Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-22A1224

Original Issue: May 18, 2012

ATA System: 2211

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 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.

ECCN: 9E991

BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET

Copyright © 2012 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Unpublished Work.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, DreamlinerTM,

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT

BLANK PAGE
Table of Contents

Summary ...................................................... 5

1. PLANNING INFORMATION ........................................ 7

A. Effectivity ................................................ 7

1. Airplanes ............................................. 7

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 20

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 21

3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 22

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT

BLANK PAGE
Commercial 

Airplanes 737

Service Bulletin

ALERT

Summary Number: 737-22A1224

Original Issue: May 18, 2012

ATA System: 2211

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

2274-COL-AC1-07 (P6.0), new software must be installed. If this change is not done, an erroneous but valid

Radio Altimeter (RA) signal can cause the airplane to go into the Flare Retard mode at the incorrect time.

In the event of a Low Range Radio Altimeter (LRRA) failure, the new software will disable the Autothrottle Flare

Retard mode during manually controlled landings. This will happen if a difference between the RA signals of

more than 20 feet continues for more than two seconds on approach. The software is also changed such that

the Flare Retard mode will change to ARM mode if the throttles are manually advanced while in this mode.

Landings with the Autopilot engaged are unchanged and the Autothrottle Flare Retard mode will operate normally.

Additional changes are also made to the interface between the Autothrottle and the Autothrottle Servo Motors

and to reduce the incidence of nuisance No Fault Found.

Boeing Service Related Problem (SRP) 737NG-SRP-22-0032 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 737NG FTD 34-09008 is related to this service bulletin.

ACTION (PRR 38275-175S)

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 2274-COL-AC1-07, install new software.

EFFECTIVITY

737-600/-700/-700C/-800/-900/-900ER Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected

airplanes.

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COMPLIANCE

Boeing recommends that the change given in this service bulletin be done within 12 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

Airplanes Total Task Hours Elapsed Hours

All 1.00 1.00

MATERIAL INFORMATION

Operator Supplied Parts/Materials.

Refer to Paragraph 2.A., Material - Price and Availability.

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Commercial 

Airplanes 737

Service Bulletin

ALERT

Number: 737-22A1224

Original Issue: May 18, 2012

ATA System: 2211

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 D6-19567 Part 3 for Airplane Variable Number, Line Number, and

Serial Number data.

This service bulletin is for the airplanes shown below. An equivalent change is on subsequent

production airplanes. Refer to PRR 38275-175S for data about this change.

GROUP CONFIGURATION DESCRIPTION

737 Airplanes that were delivered with Rockwell Collins Flight Control

Computers without Operational Program Software part number

2274-COL-AC1-07 installed

1 -

Airplane Models:

737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER

Variable Number Group

YA129 - YA199 1

YA372 - YA377 1

YA630 - YA631 1

YA642 1

YA666 - YA667 1

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Variable Number Group

YA709 - YA710 1

YA859 - YA862 1

YA971 - YA978 1

YB120 - YB132 1

YB156 - YB158 1

YB163 - YB164 1

YB184 1

YB208 1

YB371 - YB392 1

YB522 - YB526 1

YB541 - YB544 1

YB567 - YB598 1

YB606 - YB635 1

YB651 1

YB656 1

YB671 - YB672 1

YB851 - YB863 1

YB871 - YB874 1

YB881 - YB893 1

YB901 - YB903 1

YB911 1

YB961 - YB975 1

YB981 1

YB986 - YB998 1

YC083 - YC084 1

YC095 1

YC170 1

YC179 1

YC186 - YC190 1

YC201 - YC203 1

YC206 - YC207 1

YC305 1

YC384 - YC387 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YC393 - YC394 1

