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Commercial

Airplane

Group 737

Service Bulletin

Number: 737-25-1491

Date: April 23, 2007

ATA System: 2566

SUBJECT: EQUIPMENT/FURNISHINGS - Emergency - Door Mounted Escape System - Change 

Evacuation Slide Inflation Valve Regulator

BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET

Copyright © 2007 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Unpublished Work - All Rights Reserved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, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, BOEING BUSINESS JET, DC-8, DC-9, DC-10, MD-10, 

MD-11, MD-80, MD-90, the Boeing logo and the Boeing livery are among the trademarks owned by Boeing or 

its subsidiaries. No intellectual property license (express or implied) is granted in connection with this document 

or otherwise.
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BOEING SERVICE BULLETIN 737-25-1491

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 Table of Contents

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BOEING SERVICE BULLETIN 737-25-1491

Table of Contents

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

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 33

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 33

K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 33

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 35

3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 36

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FIGURE 1: CONCURRENT REQUIREMENT LOGIC DIAGRAM . . . . . . . . . . . . . . . . . . . . 39

FIGURE 2: ESCAPE SLIDE INSPECTION - ALL GROUPS. . . . . . . . . . . . . . . . . . . . . . . 40
 Table of Contents

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BOEING SERVICE BULLETIN 737-25-1491

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Commercial

Airplane

Group 737

Service Bulletin

Number: 737-25-1491 Summary

Date: April 23, 2007

ATA System: 2566

SUBJECT: EQUIPMENT/FURNISHINGS - Emergency - Door Mounted Escape System - Change 

Evacuation Slide Inflation Valve Regulator

CONCURRENT REQUIREMENTS

For the given configuration groups the changes given in this service bulletin cannot be made unless the changes 

given in the service bulletin(s) that follow are made:

Company Service Bulletin Revision Level Description

Goodrich 5A3086/5A3088-

25-302

Original Issue, 

dated November 

13, 1998 through 

Revision 1, dated 

February 19, 2001

Equipment/

FurnishingsEvacuation 

SystemsIncorporate 

Product 

Improvements on 

B737NG Slides.

Goodrich 5A3086/5A3088-

25-336

Original Issue, 

dated June 17, 

2002

Equipment/

FurnishingsEvacuation 

Systems-Replace 

Angled Trigger 

Housing on Slide 

Regulator Valve.

Goodrich 5A3307-25-309 Original Issue, 

dated October 29, 

1999

Equipment/

FurnishingsEvacuation 

Systems-Install 

Trigger Housing 

Cover on 737NG 

Slides.

Goodrich 25-308 Original Issue, 

dated January 21, 

2000

Equipment/

FurnishingsEvacuation 

Systems-Replace 

Rod in Regulator 

Valve on B737NG 

Slides.
 

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BOEING SERVICE BULLETIN 737-25-1491

For airplanes in Group 1, delivered with escape slide assemblies 5A3086-3 (forward) and 5A3088-3 (aft), you 

cannot make the changes given in this service bulletin unless the changes given in Boeing Service Bulletin 737-

25-1404 as required by FAA AD 2001-15-01 have been incorporated on the escape slide latch assembly. 

Additionally, Boeing Service Bulletin 737-25-1475 and Goodrich Service Bulletin 25-308 are incorporated on the 

escape slide assembly prior to or concurrent with this service bulletin. Refer to Section 3, Figure 1 for a logic 

diagram of concurrent requirements for modifying the escape slide assembly.

1. If escape slide assembly 5A3307-1 is installed as spares, then Goodrich Service Bulletin 25-308 is 

incorporated prior to or concurrent with this service bulletin.

2. If escape slide assembly 5A3307-3 is installed as spares and Goodrich Service Bulletin number 5A3307-

25-309, which modified the 5A3307-1 into a 5A3307-3 is stenciled on the girt, then Goodrich Service 

Bulletin 25-308 is incorporated prior to or concurrent with this service bulletin.

Goodrich 25-338 Original Issue, 

dated July 7, 2003 

through Revision 

1, dated March 31, 

2004

Equipment/

FurnishingsEvacuation 

Systems-Modify 

Regulator With 

New Vespel 

Piston Plug and 

Modify 5A3307 

Slide Valise.

