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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-26A1137 Original Issue: May 22, 2014 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection 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 © 2014 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Unpublished Work.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: May 22, 2014 737-26A1137 1 of 37
2.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 2 of 37 BOEING SERVICE BULLETIN 737-26A1137
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 2 8 B. Concurrent Requirements ...................................... 2 8 C. Reason ................................................ 2 8 D. Description .............................................. 2 9 E. Compliance .............................................. 2 9 F. Approval ............................................... 3 0 G. Manpower .............................................. 3 0 H. Weight and Balance Changes .................................... 3 1 I. Electrical Load Data ......................................... 3 1 J. References .............................................. 3 1
1. Existing Data: ......................................... 3 1
2. Data Supplied with this Service Bulletin: ........................... 3 1
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 3 1 K. Publications Affected ........................................ 3 1 L. Interchangeability and Intermixability of Parts ........................... 3 2 M. Software Accomplishment Summary ................................ 3 2
2. MATERIAL INFORMATION ........................................ 3 3 A. Material - Price and Availability ................................... 3 3 B. Industry Support Information .................................... 3 3 C. Parts Necessary for Each Airplane ................................. 3 3
1. Kits/Parts: ........................................... 3 3
2. Parts and Materials Supplied by the Operator: ........................ 3 3
3. Parts Modified and Reidentified: ............................... 3 3
4. Parts Removed and Not Replaced: .............................. 3 3 D. Parts Necessary to Change Spares ................................. 3 3 E. Special Tooling - Price and Availability ............................... 3 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 3 3
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 5 A. GENERAL INFORMATION ..................................... 3 5 B. WORK INSTRUCTIONS ....................................... 3 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 3 of 37 BOEING SERVICE BULLETIN 737-26A1137
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 4 of 37 BOEING SERVICE BULLETIN 737-26A1137
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-26A1137Original Issue: May 22, 2014 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection
THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
CONCURRENT REQUIREMENTS Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND This service bulletin gives instructions to do the Smoke Clearance Mode - Operational Test at the repeat intervals on airplanes equipped with the reconfigured low pressure air distribution system during a cargo fire event. The repeat operational testing of the Equipment Cooling System and Low Pressure Environmental Control System (ECS) will reduce the probability of a latent failure which could result in smoke and/or fire in the airplane.
A subsequent review by Boeing found that there was no maintenance procedure available to inspect the components used to reconfigure the air distribution system. Without the maintenance procedure, failures of components could possibly be latent for periods greater than required to meet certification requirements. A cargo fire event in conjunction with a latent failure of the air distribution system can possibly result in smoke penetration to occupied areas. The amount of smoke and toxicity of the smoke that could reach the occupied areas is unknown.
Boeing Service Bulletins 737-26-1121 and either 737-21-1135 or 737-21-1163 are related to 737-26-1122.
Accomplishment of the changes in the Boeing Service Bulletins 737-26-1121, 737-21-1135 or 737-21-1163 will not cause a failure of the test in this service bulletin. Boeing Service Bulletin 737-26A1083 is related to 737-21-1135.
Boeing Service Related Problem (SRP) 737-SRP-26-0079 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 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 5 of 37
ReferenceAffectedPlanning Data 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 AffectedYesPublications Affected Paragraph 1.K., Publications AffectedYesAirplane 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 NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Get access into the flight compartment and main electronics equipment compartment. As an alternate location to the flight compartment to make sure of the Recirculation Fan's operation, between the left and right air conditioning (AC) pack compartments, open the access panel to the ground conditioned air connection duct.
Do the Smoke Clearance Mode - Operational Test to make sure the cargo smoke system operates correctly. If the Smoke Clearance Mode - Operational Test result is not satisfactory, do the troubleshooting procedure on the Equipment Cooling and Low Pressure ECS systems to find and replace faulty component.
EFFECTIVITY All 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Airplanes. Refer to Paragraph 1.A., Effectivity, for the list of affected airplanes.