YC438 - YC439 1

YC742 - YC750 1

YD007 1

YD056 - YD057 1

YD108 - YD117 1

YD156 - YD159 1

YD218 - YD219 1

YD261 1

YD331 - YD334 1

YD412 - YD419 1

YD484 - YD485 1

YD491 - YD499 1

YD508 - YD512 1

YD535 1

YD561 - YD564 1

YD571 - YD572 1

YD591 - YD595 1

YD651 - YD655 1

YE205 - YE206 1

YE321 - YE326 1

YE371 - YE383 1

YF001 - YF011 1

YF021 - YF049 1

YF051 - YF067 1

YF086 - YF087 1

YF106 - YF107 1

YF111 - YF114 1

YF116 - YF119 1

YF121 - YF132 1

YF176 - YF178 1

YF191 - YF192 1

YF201 - YF276 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YF401 - YF402 1

YF431 - YF432 1

YF436 - YF437 1

YF441 - YF442 1

YF451 - YF460 1

YF501 - YF599 1

YF601 - YF650 1

YF701 - YF707 1

YF801 - YF805 1

YF831 - YF832 1

YF836 - YF838 1

YF901 - YF905 1

YF921 - YF928 1

YF951 - YF954 1

YG091 - YG099 1

YG101 - YG104 1

YG111 - YG114 1

YG116 - YG134 1

YG202 - YG205 1

YG211 - YG214 1

YG221 - YG224 1

YG251 - YG252 1

YG507 - YG512 1

YG701 1

YG711 1

YH001 - YH012 1

YH031 - YH055 1

YH071 - YH080 1

YH101 - YH132 1

YH201 - YH202 1

YH206 - YH207 1

YH301 - YH306 1

YH321 - YH322 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YH501 - YH519 1

YH551 - YH558 1

YH601 - YH603 1

YH611 - YH615 1

YH631 - YH632 1

YH641 1

YJ003 - YJ013 1

YJ021 1

YJ480 1

YJ531 - YJ579 1

YJ591 - YJ599 1

YJ677 - YJ694 1

YJ805 - YJ867 1

YJ872 - YJ880 1

YJ901 - YJ904 1

YJ908 - YJ929 1

YJ931 - YJ937 1

YJ941 - YJ956 1

YJ961 1

YJ976 - YJ977 1

YK001 - YK007 1

YK101 - YK104 1

YK111 - YK112 1

YK121 - YK122 1

YK131 - YK133 1

YK136 - YK139 1

YK141 - YK142 1

YK146 - YK148 1

YK151 - YK154 1

YK161 - YK167 1

YK171 1

YK176 - YK177 1

YK186 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YK191 1

YK196 1

YK201 - YK202 1

YK301 - YK314 1

YK321 - YK340 1

YK361 - YK378 1

YK401 - YK406 1

YK426 - YK427 1

YK431 - YK450 1

YK456 - YK467 1

YK471 - YK473 1

YK476 1

YK480 - YK487 1

YK491 - YK492 1

YK495 - YK499 1

YK511 - YK516 1

YK521 - YK530 1

YK551 - YK571 1

YK576 - YK577 1

YK580 - YK585 1

YK601 - YK602 1

YK606 - YK607 1

YK611 - YK616 1

YK621 - YK634 1

YK641 - YK644 1

YK651 - YK665 1

YK671 - YK672 1

YK676 - YK677 1

YK681 - YK686 1

YK691 1

YK695 1

YK701 - YK713 1

YK716 - YK719 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YK721 - YK741 1

YK751 - YK770 1

YK776 - YK778 1

YK781 - YK785 1

YK791 - YK792 1

YK796 - YK797 1

YK801 - YK899 1

YK901 - YK912 1

YK918 - YK919 1

YK921 - YK929 1

YK941 - YK998 1

YL001 - YL005 1

YL011 - YL016 1

YL021 - YL024 1

YL051 - YL052 1

YL056 - YL057 1

YL061 1

YL066 - YL069 1

YL076 - YL077 1

YL101 - YL137 1

YL201 - YL233 1

YL241 - YL242 1

YL271 - YL272 1

YL281 - YL284 1

YL301 - YL303 1

YL311 - YL314 1

YL316 - YL321 1

YL351 - YL353 1

YL371 - YL374 1

YL401 1

YL421 - YL429 1

YL431 - YL444 1

YL461 - YL478 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YL501 - YL509 1

