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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-22A1211 Original Issue: April 13, 2010 ATA System: 2200 SUBJECT: AUTOFLIGHT - Digital Flight Control System - Flight Control Computer Software Change 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BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2010 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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: April 13, 2010 737-22A1211 1 of 18
3.0
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Table of Contents
Summary5
1. PLANNING INFORMATION7
A. Effectivity7
1. Airplanes7
2. Spares Affected ........................................ 1 1 B. Concurrent Requirements ...................................... 1 1 C. Reason ................................................ 1 1 D. Description .............................................. 1 2 E. Compliance .............................................. 1 2 F. Approval ............................................... 1 2 G. Manpower .............................................. 1 2 H. Weight and Balance Changes .................................... 1 3 I. Electrical Load Data ......................................... 1 3 J. References .............................................. 1 3
1. Existing Data .......................................... 1 3
2. Data supplied with this Service Bulletin ............................ 1 3
3. Installation Drawings Used in the Preparation of this Service Bulletin ............ 1 3 K. Publications Affected ........................................ 1 3 L. Interchangeability and Intermixability of Parts ........................... 1 4
2. MATERIAL INFORMATION ........................................ 1 5 A. Material - Price and Availability ................................... 1 5 B. Industry Support Information .................................... 1 5 C. Parts Necessary For Each Airplane ................................. 1 5
1. Kits/Parts ............................................ 1 5
2. Parts and Materials Supplied by the Operator ........................ 1 5
3. Parts Modified and Reidentified ................................ 1 5
4. Parts Removed and Not Replaced .............................. 1 5 D. Parts Necessary to Change Spares ................................. 1 6 E. Special Tooling - Price and Availability ............................... 1 6 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 6
3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 7 A. GENERAL INFORMATION ..................................... 1 7 B. WORK INSTRUCTIONS ....................................... 1 7
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Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-22A1211Original Issue: April 13, 2010 ATA System: 2200 SUBJECT: AUTOFLIGHT - Digital Flight Control System - Flight Control Computer Software Change
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 do a part number check of the Flight Control Computer (FCC) Operational Program Software (OPS) installed in the Flight Control Computers. If the software part number is not 2276-COL-AC1-05 (P4.0) or 2275-COL-AC1-06 (P5.0), new software must be installed. The new software will reduce the incidence of unflagged Radio Altimeter outputs that cause a premature autothrottle landing retard.As a result of in-service incidents, it was found that an erroneous unflagged Captain's Radio Altimeter output will cause the autothrottle to enter Landing Flare Retard mode prematurely on approach. If this change is not done, an erroneous unflagged Captain's 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.
For more information refer to Boeing Service letters (SL) 737-SL-22-057 and 737-SL-22-059, which are related to this service bulletin.
Fleet Team Digest (FTD) 737NG FTD 34-09008 is related to this service bulletin.
Boeing Service Related Problem (SRP) 737-SRP-22-0032 is related to this service bulletin.
ACTION Do a part number check of the Flight Control Computers (FCC) Operational Program Software (OPS). If the software part number installed is not part number 2276-COL-AC1-05 or 2275-COL-AC1-06, install new software.
EFFECTIVITY 737-600/-700/-700C/-800/-900 Airplanes. Refer to Paragraph 1.A., Effectivity, Airplanes, for the list of affected airplanes.
