 3 9 0 FIGURE 42: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 3] ........................ 3 9 4 FIGURE 43: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 4] ........................ 3 9 8 FIGURE 44: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, 9, Configuration 1] ............. 4 0 2 FIGURE 45: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8; Group 9, Configuration 2 ] ................................................ 4 0 6 FIGURE 46: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 2, 4] ...................... 4 1 0 FIGURE 47: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 3] ........................ 4 1 4 FIGURE 48: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 1; Group 8] . 418 FIGURE 49: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] ................ 4 2 4 FIGURE 50: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8] . 430 FIGURE 51: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - EDDY CURRENT INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] ................ 4 3 5 FIGURE 52: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, 9, Configuration 1] ............... 4 4 0 FIGURE 53: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8; Group 9, Configuration 2] ................................................. 4 4 4 FIGURE 54: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] .......................... 4 4 8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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FIGURE 55: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 3] .......................... 4 5 2 FIGURE 56: FORWARD ENTRY DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 4] .......................... 4 5 6 FIGURE 57: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, 9, Configuration 1] ............... 4 6 0 FIGURE 58: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8; Group 9, Configuration 2] ................................................. 4 6 4 FIGURE 59: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 2, 4] ........................ 4 6 8 FIGURE 60: FORWARD ENTRY DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 3] .......................... 4 7 2 FIGURE 61: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 1; Group 8] . 476 FIGURE 62: FORWARD GALLEY SERVICE DOORWAY - UPPER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] ................ 4 8 0 FIGURE 63: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 1, Configuration 2; Group 8] . 484 FIGURE 64: FORWARD GALLEY SERVICE DOORWAY - LOWER HINGE CUTOUT - DETAILED INSPECTION OF SRM REPAIRED STRUCTURE [Group 2] ................ 4 8 8 FIGURE 65: FORWARD GALLEY SERVICE DOORWAY - TORQUE TUBE ACCESS PANEL REMOVAL [Group 1-2, 8] ......................................... 4 9 2 FIGURE 66: FORWARD GALLEY SERVICE DOORWAY - TORQUE TUBE ACCESS PANEL INSTALLATION [Group 1-2, 8] ......................................... 4 9 4 FIGURE 67: FORWARD ENTRY DOORWAY - MAKE FILLER [Group 1-4, 6-9] ............ 4 9 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 6 of 498 BOEING SERVICE BULLETIN 737-53A1200
Commercial Airplanes 737 Service Bulletin Revision Transmittal SheetNumber: 737-53A1200Original Issue: April 13, 2006 Revision 2: September 12, 2012 ATA System: 5313 SUBJECT: FUSELAGE - Structure Around Openings - Forward Entry and Forward Galley Service Doorway Upper and Lower Hinge Cutout - Inspection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION No more work is necessary on the airplane(s) changed in accordance with Revision 1 of this service bulletin.
REASON FOR REVISION This revision is sent to correct errors and to make a change to the Compliance Tables.
These sections were changed:
1. Summary Background - A Summary Evaluation Table is added.
2. Paragraph 1.A.1., Airplanes - Revised the description of Group 9, Configuration 2 airplanes.
3. Paragraph 1.E., Compliance - Changed Compliance Time in Table 23. Changed compliance time in multiple locations to state that grace period is based on Federal Aviation Administration (FAA) Airworthiness Directive AD 2008-11-04 and not the original issue date of this service bulletin.
4. Paragraph 1.F., Approval - Changed SB revision number in multiple locations.
5. Paragraph 1.J.1., Existing Data - Two 737-100/200 AMM references are updated. Two AD references are removed.
6. Paragraph 1.M., Software Accomplishment Summary - Section is added.
7. Paragraph 2.C.2., Parts and Materials Supplied by the Operator - Revised footnote references and quantities for some fasteners. Deleted the table for Group 6, Configuration 2 and now Group 1, Configuration 2 and Group 6, Configuration 2 share a common table.
8. Paragraph 3.B.3., Work Instructions - Changed reference from forward entry doorway to forward galley service doorway in Part 4 and Part 5.
