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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-31A1398 Original Issue: January 07, 2010 ATA System: 3126 SUBJECT: INDICATING/RECORDING SYSTEMS - Aural Warning System - Installation Of The Cabin Altitude Warning System And Takeoff Configuration Warning System Lights Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.
This document includes proprietary information owned by The Boeing Company and/or one or more third parties.
Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.
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 the Boeing livery 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.
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Original Issue: January 07, 2010 737-31A1398 1 of 20
4.0
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Original Issue: January 07, 2010 737-31A1398 2 of 20 BOEING SERVICE BULLETIN 737-31A1398
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Table of Contents
Summary5
1. PLANNING INFORMATION7
A. Effectivity7
1. Airplanes7
2. Spares Affected7
B. Concurrent Requirements8
C. Reason8
D. Description8
E. Compliance8
F. Approval8
G. Manpower9
H. Weight and Balance Changes9
I. Electrical Load Data9
J. References9
1. Existing Data9
2. Data supplied with this Service Bulletin9
3. Installation Drawings Used in the Preparation of this Service Bulletin9
K. Publications Affected ........................................ 1 0 L. Interchangeability and Intermixability of Parts ........................... 1 0
2. MATERIAL INFORMATION ........................................ 1 1 A. Material - Price and Availability ................................... 1 1 B. Industry Support Information .................................... 1 1 C. Parts Necessary For Each Airplane ................................. 1 1
1. Kits/Parts ............................................ 1 1
2. Parts and Materials Supplied by the Operator ........................ 1 1
3. Parts Modified and Reidentified ................................ 1 1
4. Parts Removed and Not Replaced .............................. 1 1 D. Parts Necessary to Change Spares ................................. 1 1 E. Special Tooling - Price and Availability ............................... 1 1 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 1
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 3 A. GENERAL INFORMATION ..................................... 1 3 B. WORK INSTRUCTIONS ....................................... 1 3 FIGURE 1: WIRE BUNDLE W066 WIRE ROUTING ........................... 1 6 FIGURE 2: ACTIVATION OF THE CABIN ALTITUDE WARNING AND TAKEOFF CONFIGURATION WARNING LIGHTS ....................................... 1 7 FIGURE 3: REMOVE THE INOP MARKERS AT THE L1304 AND L1316 LIGHT ASSEMBLIES . . . 18 FIGURE 4: L1304 AND L1316 LIGHT ASSEMBLY REFERENCE .................... 2 0
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-31A1398Original Issue: January 07, 2010 ATA System: 3126 SUBJECT: INDICATING/RECORDING SYSTEMS - Aural Warning System - Installation Of The Cabin Altitude Warning System And Takeoff Configuration Warning System Lights
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 None.
BACKGROUND This service bulletin gives the instructions to activate the cabin altitude warning system and takeoff configuration warning lights. Incorporation of this service bulletin will allow the operator to activate the cabin altitude warning system and takeoff configuration warning lights. Activation of these lights will provide a visual indication to the flight crew to be used in conjunction with the existing aural warning horn for cabin altitude and takeoff configuration alerts. The visual warning lights are intended to provide additional notice to crews to prepare a correct takeoff configuration, respond to excessive cabin altitude and avoid confusion between the takeoff configuration and cabin altitude alerts. An unrecognized incorrect takeoff configuration or excessive cabin altitude could prevent a continued safe flight and landing.
ACTION Get access to the flight compartment. Remove the P2-2 panel to get access to the W066 wire bundle located behind the panel. Change the wiring in the W066 wire bundle. Remove the INOP markers from the cabin altitude warning system and takeoff configuration warning lights. Do an operational test of the cabin altitude warning system and takeoff configuration warning lights.
EFFECTIVITY 737-400 Airplanes. Refer to Paragraph 1.A.1., Airplanes 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.
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Original Issue: January 07, 2010 737-31A1398 5 of 20
Boeing recommends that the change given in this service bulletin be done within 36 months after the date of this service bulletin.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
MANPOWER Elapsed HoursTotal Task HoursAirplanes
1.751.75PW234
MATERIAL INFORMATION None.
