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Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION Number: 747-35-2134 Original Issue: November 22, 2017 ATA System: 3521 SUBJECT: OXYGEN - Passenger Oxygen System - Low Pressure Oxygen System Hose Assembly Replacement and Hose Assembly 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:
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Unpublished Work.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: November 22, 2017 747-35-2134 1 of 90
4.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 2 of 90 BOEING SERVICE BULLETIN 747-35-2134
BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected11
B. Concurrent Requirements11
C. Reason12
D. Description12
E. Compliance13
F. Approval15
G. Manpower15
H. Weight and Balance Changes19
I. Electrical Load Data19
J. References19
1. Existing Data:19
2. Data Supplied with this Service Bulletin:20
3. Installation Drawings Used in the Preparation of this Service Bulletin:20
K. Publications Affected20
L. Interchangeability and Intermixability of Parts20
M. Software Accomplishment Summary21
2. MATERIAL INFORMATION23
A. Material - Price and Availability23
B. Industry Support Information25
C. Parts Necessary for Each Airplane25
1. Kits/Parts25
2. Parts and Materials Supplied by the Operator27
3. Parts Modified and Reidentified27
4. Parts Removed and Not Replaced27
D. Parts Necessary to Change Spares27
E. Special Tooling - Price and Availability27
F. Special Tooling Necessary to do this Service Bulletin27
3. ACCOMPLISHMENT INSTRUCTIONS29
A. GENERAL INFORMATION29
B. WORK INSTRUCTIONS31
FIGURE 1: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 1]36
FIGURE 2: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 2]39
FIGURE 3: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 3]42
FIGURE 4: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 4]45
FIGURE 5: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 5]48
FIGURE 6: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 6]51
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 3 of 90 BOEING SERVICE BULLETIN 747-35-2134
FIGURE 7: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 7]55
FIGURE 8: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 8]59
FIGURE 9: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 9]62
FIGURE 10: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 10]65
FIGURE 11: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 11]69
FIGURE 12: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 12]73
FIGURE 13: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 13]77
FIGURE 14: MAIN DECK PASSENGER COMPARTMENT, ABOVE CEILING - LOW PRESSURE OXYGEN
SYSTEM FLEXIBLE HOSE ASSEMBLIES - REPLACEMENT [Group 15]81
FIGURE 15: UPPER DECK AND MAIN DECK PASSENGER COMPARTMENTS, ABOVE CEILING - LOW
PRESSURE OXYGEN HOSE ASSEMBLY - GENERAL VISUAL INSPECTION84
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 1: LOW PRESSURE
OXYGEN SYSTEM INSPECTION AND FLEXIBLE HOSE ASSEMBLIES REPLACEMENT
[Group 1-13, 15]85
APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 2: LOW PRESSURE
OXYGEN HOSE ASSEMBLY INSPECTION [Group 14]86
APPENDIX C: LOW PRESSURE OXYGEN HOSE ASSEMBLY CLEARANCES87
APPENDIX D: PART DEMAND INTENT90
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 4 of 90 BOEING SERVICE BULLETIN 747-35-2134
Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 747-35-2134Original Issue: November 22, 2017 ATA System: 3521 SUBJECT: OXYGEN - Passenger Oxygen System - Low Pressure Oxygen System Hose Assembly Replacement and Hose Assembly Inspection BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of this service bulletin will remove the possibility that the low pressure oxygen system is electrically conductive. Oxygen hose assemblies that have the possibility of being electrically conductive supply a path to ground when minimum clearances are not kept during the occurrence of an electrical fault. If this service bulletin is not done the low-pressure oxygen flex hoses can potentially be conductive, become heated from electrical faults and cause or contribute to an oxygen-fed fire event in the passenger cabin.
As a result of a fire in the flight deck of a 777 airplane which was suspected to be caused by the crew oxygen system, the crew and gaseous passenger oxygen systems on the 777 airplane were updated to remove any flexible hose assemblies that were not explicitly non-conductive. While no fire caused by a gaseous oxygen system has been reported on a 747 airplane, as an extra precaution flexible conductive hose assemblies in select locations are being replaced with non-conductive hose assemblies to make sure that in the event of an electrical fault, such as an unintended short circuit, it will not be possible for oxygen system to give a path to ground.
The service bulletin provides instructions to replace specified flexible hose assemblies with non-conductive flexible hose assemblies at multiple locations to make sure that if there is an electrical fault there will not be a direct path to ground through the passenger oxygen system. This service bulletin also gives instructions to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems.
Boeing Service Related Problem (SRP) 747-SRP-35-0063 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 35-14003 is related to this service bulletin.
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 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 5 of 90
ReferenceAffectedPlanning Data Paragraph 1.E., ComplianceYesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications 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/PartsYesKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION (PRR 85901-147RS) Group 1-13, 15:
Get access to the low pressure oxygen system above the ceiling of the main deck and upper deck passenger compartments. Replace specified conductive hose assemblies with non-conductive ones. Do a general visual inspection of low pressure oxygen system to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems. Test the low pressure oxygen system.
Group 14:
Get access to the low pressure oxygen system above the ceiling of the main deck and upper deck passenger compartments. Do a general visual inspection of low pressure oxygen system to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems. If equipment was disconnected, test the low pressure oxygen system.
