# Boeing Alert Service Bulletin 737-22A1211: No revision named

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- Document: [Boeing Alert Service Bulletin 737-22A1211](https://openairdocs.org/service-documents/boeing/737-22a1211.md)
- Title as filed: U.S. DOT/FAA - Service Information
- Pages: 18
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### Page 1

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Unpublished Work - All Rights Reserved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
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Table of Contents
Summary ...................................................... 5
1. PLANNING INFORMATION ........................................ 7
A. Effectivity ................................................ 7
1. Airplanes ............................................. 7
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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Elapsed HoursTask HoursNumber of PersonsTask
0.500.501Software Inspection
0.500.501Install Software (a)
1.001.00TOTAL FOR EACH AIRPLANE
(a) Only necessary if P4.0 or P5.0 software is not installed.
H. Weight and Balance Changes
None.
I. Electrical Load Data
Not changed.
J. References
1. Existing Data
a. Boeing Service Letter 737-SL-22-057, 737-SL-22-059
b. Boeing Service Related Problem (SRP) 737-SRP-22-0032
c. 737-600/700/800/900 Aircraft Maintenance Manual (AMM) 20-15-11, 22-11-33
d. 737NG Fleet Team Digest (FTD) 34-09008
2. Data supplied with this Service Bulletin
None.
3. Installation Drawings Used in the Preparation of this Service Bulletin
None.
K. Publications Affected
1. Publications:
Chapter-SectionPublication
22-11737 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.
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L. Interchangeability and Intermixability of Parts
Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability
information.
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2.    MATERIAL INFORMATION
A. Material - Price and Availability
The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each
Airplane. As an alternative, operators can purchase the parts from Boeing Spares. This service bulletin
does not show the Boeing price and supply data.
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
NotesSoftware NameSoftware Part NumberMedia Set NameMedia Set Part Num-
ber
(a) (b) (c)
(d) (e) (f)
FCC OPS2276-COL-AC1-05FCC OPS DISK SET831-5854-140
(a) (b) (c)
(d) (e) (f)
(g)
FCC OPS2275-COL-AC1-06FCC OPS DISK SET831-5854-150
(a) This software part number is used in production. Operators may already have this media set.
(b) Do not install previous versions of this software after installation of the new software part number.
(c) Install this software only if the Flight Control Computers part number 822-1604-101 or 822-1604-151 are
installed on the airplane.
(d) The existing media set part number is 831-5854-111 or 831-5854-120 or 831-5854-130.
(e) Only one media set is necessary for each operator.
(f) The media set can be obtained directly from the supplier: Rockwell Collins Aerospace & Electronics Inc.
DRA RC Displays Systems (09344), 400 Collins Road N.E., M/S 133-100 Cedar Rapids, Lowa 52498
(g) This is the preferred software option.
3. Parts Modified and Reidentified
None.
4. Parts Removed and Not Replaced
None.
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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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3.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
CAUTION: KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL
PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL,
METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE
DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR
OTHER ELECTRICAL DAMAGE.
NOTE: 1. The instructions identified in Paragraph 3.B., Work Instructions give the recommended
sequence of steps.
2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for
definition of the acronyms.
3. Obey all of the warnings and cautions given in the specified manual sections.
4. These work instructions refer to procedures included in other Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative
procedure, the accepted alternative procedure can be used. When the words "in
accordance with" are included in the instruction, the procedure in the Boeing document
must be used.
5. Refer to 737-600/700/800/900 AMM 20-15-11 for on-airplane software installation
maintenance practices and data transfer times as accepted procedures.
B. WORK INSTRUCTIONS
1. Get access to the flight deck and do the Software Installation Test from the Flight Management
Computer System (FMCS) Computer Display Unit (CDU). Refer to 737-600/700/800/900 AMM
22-11-33 as an accepted procedure.
2. Inspect the Flight Control Computers (FCC) Operational Program Software (OPS) part numbers.
a. If the software part number is listed in Table 1 below, install new software. Refer to
737-600/700/800/900 AMM 22-11-33 as an accepted procedure.
Table 1
Reference Version
Number
Diskette Set - Rockwell
Collins Part Number
Diskette Set - Boeing
Part Number
Operation Program
Software Part Number
P1.1831-5854-111S241A100-5022271-COL-AC1-02
P2.0831-5854-120S241A100-5032270-COL-AC1-03
P3.0831-5854-130S241A100-5042277-COL-AC1-04
b. If the software part number is listed in Table 2 below, no more work is necessary.
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Table 2
Reference Version
Number
Diskette Set - Rockwell
Collins Part Number
Diskette Set - Boeing
Part Number
Operation Program
Software Part Number
P4.0831-5854-140S241A100-5052276-COL-AC1-05
P5.0831-5854-150S241A100-5062275-COL-AC1-06 (a)
(a) Software part number 2275-COL-AC1-06 is the preferred software option.
3. Put the airplane back to a serviceable condition.
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