YL531 - YL534 1

YL541 - YL551 1

YL561 - YL579 1

YL591 - YL598 1

YL601 - YL606 1

YL611 - YL612 1

YL616 - YL617 1

YL621 1

YL626 1

YL631 - YL634 1

YL636 - YL637 1

YL661 - YL664 1

YL676 - YL691 1

YL696 - YL697 1

YL701 - YL707 1

YL731 1

YL751 - YL752 1

YL756 - YL757 1

YL761 - YL780 1

YL796 - YL797 1

YL801 - YL815 1

YL901 - YL910 1

YL921 - YL940 1

YL951 - YL968 1

YM101 - YM103 1

YM201 - YM244 1

YM251 - YM299 1

YM301 - YM399 1

YM401 - YM415 1

YM471 1

YM481 - YM484 1

YM501 - YM515 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YM521 - YM522 1

YM541 1

YM551 - YM553 1

YM571 - YM572 1

YM581 - YM582 1

YM591 - YM599 1

YM631 - YM634 1

YM641 - YM652 1

YM671 - YM674 1

YM691 - YM699 1

YM701 - YM710 1

YM761 - YM765 1

YM771 - YM779 1

YN001 - YN016 1

YN021 - YN024 1

YN061 1

YN071 - YN082 1

YN091 - YN092 1

YN101 - YN112 1

YN121 1

YN201 - YN202 1

YN211 - YN219 1

YN231 - YN236 1

YN261 1

YN501 1

YN531 - YN534 1

YN551 - YN552 1

YN601 - YN604 1

YN701 - YN702 1

YQ001 - YQ003 1

YQ011 - YQ019 1

YQ026 - YQ029 1

YQ036 - YQ045 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YQ201 - YQ202 1

YQ231 1

YQ241 - YQ251 1

YQ281 - YQ284 1

YQ291 - YQ296 1

YQ301 - YQ302 1

YQ401 - YQ403 1

YQ451 - YQ454 1

YQ461 1

YQ471 1

YQ501 1

YR001 - YR016 1

YR051 - YR058 1

YR091 - YR092 1

YR101 - YR102 1

YR111 - YR117 1

YR126 - YR143 1

YR166 - YR175 1

YR201 - YR204 1

YR231 - YR252 1

YR271 - YR283 1

YR286 - YR287 1

YR291 - YR294 1

YR296 - YR297 1

YR301 - YR314 1

YR361 - YR366 1

YR381 - YR382 1

YR401 - YR405 1

YR411 - YR412 1

YR421 - YR422 1

YR431 - YR432 1

YR441 - YR445 1

YR451 - YR455 1

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
Variable Number Group

YR457 - YR458 1

YR501 - YR506 1

YR511 - YR514 1

YR516 - YR520 1

YR526 - YR527 1

YR531 - YR532 1

YR536 - YR537 1

YR601 - YR605 1

YR616 - YR618 1

YR651 - YR658 1

YR701 - YR725 1

YR801 - YR810 1

YR831 - YR834 1

YR851 - YR859 1

YR901 - YR902 1

YR931 - YR932 1

YR941 - YR942 1

YR951 - YR953 1

YR981 - YR988 1

YS001 - YS002 1

YS031 - YS032 1

YS051 - YS057 1

YS101 - YS104 1

YS151 - YS155 1

YS221 1

YS301 - YS302 1

YS601 - YS608 1

YS686 1

YS701 - YS702 1

YS721 1

2. Spares Affected

None.

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
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 2274-COL-AC1-07 (P6.0), new software must be installed. If this change is not done,

an erroneous but valid Radio Altimeter (RA) signal can cause the airplane to go into the Flare Retard

mode at the incorrect time.

In the event of a Low Range Radio Altimeter (LRRA) failure, the new software will disable the Autothrottle

Flare Retard mode during manually controlled landings. This will happen if a difference between the

RA signals of more than 20 feet continues for more than two seconds on approach. The software is

also changed such that the Flare Retard mode will change to ARM mode if the throttles are manually

advanced while in this mode. Landings with the Autopilot engaged are unchanged and the Autothrottle

Flare Retard mode will operate normally.

