### 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.9E991 ECCN: 

## 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 Unpublished Work.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, 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 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. BOEING is a trademark of Boeing Management Company.

Original Issue: May 18, 2012 737-22A1224 1 of 24 3.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 2 of 24 **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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 3 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 4 of 24 **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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 5 of 24**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 Elapsed Hours**  **Total Task Hours Airplanes**  1.00 1.00 All

**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: May 18, 2012 737-22A1224 6 of 24 **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.

**DESCRIPTION CONFIGURATION**  **GROUP** 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 **Group Variable Number** 1 YA129 - YA199 1 YA372 - YA377 1 YA630 - YA631 1 YA642 1 YA666 - YA667

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 7 of 24**Group Variable Number** 1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 8 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 9 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 10 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 11 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 12 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 13 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 14 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 15 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 16 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Group**  **Variable Number**1 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 2. Spares Affected None.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 17 of 24 **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 Zone**  **Model** 212 737-600, 737-700, 737-700C, 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 18 of 24 **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. **Elapsed Hours Task Hours**  **Number of Persons Task**  0.50 0.50 1 Software Inspection 0.50 0.50 1 Install Software (a) 1.00 1.00 TOTAL FOR EACH AIRPLANE (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

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 19 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT**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-Section Publication**  22-11 737 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** 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 20 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT 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

**Notes Software Name**  **Software Part Number Media Set Name**  **Media Set Part Num- ber**  (a) (b) (c) (d) (e) FCC OPS 2274-COL-AC1-07 FCC OPS DISK SET 831-5854-160 (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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 21 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT 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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 22 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT 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 Num**  **ber Diskette Set - Rockwell**  **Collins Part Number Diskette Set - Boeing**  **Part Number Operation Program Soft**  **ware Part Number** P1.1 831-5854-111 S241A100-502 2271-COL-AC1-02 P2.0 831-5854-120 S241A100-503 2270-COL-AC1-03 P3.0 831-5854-130 S241A100-504 2277-COL-AC1-04 P4.0 831-5854-140 S241A100-505 2276-COL-AC1-05 P5.0 831-5854-150 S241A100-506 2275-COL-AC1-06 b. If the software part number is listed in Table 2 below, no more work is necessary.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 23 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT Table 2**  **Reference Version Num ber**  **Diskette Set - Rockwell Collins Part Number**  **Diskette Set - Boeing Part Number** **Operation Program Soft ware Part Number**  P6.0 831-5854-160 S241A100-507 2274-COL-AC1-07 3. Put the airplane back to a serviceable condition.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: May 18, 2012 737-22A1224 24 of 24 **BOEING SERVICE BULLETIN 737-22A1224 ALERT**  **ALERT**