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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1334 Original Issue: September 26, 2017 ATA System: 5743 SUBJECT: WINGS - Landing Gear Attach Fittings - Main Landing Gear Beam Forward Support Fitting - Inspection and Repair 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 © 2017 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Unpublished Work.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: September 26, 2017 737-57A1334 1 of 101
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 2 of 101 BOEING SERVICE BULLETIN 737-57A1334
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BLANK PAGE
Table of Contents
S u m m a r y5
1. PLANNING INFORMATION9
A . E f f e c t i v i t y9
1. Airplanes9
2 . S p a r e s A f f e c t e d ........................................ 2 2 B. Concurrent Requirements ...................................... 2 2 C. Reason ................................................ 2 2 D. Description .............................................. 2 3 E. Compliance .............................................. 2 4 F . A p p r o v a l ............................................... 3 3 G. Manpower .............................................. 3 3 H. Weight and Balance Changes .................................... 3 5 I. Electrical Load Data ......................................... 3 5 J . R e f e r e n c e s .............................................. 3 5
1. Existing Data: ......................................... 3 5
2. Data Supplied with this Service Bulletin: ........................... 3 5
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 3 5 K. Publications Affected ........................................ 3 6 L. Interchangeability and Intermixability of Parts ........................... 3 6 M. Software Accomplishment Summary ................................ 3 6
2. MATERIAL INFORMATION ........................................ 3 7 A. Material - Price and Availability ................................... 3 7 B. Industry Support Information .................................... 3 7 C. Parts Necessary for Each Airplane ................................. 3 7 1 . K i t s / P a r t s ............................................ 3 7
2. Parts and Materials Supplied by the Operator ........................ 3 7
3. Parts Modified and Reidentified ................................ 3 9
4. Parts Removed and Not Replaced .............................. 3 9 D. Parts Necessary to Change Spares ................................. 3 9 E. Special Tooling - Price and Availability ............................... 3 9 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 9
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 4 1 A. GENERAL INFORMATION ..................................... 4 1 B. WORK INSTRUCTIONS ....................................... 4 2 FIGURE 1: LEFT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - REMOVAL OF FASTENERS [Group 2] .................................... 4 8 FIGURE 2: RIGHT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - REMOVAL OF FASTENERS [Group 2] .................................. 5 1 FIGURE 3: LEFT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - OPEN HOLE HFEC INSPECTION [Group 2] ................................ 5 4 FIGURE 4: RIGHT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - OPEN HOLE HFEC INSPECTION [Group 2] ................................ 5 7 FIGURE 5: LEFT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - SURFACE HFEC INSPECTION AT EACH FASTENER HOLE WITH FREEZE PLUG [Group 2, Configuration 2 , 4 , 6 ] .............................................. 6 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 3 of 101 BOEING SERVICE BULLETIN 737-57A1334
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FIGURE 6: RIGHT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - SURFACE HFEC INSPECTION AT EACH FASTENER HOLE WITH FREEZE PLUG [Group 2, Configuration 2 , 4 , 6 ] .............................................. 6 3 FIGURE 7: LEFT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - FREEZE PLUG REPAIR [Group 2, Configuration 1, 3, 5] ........................... 6 6 FIGURE 8: RIGHT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - FREEZE PLUG REPAIR [Group 2, Configuration 1, 3, 5] ........................ 7 1 FIGURE 9: LEFT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - INSTALLATION OF FASTENERS [Group 2] .................................. 7 6 FIGURE 10: RIGHT WING - MAIN LANDING GEAR BEAM FORWARD SUPPORT FITTING - INSTALLATION OF FASTENERS [Group 2] .................................. 8 0 APPENDIX A: TABLE 1: OPEN HOLE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITHOUT A FREEZE PLUG INSTALLED [Group 2, Configuration 1] ...... 8 4 APPENDIX B: TABLE 2: OPEN HOLE AND SURFACE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITH A FREEZE PLUG INSTALLED [Group 2, Configuration 2] . . . 86 APPENDIX C: TABLE 3: OPEN HOLE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITHOUT A FREEZE PLUG INSTALLED [Group 2, Configuration 3] ...... 9 0 APPENDIX D: TABLE 4: OPEN HOLE AND SURFACE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITH A FREEZE PLUG INSTALLED [Group 2, Configuration 4] . . . 92 APPENDIX E: TABLE 5: OPEN HOLE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITHOUT A FREEZE PLUG INSTALLED [Group 2, Configuration 5] ...... 9 6 APPENDIX F: TABLE 6: OPEN HOLE AND SURFACE HFEC INSPECTION ON THE MLG BEAM FORWARD SUPPORT FITTING WITH A FREEZE PLUG INSTALLED [Group 2, Configuration 6] . . . 98 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 4 of 101 BOEING SERVICE BULLETIN 737-57A1334
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-57A1334Original Issue: September 26, 2017 ATA System: 5743 SUBJECT: WINGS - Landing Gear Attach Fittings - Main Landing Gear Beam Forward Support Fitting - Inspection and Repair
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of this service bulletin will detect cracks in the Main Landing Gear (MLG) beam forward support fitting. If this service bulletin is not done, undetected cracks in the MLG beam forward support fitting can result in a fuel leak or lead to the inability of a principal structural element to carry limit load, or MLG collapse that could prevent continued safe flight and landing.