9. Paragraph 3.A., General Information Note 1 regarding the sequencing of steps is deleted. One note is added.
10. Paragraph 3.B., Work Instructions - Two 737-100/200 AMM references are updated.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 7 of 498
11. Figure 67 - Changed a dimension on sheets 1 and 2, to correct a typographical error.
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 April 13, 2006Original Issue:
July 07, 2011Revision 1:
September 12, 2012Revision 2:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 8 of 498 BOEING SERVICE BULLETIN 737-53A1200
Commercial Airplanes 737 Service Bulletin SummaryNumber: 737-53A1200Original Issue: April 13, 2006 Revision 2: September 12, 2012 ATA System: 5313 SUBJECT: FUSELAGE - Structure Around Openings - Forward Entry and Forward Galley Service Doorway Upper and Lower Hinge Cutout - Inspection
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of the inspections in this service bulletin will detect cracks in the skin, bearstrap and frame outer chords in the upper and lower hinge cutout areas of the forward entry and forward galley service doorways.
Cracks that originate in the bearstrap or frame outer chord may not be detected with current inspection programs.
If cracks in the skin, bearstrap and frame outer chord are not detected they could cause a rapid decompression of the airplane.
There have been multiple reports of cracks in the skin, bearstrap, and/or frame outer chord in the hinge cutout areas of the forward entry and forward galley service door cutouts. Forward entry doorway bearstrap cracks have been reported on an airplane with as few as 24,538 flight cycles. Forward galley service doorway bearstrap cracks have been reported on an airplane with as few as 24,423 flight cycles. One operator reported a severed bearstrap, severed STA 291.5 frame, and 14.5 inch long crack in the skin at the forward galley service doorway lower hinge cutout. The airplane had accumulated 61,297 flight cycles.
Since the release of the original issue of this service bulletin, there have been fifteen reports of cracks in the skin and/or bear strap at the forward galley service doorway hinge cutouts when the airplane had less than 40,000 total flight cycles. The lowest reported flight cycles on an airplane with a crack was 24,423 total flight cycles. This airplane had a 0.55 inch long crack in the skin. There were no cracks in the bear strap. There have also been four reports of cracking under repairs installed at the hinge cutouts in accordance with the Structural Repair Manual (SRM).
Service Related Problem (SRP) 737-SRP-53-0134 and 737-SRP-53-0315 are related to this problem.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., ComplianceYesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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ReferenceAffectedPlanning Data Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Group 1-4, 6-8:
Do an external detailed inspection, internal detailed inspection, and eddy current inspections for cracks in and around the forward entry doorway and galley service doorway upper and lower hinge cutouts in the skin and bearstrap and in the frame outer chord. If any crack is found, contact Boeing for repair instructions. If no cracks are found continue to do the repeat inspections at the intervals specified in Paragraph 1.E., Compliance.
Group 9:
Do an external detailed inspection, internal detailed inspection, and eddy current inspections for cracks in and around the forward entry doorway upper and lower hinge cutouts in the skin and bearstrap and in the frame outer chord. If any crack is found, contact Boeing for repair instructions. If no cracks are found continue to do the repeat inspections at the intervals specified in Paragraph 1.E., Compliance.
Group 5:
Contact Boeing for inspection instructions and do the work instructed by Boeing.
EFFECTIVITY 737-100, -200, -200C, -300, -400 and -500 series airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directives AD 2008-11-04, AD 98-11-04 R1, AD 2008-08-23 and AD 2008-09-13 are related to this service bulletin.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection, and/or repair procedures given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 10 of 498 BOEING SERVICE BULLETIN 737-53A1200
BOEING SERVICE BULLETIN 737-53A1200
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability.
SEE
TYPICAL CRACKS
UPPER HINGE CUTOUT
INSPECT FOR CRACKS IN THE
SKIN, BEARSTRAP AND FRAME
CHORD, AROUND THE FORWARD
GALLEY AND FORWARD ENTRY
DOORWAY UPPER AND LOWER HINGE
CUTOUTS
TYPICAL CRACKS
LOWER HINGE CUTOUT FWD A RIGHT SIDE SIMILAR J61169 Original Issue: April 13, 2006 Revision 2: September 12, 2012 Export Controlled ECCN: 9E991 - BOEING 737-53A1200 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 498
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: April 13, 2006 737-53A1200Revision 2: September 12, 2012 12 of 498 BOEING SERVICE BULLETIN 737-53A1200