Boeing 737-25-1403 Original Issue, 

dated November 

29, 2001

EQUIPMENT/

FURNISHINGS - 

EMergency -DoorMounted Escape 

System - Inflation 

Cylinder Trigger 

Housing Cover 

Installation

Boeing 737-25-1404 Original Issue, 

dated May 25, 

2000 through 

Revision 1, dated 

April 18, 2002

EQUIPMENT/

FURNISHINGS - 

Emergency - 

Door-Mounted 

Escape System - 

Latch Assembly 

Modification

Boeing 737-25-1475 Original Issue, 

dated November 

26, 2002

EQUIPMENT 

AND FURNISHINGS - DoorMounted Escape 

System - Replace 

Trigger Housing 

on Slide Regulator 

Valve 

Company Service Bulletin Revision Level Description
 

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BOEING SERVICE BULLETIN 737-25-1491

3. If escape slide assembly 5A3307-3 in its original manufactured configuration, as delivered from Boeing or 

Goodrich, is installed as spares, there is no prior or concurrent service bulletin incorporation required with 

this service bulletin.

For airplanes in Group 2, delivered with escape slide assembly 5A3307-1, you cannot make the changes given 

in this service bulletin unless the changes given in Boeing Service Bulletins 737-25-1403 and 737-25-1404 are 

incorporated as required by FAA AD 2001-15-01 on the escape slide and latch assemblies. Additionally, 

Goodrich Service Bulletin 25-308, if applicable, is incorporated on the escape slide assembly prior to or 

concurrent with this service bulletin. Refer to Section 3, Figure 1 for a logic diagram of concurrent requirements 

for modifying the escape slide assembly.

1. If escape slide assembly 5A3307-1 has been modified into a 5A3307-3 by incorporation of Goodrich 

Service Bulletin number 5A3307-25-309, which is stenciled on the girt, then the changes given in Goodrich 

Service Bulletin 25-308 are made prior to or concurrent with this service bulletin.

2. If escape slide assembly 5A3307-3 in its original manufactured configuration, as delivered from Boeing or 

Goodrich, is installed as spares, there is no prior or concurrent service bulletin incorporation required with 

this service bulletin.

3. If escape slide assemblies 5A3086-3 (forward) or 5A3088-3 (aft) are installed as spares, then Boeing 

Service Bulletin 737-25-1475 and Goodrich Service Bulletin 25-308 are incorporated prior to or concurrent 

with this service bulletin. 

For airplanes in Group 3, delivered with escape slide assembly 5A3307-3, you cannot make the changes given 

in this service bulletin unless the changes given in Boeing Service Bulletin 737-25-1404, if applicable, as 

required by FAA AD 2001-15-01 have been incorporated on the escape slide latch assembly. Refer to Section 

3, Figure 1 for a logic diagram of concurrent requirements for modifying the escape slide assembly.

1. If the 5A3307-3 escape slide is installed as spares and Goodrich Service Bulletin number 5A3307-25-309 

which modified the 5A3307-1 into a 5A3307-3 is stenciled on the girt, then Goodrich Service Bulletin 25-

308 is incorporated prior to or concurrent with this service bulletin. 

2. If escape slide assemblies 5A3086-3 (forward) or 5A3088-3 (aft) are installed as spares, then Boeing 

Service Bulletin 737-25-1475 and Goodrich Service Bulletin 25-308 are incorporated prior to or concurrent 

with this service bulletin.

BACKGROUND

There are three reports of a Goodrich 5A3307 series escape slide, installed on 737 Next Generation airplanes, 

which did not inflate when deployed. These escape slides did not inflate even after the back-up handle was 

pulled and the firing cable was pulled out of the valve regulator assembly. Two reports occurred during functional 

tests at Boeing prior to delivery. The third report occurred during an operational test on an in-service airplane.

The escape slides did not inflate due to the incorrect installation of a piston rod in the valve regulator assembly 

of the escape slide. This valve regulator assembly is also used on the 5A3086 and 5A3088 series escape slides. 

If the rod is installed upside down, the valve regulator assembly can be charged but the upside down rod will 

prevent the regulator from activating when the firing cable is pulled. 

There have also been several reports of Goodrich 5A3307 series escape slides not inflating automatically when 

deployed, however, these escape slides did inflate after the back-up handle was pulled. Automatic inflation did 

not occur due to trigger housing cover deflecting the inflation cable and not allowing sufficient force to pull the 

inflation cable from the valve.
 

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BOEING SERVICE BULLETIN 737-25-1491

This service bulletin contains instructions which will prevent the incorrect installation of the piston rod in the 

inflation valve regulator assembly. This service bulletin also contains instructions to remove the cover from the 

trigger housing and modify the valise to add a larger pad to the valise to provide the same shielding function as 

the trigger housing cover. This modification ensures that enough force is applied to the inflation cable for 

extraction from the regulator. If the escape slide fails to inflate during deployment, it can result in the exit not 

being usable during an emergency evacuation.