During a repair of the right wing rear spar, one operator reported crack indications in the MLG beam forward support fitting. Other operators have reported MLG beam forward support fitting cracking around the fastener locations common to the rear spar web below the upper chord on the inboard side of the Wing Buttock Line (WBL) 157 rib. Cracks were found on airplanes from 62,706 to 65,827 flight hours and 50,152 to 53,039 flight cycles. Cracks in the MLG beam forward support fitting at this location are entirely hidden. The forward side of the fitting (inside fuel tanks) is hidden by sealant and the aft side of the fitting is hidden by the rear spar web and MLG Beam. MLG beam forward support fitting cracks would not be reliably detected during normal maintenance therefore requiring additional inspections.
This Service Bulletin gives instructions for the inspection of the MLG beam forward support fitting for any crack to make sure they are found and repaired before they reach a critical length that could prevent continued safe flight operation.
Boeing Service Related Problem (SRP) 737-SRP-57-0304 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 737 FTD 57-16002 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 5 of 101
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Group 1:
Boeing endorses the FAA rules related to Limit of Validity (LOV) and recommends immediate and permanent removal from service of any airplanes upon reaching the LOV, whether or not it is operated under FAA jurisdiction.
As such, Boeing no longer provides maintenance instructions for airplanes that have accumulated flight cycles beyond the LOV. Airplanes in Group 1 (line numbers 1-291) have accumulated flight cycles beyond the LOV of the maintenance program. 14 CFR 121.1115 and 129.115 prohibit operation of an airplane beyond its LOV.
Group 2, Configuration 1, 3, 5:
For airplanes without a freeze plug installed in the inspection area, remove fasteners from the MLG beam forward support fitting and do an open hole High Frequency Eddy Current (HFEC) inspection for any crack. If no crack is found, repeat the open hole HFEC inspection. If any crack is found in one fastener hole location, ream the fastener hole to remove the crack and install a freeze plug. Repeat inspection in new configuration (Group 2, configuration 2, 4, or 6). If any crack is found in more than one fastener hole location, contact The Boeing Company for repair instructions and do the repair. Install fasteners.
Group 2, Configuration 2, 4, 6:
For airplanes with a freeze plug installed in the inspection area, do a surface HFEC inspection at the freeze plug repaired hole. At the locations without a freeze plug, remove fasteners and do open hole HFEC inspections for any crack. If no crack is found, repeat surface and open hole HFEC inspections. If any crack is found, contact The Boeing Company for repair instructions and do the repair. Install fasteners.
EFFECTIVITY All 737-100, 737-200, 737-200C, 737-300, 737-400, and 737-500 airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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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 inspection and repair procedures given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 7 of 101 BOEING SERVICE BULLETIN 737-57A1334
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BOEING SERVICE BULLETIN 737-57A1334
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FOR AIRPLANES WITHOUT FREEZE
PLUGS, DO AN OPEN HOLE HIGH
FREQUENCY EDDY CURRENT (HFEC) INSPECTION FOR ANY CRACK.