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Original Issue: January 07, 2010 737-31A1398 6 of 20 BOEING SERVICE BULLETIN 737-31A1398
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-31A1398 Original Issue: January 07, 2010 ATA System: 3126 SUBJECT: INDICATING/RECORDING SYSTEMS - Aural Warning System - Installation Of The Cabin Altitude Warning System And Takeoff Configuration Warning System Lights
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 for the airplanes shown below.
Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
DESCRIPTIONCONFIGURATIONGROUP Airplanes with Cabin Altitude Warning System and Takeoff Configuration Warning System Lights installed and deactivated.
Accomplishment of Boeing Service Bulletin 737-31-1377 deactivated the lights.
-1 Airplane Models:
737-400 GroupVariable Number 1PW234
2. Spares Affected None.
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Original Issue: January 07, 2010 737-31A1398 7 of 20
B. Concurrent Requirements None.
C. Reason This service bulletin gives the instructions to activate the cabin altitude warning system and takeoff configuration warning lights. Incorporation of this service bulletin will allow the operator to activate the cabin altitude warning system and takeoff configuration warning lights. Activation of these lights will provide a visual indication to the flight crew to be used in conjunction with the existing aural warning horn for cabin altitude and takeoff configuration alerts. The visual warning lights are intended to provide additional notice to crews to prepare a correct takeoff configuration, respond to excessive cabin altitude and avoid confusion between the takeoff configuration and cabin altitude alerts. An unrecognized incorrect takeoff configuration or excessive cabin altitude could prevent a continued safe flight and landing D. Description Get access to the flight compartment. Remove the P2-2 panel to get access to the W066 wire bundle located behind the panel. Change the wiring in the W066 wire bundle. Remove the INOP markers from the cabin altitude warning system and takeoff configuration warning lights. Do an operational test of the cabin altitude warning system and takeoff configuration warning lights.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 101, 102737-400 E. 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.
Boeing recommends that the change given in this service bulletin be done within 36 months after the date on this service bulletin.
F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.
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Original Issue: January 07, 2010 737-31A1398 8 of 20 BOEING SERVICE BULLETIN 737-31A1398
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G. Manpower The table below shows an estimate of the task hours necessary to do this change for each airplane.
This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time:
Time to adjust to the workplace Time to schedule the work Time to inspect the work Time to cure the materials Time to make the parts Time to find the tools.
Elapsed HoursTask HoursNumber of Persons Task
0.250.251Open Access
0.500.501Change
0.250.251Close Access
0.750.751Test
1.751.75TOTAL FOR EACH AIRPLANE H. Weight and Balance Changes None.
I. Electrical Load Data Not changed.
J. References
1. Existing Data
a. Standard Overhaul Practices Manual (SOPM) 20-50-05
b. Standard Wiring Practices Manual (SWPM) 20-00-11, 20-10-11, 20-10-12, 20-10-19
c. 737-300/400/500 Wiring Diagram Manual (WDM) 21-33-01, 27-43-01
2. Data supplied with this Service Bulletin None.
3. Installation Drawings Used in the Preparation of this Service Bulletin None.
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Original Issue: January 07, 2010 737-31A1398 9 of 20 BOEING SERVICE BULLETIN 737-31A1398
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K. Publications Affected
1. Publications:
Chapter-SectionPublication Section 2737 FAA Approved Airplane Flight Manual 1-20, 15-10, 15-20737 Flight Crew Operations Manual 31-51737 Maintenance Manual 21-33, 27-43737 Wiring Diagram Manual 31-11737 Illustrated Parts Catalog
2. Damage Tolerance Based Structural Inspections:
Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary.
L. Interchangeability and Intermixability of Parts Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.
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Original Issue: January 07, 2010 737-31A1398 10 of 20 BOEING SERVICE BULLETIN 737-31A1398
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2. MATERIAL INFORMATION A. Material - Price and Availability None.
B. Industry Support Information Boeing warranty remedies are not available for the configuration changes given in this service bulletin.
C. Parts Necessary For Each Airplane
1. Kits/Parts None.
2. Parts and Materials Supplied by the Operator None.
3. Parts Modified and Reidentified None.
4. Parts Removed and Not Replaced None.
D. Parts Necessary to Change Spares None.
E. Special Tooling - Price and Availability None.
F. Special Tooling Necessary to do this Service Bulletin No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.
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Original Issue: January 07, 2010 737-31A1398 11 of 20 BOEING SERVICE BULLETIN 737-31A1398
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