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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-22A1215 Original Issue: November 22, 2013 ATA System: 2231 SUBJECT: AUTOFLIGHT - Autothrottle System - Autothrottle Computer Replacement 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 © 2013 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Unpublished Work.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, 2013 737-22A1215 1 of 22
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 2 of 22 BOEING SERVICE BULLETIN 737-22A1215
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Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected ........................................ 1 4 B. Concurrent Requirements ...................................... 1 4 C. Reason ................................................ 1 4 D. Description .............................................. 1 4 E. Compliance .............................................. 1 5 F. Approval ............................................... 1 5 G. Manpower .............................................. 1 5 H. Weight and Balance Changes .................................... 1 6 I. Electrical Load Data ......................................... 1 6 J. References .............................................. 1 6
1. Existing Data: ......................................... 1 6
2. Data Supplied with this Service Bulletin: ........................... 1 6
3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 6 K. Publications Affected ........................................ 1 6 L. Interchangeability and Intermixability of Parts ........................... 1 7 M. Software Accomplishment Summary ................................ 1 7
2. MATERIAL INFORMATION ........................................ 1 9 A. Material - Price and Availability ................................... 1 9 B. Industry Support Information .................................... 1 9 C. Parts Necessary for Each Airplane ................................. 1 9
1. Kits/Parts ............................................ 1 9
2. Parts and Materials Supplied by the Operator ........................ 1 9
3. Parts Modified and Reidentified ................................ 2 0
4. Parts Removed and Not Replaced .............................. 2 0 D. Parts Necessary to Change Spares ................................. 2 0 E. Special Tooling - Price and Availability ............................... 2 0 F. Special Tooling Necessary to do this Service Bulletin ....................... 2 0
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 1 A. GENERAL INFORMATION ..................................... 2 1 B. WORK INSTRUCTIONS ....................................... 2 2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 3 of 22 BOEING SERVICE BULLETIN 737-22A1215
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Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 4 of 22 BOEING SERVICE BULLETIN 737-22A1215
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-22A1215Original Issue: November 22, 2013 ATA System: 2231 SUBJECT: AUTOFLIGHT - Autothrottle System - Autothrottle Computer Replacement
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 instructions to change the GE Autothrottle Computer. The new GE Autothrottle Computer, part number 760SUE2-5, has new software installed. The new software will prevent a single erroneous but valid radio altitude signal from causing the autothrottle to decrease thrust. A decrease in thrust could prevent a continued safe flight and landing.
As a result of in-service incidents, it was found that an erroneous unflagged Radio Altimeter output would cause the autothrottle to enter Landing Flare Retard mode prematurely on approach. If this change is not done, an erroneous unflagged Radio Altimeter output on a manual or single channel autopilot approach could result in premature Autothrottle Landing Flare Retard and the loss of automatic speed control.
Boeing Service Related Problem (SRP) 737NG-SRP-22-0032 is related to this service bulletin.
As a part of a service bulletin remote certification program, this change was completed on airplane YA104 by Service Bulletin 737-22A1215 RC01 before the Original Issue of this service bulletin. The change completed on airplane YA104 by Service Bulletin 737-22A1215 RC01 is equivalent to the Original Issue of this service bulletin.
Airplane YA104 has the configuration of a Group 1 airplane.
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 AffectedYesSpares Affected Paragraph 1.E., ComplianceYesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 5 of 22
ReferenceAffectedPlanning Data 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/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION (PRR 38275-168RS) Get access to the main electronics compartment. At the E1-1 electronics shelf, change the Autothrottle Computer.
Do an operational test of the Autothrottle system.
EFFECTIVITY 737-600/-700/-700C/-800/-900 Airplane(s). 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.