FOR AIRPLANES WITH FREEZE PLUGS
INSTALLED, DO A SURFACE HFEC
INSPECTION ON FREEZE PLUGGED
HOLES AND AN OPEN HOLE HFEC
INSPECTION ON NON-FREEZE PLUGGED HOLES FOR ANY CRACK.
WBL
135.50 WBL
157.00 LEFT WING SHOWN RIGHT WING OPPOSITE 2577571 Original Issue: September 26, 2017 Export Controlled ECCN: 9E991 - BOEING 737-57A1334 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 101
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-57A1334 Original Issue: September 26, 2017 ATA System: 5743 SUBJECT: WINGS - Landing Gear Attach Fittings - Main Landing Gear Beam Forward Support Fitting - Inspection and Repair
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to all 737-100/200/200C/300/400/500 Airplanes in 2 Groups.
The Variable Numbers and Group Information for the applicable airplanes is given below.
Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP Airplane line numbers 1 - 291-1 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 9 of 101
DESCRIPTIONCONFIGURATIONGROUP Airplane line numbers 292 - 3132-2 Airplanes that have not done the rear spar web repair and replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 5 or a Boeing Organization Designation Authorization (ODA) FAA 8100-9 Form and that have not installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
1 Airplanes that have not done the rear spar web repair and replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 5 or a Boeing ODA FAA 8100-9 Form and that have installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
2 Airplanes that have done the rear spar web repair and replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 5 or a Boeing ODA FAA 8100-9 Form and that have not installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
3 Airplanes that have done the rear spar web repair and replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 5 or a Boeing ODA FAA 8100-9 Form and that have installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
4 Airplanes that have replaced the MLG beam forward support fitting and installed a wing rear spar chord replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 4 or a Boeing ODA FAA 8100-9 Form and that have not installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
5 Airplanes that have replaced the MLG beam forward support fitting and installed a wing rear upper spar chord replacement in accordance with 737-300/400/500 SRM 57-20-10, Repair 4 or a Boeing ODA FAA 8100-9 Form and that have installed a freeze plug for any of the 14 fasteners on the inboard side of the MLG beam forward support fitting common only to the rear spar web in the inspection area.
6 Airplane Models:
737-100, 737-200, 737-200C, 737-300, 737-400, 737-500 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 10 of 101 BOEING SERVICE BULLETIN 737-57A1334
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GroupVariable Number 1PA001 - PA022 1PA099 1PA231 - PA232 1PC001 - PC005 1PG001 - PG075 1PG199 1PG201 - PG230 1PG251 - PG255 1PG271 - PG279 1PG301 - PG314 1PG331 - PG332 1PG351 - PG356 1PG375 1PG401 - PG403 1PG431 - PG442 1PG471 - PG475 1PG501 - PG505 1PG571 - PG583 2PG584 - PG586 1PG621 - PG630 1PG651 - PG652 1PG701 - PG705 2PH001 2PH011 - PH013 2PH021 - PH024 1PH701 - PH715 1PH731 - PH732 1PH741 - PH742 2PH743 1PJ001 - PJ002 2PJ003 - PJ009 1PJ031 - PJ032 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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GroupVariable Number 1PJ071 - PJ072 1PJ101 - PJ104 2PJ105 - PJ119 2PJ201 - PJ219 2PJ301 - PJ302 2PJ551 - PJ561 2PJ601 - PJ615 2PJ811 2PJ816 - PJ817 2PK026 - PK029 2PK041 - PK053 2PK061 - PK070 2PK081 - PK082 2PK091 - PK099 2PK101 - PK103 2PK111 - PK120 2PK141 - PK146 2PK201 - PK204 2PK211 - PK223 2PK231 - PK241 2PK251 - PK258 2PK271 - PK274 2PK281 - PK289 2PK291 2PK301 - PK318 2PK341 2PK351 - PK361 2PK391 2PK431 - PK433 2PK451 - PK452 2PK461 - PK469 2PK495 2PK501 - PK504 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 26, 2017 737-57A1334 12 of 101 BOEING SERVICE BULLETIN 737-57A1334