EFFECTIVITY 747-200B/300/400 Airplane(s) with a therapeutic oxygen option installed. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
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 configuration changes and inspection procedures given in this service bulletin.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 6 of 90 BOEING SERVICE BULLETIN 747-35-2134
BOEING SERVICE BULLETIN 747-35-2134
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Operators are encouraged to complete the survey provided in APPENDIX D of this service bulletin to help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts.
GROUP 1 THRU 13:
REPLACE SPECIFIED CONDUCTIVE HOSE
ASSEMBLIES WITH NON-CONDUCTIVE
HOSE ASSEMBLIES GROUP 15
REPLACE SPECIFIED CONDUCTIVE HOSE
ASSEMBLIES WITH NON-CONDUCTIVE
HOSE ASSEMBLIES
DO A GENERAL VISUAL INSPECTION OF THE LOW
PRESSURE OXYGEN SYSTEM EQUIPMENT TO
MAKE SURE HOSE ASSEMBLIES HAVE THE
MINIMUM CLEARANCE FROM ADJACENT STRUCTURE AND SYSTEM.
2574542 Original Issue: November 22, 2017 Export Controlled ECCN: 9E991 747-35-2134 Copyright © Unpublished Work - See page 1 for details. 7 of 90
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 8 of 90 BOEING SERVICE BULLETIN 747-35-2134
BLANK PAGE
Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION Number: 747-35-2134 Original Issue: November 22, 2017 ATA System: 3521 SUBJECT: OXYGEN - Passenger Oxygen System - Low Pressure Oxygen System Hose Assembly Replacement and Hose Assembly Inspection BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is applicable to 747-200B/300/400 Airplanes with a therapeutic oxygen option installed, line numbers 292-1331, in 15 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below. Refer to PRR 85901-147RS for data about this change.
DESCRIPTIONCONFIGURATIONGROUP 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-1 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-2 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-3 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-4 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-5 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-6 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 9 of 90
DESCRIPTIONCONFIGURATIONGROUP 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-7 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-8 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-9 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-10 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-11 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-12 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-13 747-400 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-14 747-200B/300 Airplanes delivered with a unique configuration of flexible oxygen hoses for the low pressure oxygen system.
-15 Airplane Models:
747-200B, 747-300, 747-400 GroupVariable Number 15RD131 - RD132 15RD143 14RF001 - RF006 5RM010 10RM036 10RM038 - RM040 2RM096 - RM097 2RM136 - RM145 8RM158 2RM261 - RM264 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 10 of 90 BOEING SERVICE BULLETIN 747-35-2134
GroupVariable Number 9RM331 - RM333 4RM351 - RM355 10RM366 - RM367 3RM426 15RS316 - RS320 1RT102 7RT151 2RT471 2RT474 - RT475 2RT477 - RT479 2RT481 2RT483 - RT487 2RT489 - RT490 2RT494 2RT496 - RT499 11RT552 - RT554 12RT555 - RT556 13RT561 - RT564 13RT566 - RT567 10RT744 10RT748 - RT749 10RU016 - RU017 6RU061 - RU062 2RU121 - RU132
2. Spares Affected None.
B. Concurrent Requirements None.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 11 of 90 BOEING SERVICE BULLETIN 747-35-2134
C. Reason Accomplishment of this service bulletin will remove the possibility that the low pressure oxygen system is electrically conductive. Oxygen hose assemblies that have the possibility of being electrically conductive supply a path to ground when minimum clearances are not kept during the occurrence of an electrical fault. If this service bulletin is not done the low-pressure oxygen flex hoses can potentially be conductive, become heated from electrical faults and cause or contribute to an oxygen-fed fire event in the passenger cabin.
As a result of a fire in the flight deck of a 777 airplane which was suspected to be caused by the crew oxygen system, the crew and gaseous passenger oxygen systems on the 777 airplane were updated to remove any flexible hose assemblies that were not explicitly non-conductive. While no fire caused by a gaseous oxygen system has been reported on a 747 airplane, as an extra precaution flexible conductive hose assemblies in select locations are being replaced with non-conductive hose assemblies to make sure that in the unusual occurrence of an electrical fault, such as an unintended short circuit, it will not be possible for oxygen system to give a path to ground.
The service bulletin provides instructions to replace specified flexible hose assemblies with non-conductive flexible hose assemblies at multiple locations to make sure that if there is an electrical fault there will not be a direct path to ground through the passenger oxygen system. This service bulletin also gives instructions to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems.
Boeing Service Related Problem (SRP) 747-SRP-35-0063 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) 747 FTD 35-14003 is related to this service bulletin.
D. Description Group 1-13, 15:
Get access to the low pressure oxygen system above the ceiling of the main deck and upper deck passenger compartments. Replace specified conductive hose assemblies with non-conductive ones.
Do a general visual inspection of low pressure oxygen system to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems. Test the low pressure oxygen system.
Group 14:
Get access to the low pressure oxygen system above the ceiling of the main deck and upper deck passenger compartments. Do a general visual inspection of low pressure oxygen system to make sure that the oxygen system low pressure hose assemblies have minimum clearance from adjacent structure and systems. If equipment was disconnected, test the low pressure oxygen system.
The work in this service bulletin is done in the maintenance zone(s) given below.
Group 1-14:
Affected Maintenance Zones ZoneModel 211, 212, 223, 224, 225, 226, 231, 232, 243, 244, 253, 254, 263, 264, 273, 274 747-400 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2017 747-35-2134 12 of 90 BOEING SERVICE BULLETIN 747-35-2134