Boeing recommends that the change given in this service bulletin be done within 36 months after the original issue 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
1.001.00Group 1
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: November 22, 2013 737-22A1215 6 of 22 BOEING SERVICE BULLETIN 737-22A1215
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BOEING SERVICE BULLETIN 737-22A1215
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ELECTRONIC
EQUIPMENT RACK, E1
ELECTRONIC EQUIPMENT ACCESS DOOR, 117A
REPLACE THE
AUTOTHROTTLE
COMPUTER
ELECTRONIC
EQUIPMENT ACCESS DOOR, 117A 000 00 FWD E1 ELECTRONIC EQUIPMENT RACK 2152850 Original Issue: November 22, 2013 Export Controlled ECCN: 9E991 - BOEING 737-22A1215 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 22
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 8 of 22 BOEING SERVICE BULLETIN 737-22A1215
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-22A1215 Original Issue: November 22, 2013 ATA System: 2231 SUBJECT: AUTOFLIGHT - Autothrottle System - Autothrottle Computer Replacement
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 Refer to Service Bulletin Index D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplane(s) shown below. Refer to PRR 38275-168RS for data about this change.
DESCRIPTIONCONFIGURATIONGROUP 737 Airplanes with GE Autothrottle Computer part number 760SUE1-1 or 760SUE2-2 or 760SUE2-3 or 760SUE2-4 or 10-62017-51 or 10-62017-52 or 10-62017-53 or 10-62017-54 installed -1 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900 GroupVariable Number 1YA001 - YA099 1YA101 - YA128 1YA201 - YA211 1YA221 1YA231 - YA242 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 9 of 22
GroupVariable Number 1YA251 - YA256 1YA271 - YA272 1YA291 1YA301 - YA302 1YA311 - YA314 1YA321 - YA323 1YA336 - YA345 1YA351 1YA356 - YA357 1YA366 - YA367 1YA371 1YA501 - YA536 1YA541 - YA552 1YA571 - YA578 1YA601 - YA615 1YA621 - YA622 1YA626 - YA629 1YA635 - YA636 1YA641 1YA645 - YA650 1YA656 - YA659 1YA671 - YA672 1YA681 - YA691 1YA701 - YA708 1YA721 - YA722 1YA731 - YA734 1YA751 - YA756 1YA801 - YA803 1YA809 1YA811 - YA814 1YA831 - YA835 1YA841 - YA858 1YA881 - YA882 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 10 of 22 BOEING SERVICE BULLETIN 737-22A1215
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GroupVariable Number 1YA891 - YA892 1YA961 - YA970 1YB001 - YB006 1YB101 - YB119 1YB151 - YB153 1YB161 - YB162 1YB171 - YB172 1YB181 - YB183 1YB201 - YB207 1YB271 1YB276 1YB301 - YB310 1YB501 - YB502 1YB521 1YB551 1YB561 - YB566 1YB601 - YB605 1YC001 - YC030 1YC051 - YC082 1YC091 - YC094 1YC101 - YC104 1YC111 - YC113 1YC121 1YC126 - YC127 1YC136 - YC141 1YC146 - YC147 1YC151 - YC156 1YC166 - YC169 1YC171 1YC176 - YC178 1YC301 - YC304 1YC321 - YC383 1YC391 - YC392 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 11 of 22 BOEING SERVICE BULLETIN 737-22A1215
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GroupVariable Number 1YC396 1YC401 - YC417 1YC421 - YC422 1YC426 - YC428 1YC436 - YC437 1YC441 - YC448 1YC451 - YC455 1YC459 1YC461 - YC467 1YC471 - YC499 1YC501 - YC526 1YC571 - YC583 1YC587 - YC589 1YC591 - YC593 1YC601 - YC655 1YC681 - YC696 1YC701 - YC715 1YC720 - YC725 1YC727 - YC741 1YC751 - YC752 1YC761 - YC770 1YC781 - YC793 1YC801 - YC892 1YC901 - YC907 1YC921 - YC922 1YC931 - YC932 1YC941 - YC951 1YC971 - YC978 1YC981 - YC983 1YD001 - YD006 1YD021 - YD025 1YD041 - YD055 1YD081 - YD084 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: November 22, 2013 737-22A1215 12 of 22 BOEING SERVICE BULLETIN 737-22A1215