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 Operational Test given in this service bulletin.
MANPOWER Elapsed HoursTotal Task HoursAirplanes
2.504.00Each 737 Airplane Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 6 of 37 BOEING SERVICE BULLETIN 737-26A1137
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MATERIAL INFORMATION None.
Original Issue: May 22, 2014 BOEING SERVICE BULLETIN 737-26A1137 ALERT
IN FLIGHT COMPARTMENT AND MAIN ELECTRONICS COMPARTMENT:
-DO SMOKE CLEARANCE MODE
OPERATIONAL TEST -IF TEST RESULTS NOT SATISFACTORY,
TROUBLESHOOT SYSTEM COMPONENTS BELOW AC MIX AIR COMPARTMENT:
-AS AN ALTERNATE LOCATION TO FLIGHT
COMPARTMENT TO MAKE SURE OF RECIRCULATION FAN'S OPERATION, OPEN ACCESS PANEL 191E -MAKE SURE THERE IS AIR FLOW DURING SMOKE
CLEARANCE MODE TEST 2302407 Export Controlled ECCN: 9E991 - BOEING 737-26A1137 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 37
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 8 of 37 BOEING SERVICE BULLETIN 737-26A1137
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-26A1137 Original Issue: May 22, 2014 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection
THIS BULLETIN 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 SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER, line numbers 1 through 9999 in three Groups. The Variable Numbers and Group Information for the applicable airplanes is given below.
Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
NOTE: Variable numbers for airplanes scheduled to be delivered more than a year after the Original Issue date of this service bulletin are not listed in the table below. MyBoeingFleet (MBF) will show current listing of the affected airplanes.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 5263.
Affected airplanes after Line Number 5263 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 9 of 37
DESCRIPTIONCONFIGURATIONGROUP 737-600/-700/-800 Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122 -1 737-600/-700/-800 Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122 and Had Not Accomplished Boeing Service Bulletin 737-26-1122 1 737-600/-700/-800 Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122 and Had Accomplished Boeing Service Bulletin 737-26-1122 2 737-700/-700C/-900 Line Numbers 1 Through 1700 Not Included in Boeing Service Bulletin 737-26-1122 -2 737-600/-700/-700C/-800/-900/-900ER Line Numbers 1701 and All Line Numbers After 1701 -3 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER GroupVariable Number 1YA001 - YA099 1YA101 - YA199 1YA201 - YA211 1YA221 1YA231 - YA242 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 - YA377 1YA501 - YA536 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 10 of 37 BOEING SERVICE BULLETIN 737-26A1137
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GroupVariable Number 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA631 1YA635 - YA636 1YA641 - YA642 1YA645 - YA650 1YA656 - YA659 1YA666 - YA667 1YA671 - YA672 1YA681 - YA691 1YA701 - YA710 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA862 1YA881 - YA882 1YA891 - YA892 1YA961 - YA976 3YA977 - YA978 1YB001 - YB006 1YB101 - YB132 1YB151 - YB153 1YB156 - YB157 3YB158 1YB161 - YB164 1YB171 - YB172 1YB181 - YB184 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 11 of 37 BOEING SERVICE BULLETIN 737-26A1137
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GroupVariable Number 1YB201 - YB208 1YB271 1YB276 1YB301 - YB310 1YB371 - YB380 3YB381 - YB392 1YB501 - YB502 1YB521 - YB525 3YB526 1YB541 - YB544 1YB551 1YB561 - YB573 3YB574 - YB580 1YB581 - YB586 3YB587 - YB598 1YB601 - YB629 3YB630 1YB631 - YB632 3YB633 - YB636 1YB651 1YB656 3YB671 - YB672 1YB851 - YB859 3YB860 1YB861 - YB863 1YB871 - YB873 3YB874 1YB881 - YB888 3YB889 - YB893 1YB901 - YB903 1YB911 3YB961 - YB975 3YB981 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137 12 of 37 BOEING SERVICE BULLETIN 737-26A1137