Additional changes are also made to the interface between the Autothrottle and the Autothrottle Servo

Motors and to reduce the incidence of nuisance No Fault Found.

Boeing Service Related Problem (SRP) 737NG-SRP-22-0032 is related to this service bulletin.

Boeing Fleet Team Digest (FTD) 737NG FTD 34-09008 is related to this service bulletin.

D. Description

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 2274-COL-AC1-07, install new software.

The work in this service bulletin is done in the maintenance zone(s) given below.

Affected Maintenance Zones

Model Zone

737-600, 737-700, 737-700C, 212

737-800, 737-900, 737-900ER

E. Compliance

Boeing recommends that the change given in this service bulletin be done within 12 months 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.

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BOEING SERVICE BULLETIN 737-22A1224

ALERT ALERT
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.

Task Number of Persons Task Hours Elapsed Hours

Software Inspection 1 0.50 0.50

Install Software (a) 1 0.50 0.50

TOTAL FOR EACH AIRPLANE 1.00 1.00

(a) Only necessary if P6.0 software is not installed.

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 38275-175S

b. Boeing Service Related Problem (SRP) 737NG-SRP-22-0032

c. Service Bulletin Index D6-19567

d. 737-600/700/800/900 Aircraft Maintenance Manual (AMM) 20-15-11, 22-11-33

e. 737NG Fleet Team Digest (FTD) 34-09008

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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:

Publication Chapter-Section

737 Illustrated Parts Catalog 22-11

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

Refer to Paragraph 2.C., Parts Necessary for Each Airplane, for interchangeability and intermixability

information.

M. Software Accomplishment Summary

1. The integrated autothrottle function in the Flight Control Computer (FCC) is affected by this change:

The Collins FCC can be retrofit to aircraft delivered with a separate Smith's Autothrottle Computer.

This change would have no effect on those aircraft where the integrated autothrottle function is

not being used.

2. Software changes which affect operational procedures: None.

3. Other software improvements: The change reduces the chances of inappropriate autothrottle

landing RETARD mode engagement due to multiple valid erroneous signals from the LRRA's and

ensures that the autothrottle will exit the landing RETARD mode if the crew manually advances

the thrust levers.

More data about this change is in 737NG FTD 34-09008.

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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 Rockwell Collins Aerospace &

Electronics Inc. as shown in Paragraph 2.C., Parts Necessary for Each Airplane.

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

Media Set Part Num- Media Set Name Software Part Number Software Name Notes

ber

(a) (b) (c)

(d) (e)

831-5854-160 FCC OPS DISK SET 2274-COL-AC1-07 FCC OPS

(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) The existing media set part number is 831-5854-111 or 831-5854-120 or 831-5854-130 or 831-5854-140

831-5854-150.

(d) Only one media set is necessary for each operator.

(e) The media set must 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, Iowa 52498

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.

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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. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for

definition of the acronyms.

2. Obey all of the warnings and cautions given in the specified manual sections.

3. 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.

4. 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 part number

2274-COL-AC1-07. Refer to 737-600/700/800/900 AMM 22-11-33 as an accepted procedure.

Table 1

Reference Version NumberDiskette Set - Rockwell

Collins Part Number

Diskette Set - Boeing

Part Number

Operation Program Software Part Number

2271-COL-AC1-02 S241A100-502 831-5854-111 P1.1

2270-COL-AC1-03 S241A100-503 831-5854-120 P2.0

2277-COL-AC1-04 S241A100-504 831-5854-130 P3.0

2276-COL-AC1-05 S241A100-505 831-5854-140 P4.0

2275-COL-AC1-06 S241A100-506 831-5854-150 P5.0

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 NumberDiskette Set - Rockwell

Collins Part Number

Diskette Set - Boeing

Part Number

Operation Program Software Part Number

2274-COL-AC1-07 S241A100-507 831-5854-160 P6.0

3. Put the airplane back to a serviceable condition.

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