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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-25A1876 RB Original Issue: September 01, 2023 ATA System: 2531 SUBJECT: EQUIPMENT / FURNISHINGS - Galleys - Galley Wire Bundle Protective Wrap Inspection and Replacement EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR.
9E991ECCN:
Copyright © 2023 The Boeing Company Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.
Original Issue: September 01, 2023 737-25A1876 RB 1 of 13
5.0
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 2 of 13 REQUIREMENTS BULLETIN 737-25A1876
ALERTALERT
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Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected6
2. CONCURRENT REQUIREMENTS6
3. COMPLIANCE6
4. APPROVAL8
5. ACCOMPLISHMENT INSTRUCTIONS9
A. General Information9
B. Work Instructions10
APPENDIX A: AFFECTED GALLEY PART NUMBERS13
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 3 of 13 REQUIREMENTS BULLETIN 737-25A1876
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Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 4 of 13 REQUIREMENTS BULLETIN 737-25A1876
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-25A1876 RB Original Issue: September 01, 2023 ATA System: 2531 SUBJECT: EQUIPMENT / FURNISHINGS - Galleys - Galley Wire Bundle Protective Wrap Inspection and Replacement
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. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. Effectivity A. Airplanes This bulletin is applicable to 737-800 Airplane(s), line number(s) 178, 186, 266, 420-421, 426, 444, 479-480, 522 in 2 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP 737-800 airplanes delivered with Galleys G1, G2, G4B and G7-1 737-800 airplanes delivered with Galleys G1, G2 and G4B-2 Airplane Models:
737-800 GroupVariable Number 2YC751 - YC752 GroupVariable Number 1YC763 - YC768 GroupVariable Number 2YC902 - YC903 B. Spares Affected Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 5 of 13
None.
2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to Requirements Bulletin 737-25A1876 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-25A1876 RB mandatory.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Accomplish the required action(s), based on the applicable condition(s) in Table(s) 1 through 2, in accordance with Accomplishment Instructions.
Group 1:
Table 1: Galley Wire Bundle Protective Wrap Replacement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 31 months after the Original Issue date of Requirements Bulletin 737-25A1876 RB.
OPTION 1 : Do an Inspection of Galley G1, G2, G4B and G7 to find the part number.
All Airplanes.
OPTION 2: Do a maintenance records check of Galley G1, G2, G4B and G7 to find the part number.
-Within 31 months after the Original Issue date of Requirements Bulletin 737-25A1876 RB.
Adjacent to the galley identification placard, inspect for an existing galley modification placard.
Do an Inspection of the modification placard.
CONDITION 1: ANY GALLEY
FOUND WITH AN AFFECTED
PART NUMBER -Before further flight.Replace galley wire bundle spiral wrap protective sleeving with the BMS 13-81 wire protective sleeving.
CONDITION 1.1: ANY GALLEY
FOUND WITHOUT MODIFICA-
TION PLACARD INSTALLED
OR ANY GALLEY FOUND
WITH MODIFICATION PLAC-
ARD INSTALLED NOT
MARKED AS MODIFIED PER SB 25-442 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 6 of 13 REQUIREMENTS BULLETIN 737-25A1876
ALERTALERT
Group 1:
Table 1: Galley Wire Bundle Protective Wrap Replacement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition --No further action required.CONDITION 1.2: ANY GALLEY
FOUND WITH MODIFICATION
PLACARD INSTALLED
MARKED AS MODIFIED PER SB 25-442 --No further action required.CONDITION 2: ANY GALLEY
FOUND WITHOUT AN AFFECT-
ED PART NUMBER Group 2:
Table 2: Galley Wire Bundle Protective Wrap Replacement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 31 months after the Original Issue date of Requirements Bulletin 737-25A1876 RB.
OPTION 1 : Do an Inspection of Galley G1, G2 and G4B to find the part number.
All Airplanes.
OPTION 2: Do a maintenance records check of Galley G1, G2 and G4B to find the part number.
-Within 31 months after the Original Issue date of Requirements Bulletin 737-25A1876 RB.
Adjacent to the galley identification placard, inspect for an existing galley modification placard.
Do an Inspection of the modification placard.
CONDITION 3: ANY GALLEY
FOUND WITH AN AFFECTED
PART NUMBER -Before further flight.Replace galley wire bundle spiral wrap protective sleeving with the BMS 13-81 wire protective sleeving.