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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 90 days 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
1.001.00All
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability
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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-22A1211 Original Issue: April 13, 2010 ATA System: 2200 SUBJECT: AUTOFLIGHT - Digital Flight Control System - Flight Control Computer Software Change
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 Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP 737 Airplanes without Fight Control Conputer Operational Program Software part number 2276-COL-AC1-05 or 2275-COL-AC1-06 installed -1 Airplane Models:
737-600, 737-700, 737-700C, 737-800, 737-900 GroupVariable Number 1YA129 - YA199 1YA372 - YA377 1YA630 - YA631 1YA642 1YA666 - YA667 1YA709 - YA710
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GroupVariable Number 1YA859 - YA862 1YA971 - YA978 1YB120 - YB132 1YB156 - YB158 1YB163 - YB164 1YB184 1YB208 1YB371 - YB391 1YB522 - YB526 1YB541 - YB544 1YB567 - YB598 1YB606 - YB632 1YB651 1YB656 1YB851 - YB863 1YB871 - YB874 1YB881 - YB890 1YB901 - YB903 1YB911 1YB961 - YB964 1YC083 1YC170 1YC186 - YC189 1YC201 - YC203 1YC206 - YC207 1YC305 1YC384 - YC387 1YC393 - YC394 1YC742 - YC743 1YD007 1YD056 - YD057 1YD108 - YD110 1YD156 - YD159
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GroupVariable Number 1YD218 - YD219 1YD261 1YD331 - YD334 1YD412 - YD414 1YD484 - YD485 1YD491 - YD495 1YD508 - YD512 1YD535 1YD561 - YD564 1YD571 - YD572 1YD591 - YD595 1YD651 - YD655 1YE205 - YE206 1YE321 - YE326 1YE371 - YE379 1YG091 - YG096 1YG101 - YG102 1YG202 - YG205 1YG211 - YG213 1YG507 - YG509 1YJ003 - YJ005 1YJ011 - YJ013 1YJ021 1YJ480 1YJ531 - YJ553 1YJ591 - YJ594 1YJ677 - YJ685 1YJ690 - YJ693 1YJ805 - YJ867 1YJ901 - YJ902 1YJ911 - YJ928 1YJ931 - YJ936 1YJ941 - YJ947
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GroupVariable Number 1YK001 - YK007 1YK101 - YK104 1YK111 - YK112 1YK121 - YK122 1YK131 - YK132 1YK136 - YK137 1YK141 - YK142 1YK146 - YK147 1YK151 - YK154 1YK161 - YK162 1YK301 - YK305 1YK321 - YK332 1YK361 - YK369 1YK401 - YK406 1YK426 - YK427 1YK431 - YK436 1YK456 - YK460 1YK476 1YK480 - YK484 1YK511 - YK514 1YK551 - YK563 1YK571 1YK601 - YK602 1YK611 - YK613 1YK621 - YK623 1YK631 1YK641 - YK642 1YK701 - YK707 1YK801 - YK818 1YK901 - YK906 1YK941 1YL001 - YL004 1YL011
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GroupVariable Number 1YM101 - YM103 1YM201 - YM211 1YM251 - YM297 1YM471 1YM481 - YM484 1YM501 - YM507 1YM521 - YM522 1YM541 1YM551 - YM553 1YM571 - YM572 1YM591 - YM593 1YN001 - YN006 1YN061 1YN101 - YN105
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason This service bulletin gives instructions to do a part number check of the Flight Control Computer (FCC) Operational Program Software (OPS) installed in the Flight Control Computers. If the software part number is not 2276-COL-AC1-05 (P4.0) or 2275-COL-AC1-06 (P5.0), new software must be installed.
The new software will reduce the incidence of unflagged Radio Altimeter outputs that cause a premature autothrottle landing retard.As a result of in-service incidents, it was found that an erroneous unflagged Captain's Radio Altimeter output will cause the autothrottle to enter Landing Flare Retard mode prematurely on approach. If this change is not done, an erroneous unflagged Captain's 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.
For more information refer to Boeing Service letters (SL) 737-SL-22-057 and 737-SL-22-059, which are related to this service bulletin.
Fleet Team Digest (FTD) 737NG FTD 34-09008 is related to this service bulletin.
Boeing Service Related Problem (SRP) 737-SRP-22-0032 is related to this service bulletin.
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D. Description Inspect the part number of the Flight Control Computer (FCC) Operational Program Software (OPS).
If the software part number installed is not part number 2276-COL-AC1-05 or 2275-COL-AC1-06, install new software.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 212737-600, 737-700, 737-700C, 737-800, 737-900 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 90 days after the original issue date of 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.
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.
NOTE: This estimate gives general service bulletin incorporation time. The specific software data transfer times can be found in 737-600/700/800/900 AMM 20-15-11.
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