CONDITION 3.1: ANY GALLEY
FOUND WITHOUT MODIFICA-
TION PLACARD INSTALLED
OR ANY GALLEY FOUND
WITH MODIFICATION PLAC-
ARD INSTALLED NOT
MARKED AS MODIFIED PER SB 25-442 --No further action required.CONDITION 3.2: ANY GALLEY
FOUND WITH MODIFICATION
PLACARD INSTALLED
MARKED AS MODIFIED PER SB 25-442 --No further action required.CONDITION 4: ANY GALLEY
FOUND WITHOUT AN AFFECT-
ED PART NUMBER Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 7 of 13 REQUIREMENTS BULLETIN 737-25A1876
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4. APPROVAL This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this document comply with the applicable regulations and are FAA approved, as well as European Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in this Requirements Bulletin effectivity. This document and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this Requirements Bulletin.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 8 of 13 REQUIREMENTS BULLETIN 737-25A1876
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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated by an Airworthiness Directive (AD), then all applicable requirements specified in the RB must be done. For the related SB, some locations are marked RC Start and RC End to identify the requirements that are restated from the RB. For the related SB, the areas between RC Start and RC End, including sub-steps and any figures identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC; this is provided that the steps between RC Start and RC End, including sub-steps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. This is an Enhanced Required for Compliance document. The Boeing processes used to create the Service Bulletin (SB) and the Requirements Bulletin (RB) ensure that the information between "RC Start" and "RC End" in the SB are identical to the information in the same sections (Compliance, Work Instructions...) of the RB which the SB refers to as the related document.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
4. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch – Angular tolerance is plus or minus 2 degrees – Hole dimensions for standard solid rivets and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque Values:
— Values for airframe maintenance tasks are included in Chapter 20 of 737-600/700/800/900 Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM).
5. These work instructions refer to procedures included in other Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used.
6. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 9 of 13 REQUIREMENTS BULLETIN 737-25A1876
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7. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed.
8. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
9. A maintenance records check can be done provided the part number and if modification of affected galleys can be conclusively determined from that check.
B. WORK INSTRUCTIONS Actions Required for Compliance
1. Requirements:
Group 1:
TABLE 1: GALLEY WIRE BUNDLE PROTECTIVE WRAP REPLACEMENT Refer to the listed procedures in SB 737-25A1876 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition Get access to the passenger compartment.
-OPTION 1: Do an Inspection of Galley G1, G2, G4B and G7 to find the part number.
All Airplanes.
APPENDIX B- -APPENDIX A -APPENDIX AOPTION 2: Do a maintenance records check of Galley G1, G2, G4B and G7 to find the part number.
APPENDIX C-Adjacent to the galley identification placard, inspect for an existing galley modification placard. Do an Inspection of the modification placard.
CONDITION 1: ANY GAL-
LEY FOUND WITH AN AF-
FECTED PART NUMBER PART 1: GALLEY WIRE
BUNDLE PROTECTIVE
WRAP REPLACEMENT -Replace galley wire bundle spiral wrap protective sleeving with the BMS 13- 81 wire protective sleeving.
CONDITION 1.1: ANY
GALLEY FOUND WITH-
OUT MODIFICATION
PLACARD INSTALLED OR
ANY GALLEY FOUND
WITH MODIFICATION
PLACARD INSTALLED
NOT MARKED AS MODI- FIED PER SB 25-442 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 10 of 13 REQUIREMENTS BULLETIN 737-25A1876
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Group 1:
TABLE 1: GALLEY WIRE BUNDLE PROTECTIVE WRAP REPLACEMENT Refer to the listed procedures in SB 737-25A1876 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition --No further action required.CONDITION 1.2: ANY
GALLEY FOUND WITH
MODIFICATION PLACARD
INSTALLED MARKED AS MODIFIED PER SB 25-442 --No further action required.CONDITION 2: ANY GAL-
LEY FOUND WITHOUT AN
AFFECTED PART NUM- BER PART 2: CLOSE ACCESS- Group 2:
TABLE 2: GALLEY WIRE BUNDLE PROTECTIVE WRAP REPLACEMENT Refer to the listed procedures in SB 737-25A1876 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition Get access to the passenger compartment.
-OPTION 1: Do an Inspection of Galley G1, G2 and G4B to find the part number.
All Airplanes.
APPENDIX B- -APPENDIX A -APPENDIX AOPTION 2: Do a maintenance records check of Galley G1, G2 and G4B to find the part number.
APPENDIX C-Adjacent to the galley identification placard, inspect for an existing galley modification placard. Do an Inspection of the modification placard.
CONDITION 3: ANY GAL-
LEY FOUND WITH AN AF-
FECTED PART NUMBER Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 11 of 13 REQUIREMENTS BULLETIN 737-25A1876
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Group 2:
TABLE 2: GALLEY WIRE BUNDLE PROTECTIVE WRAP REPLACEMENT Refer to the listed procedures in SB 737-25A1876 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition PART 1: GALLEY WIRE
BUNDLE PROTECTIVE
WRAP REPLACEMENT -Replace galley wire bundle spiral wrap protective sleeving with the BMS 13- 81 wire protective sleeving.
CONDITION 3.1: ANY
GALLEY FOUND WITH-
OUT MODIFICATION
PLACARD INSTALLED OR
ANY GALLEY FOUND
WITH MODIFICATION
PLACARD INSTALLED
NOT MARKED AS MODI- FIED PER SB 25-442 --No further action required.CONDITION 3.2: ANY
GALLEY FOUND WITH
MODIFICATION PLACARD
INSTALLED MARKED AS MODIFIED PER SB 25-442 --No further action required.CONDITION 4: ANY GAL-
LEY FOUND WITHOUT AN
AFFECTED PART NUM- BER PART 2: CLOSE ACCESS- Export Controlled ECCN: 9E991 See page 1 for details Original Issue: September 01, 2023 737-25A1876 RB 12 of 13 REQUIREMENTS BULLETIN 737-25A1876