The changes given in this service bulletin cannot be made without prior or concurrent incorporation of FAA AD 

2001-15-01, which calls out Boeing Service Bulletins 737-25-1403 and 737-25-1404. Boeing Service Bulletin 

737-25-1404 modifies the escape slide latch assembly and compartment. Boeing Service Bulletin 737-25-1403 

calls out Goodrich Service Bulletin 5A3307-25-309, which modifies the escape slide. Incorporation of Goodrich 

Service Bulletin 25-338 as called out in this service bulletin is considered an Alternate Means of Compliance 

(AMOC) to the 5A3307-25-309 Goodrich Service Bulletin. Therefore, Goodrich Service Bulletin 25-338 can be 

incorporated in lieu of the 5A3307-25-309 service bulletin and remain in compliance with FAA AD 2001-15-01.

ACTION (PRR 38546)

Remove the compartment-slide assemblies from the Entry and Service Doors, forward and aft. Remove the 

escape slide assemblies from the compartment assemblies. Change the escape slide assemblies as given in 

the Goodrich Service Bulletin 25-338. Install the modified escape slide assemblies in the compartment 

assemblies. Install the compartment-slide assemblies on the Entry and Service Doors, forward and aft.

Group 1 were delivered with escape slide Goodrich part number 5A3086-3 (forward) and 5A3088-3 (aft).

Group 2 were delivered with escape slide Goodrich part number 5A3307-1 (forward and aft).

Group 3 were delivered with escape slide Goodrich part number 5A3307-3 (forward and aft).

EFFECTIVITY

Group 1 Airplanes: 737-600, -700, -800 airplane line numbers 1 thru 227 and YA030-YA133.

Group 2 Airplanes: 737-600, -700, -800 airplane line numbers 228 thru 477 except YA030-YA058.

Group 3 airplanes: 737-600, -700,-700C, -800, -900 airplane line numbers 478 thru 1314 except YA059 thru 

YA131.

NOTE: YA134 thru YA139 incorporated the changes described in PRR 38546 by way of Modification Revision

Memo Number MR 39286-16 prior to delivery, therefore these effectivities are not applicable to this

service bulletin.

COMPLIANCE

Boeing recommends that the change to the escape slide be done within 36 months after the date on this service 

bulletin.

Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2001-15-01 is related to this service bulletin.

INDUSTRY SUPPORT INFORMATION

Boeing warranty remedies are not available for the escape slide changes given in this service bulletin.
 

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BOEING SERVICE BULLETIN 737-25-1491

MANPOWER

Prior and concurrent Goodrich or Boeing Service Bulletin changes, if required, are not included in the total task 

time. 

MATERIAL INFORMATION

Operator Supplied Parts/Materials.

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

Total Task Hours Elapsed Hours

2.25 2.25
 

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BOEING SERVICE BULLETIN 737-25-1491

INSPECT/CHANGE

ESCAPE SLIDE ASSEMBLY

A

FWD

ESCAPE SLIDE INSTALLATION

SEE A

W48849
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Commercial

Airplane

Group 737

Service Bulletin

Number: 737-25-1491

Date: April 23, 2007

ATA System: 2566

SUBJECT: EQUIPMENT/FURNISHINGS - Emergency - Door Mounted Escape System - Change 

Evacuation Slide Inflation Valve Regulator

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. An equivalent change is on subsequent 

production airplanes. Refer to PRR 38546 for data about this change.

NOTE: YA134 thru YA139 incorporated the changes described in PRR 38546 by way of

Modification Revision Memo Number MR 39286-16 prior to delivery, therefore these

effectivities are not applicable to this Service Bulletin.

Airplane models:

737-600 737-700 737-700C 737-800

737-900

IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER

AEJ SERVICES, LLC (AJL)

3 YG037

GROUP CONFIGURATION DESCRIPTION

1 - 737-600, -700, -800 airplane line numbers 1 

thru 227 and YA030-YA133.

2 - 737-600, -700, -800 airplane line numbers 228 

thru 447 except YA030-YA058.

3 - 737-600, -700, -700C, -800, -900 airplane line 

numbers 478 thru 1314 except YA059 thru 

YA131.
 

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BOEING SERVICE BULLETIN 737-25-1491

AEROMEXICO (AMX)

3 YB207

AIR ALGERIE (ALG)

3 YD101–YD107 YE301–YE305

AIR ASTANA (AKZ)

3 YA356–YA357 YC151

AIR BERLIN (BER)

1 YC051–YC057 YC701 YC703 YC705

2 YC058–YC059 YC461

3 YA614–YA615 YB201 YB203 YC060–YC070

YD151–YD157 YD218

AIR CHINA (BEJ)

2 YC943–YC944 YC981–YC982

3 YA681–YA682 YC945–YC951 YC983

AIR CHINA CHONGQING BRANCH (CHO)

2 YC941–YC942

AIR CHINA SOUTHWEST BRANCH (XIN)

3 YC426–YC428 YE201–YE206

AIR EUROPA (ARE)

2 YC761–YC766

3 YC767–YC770 YC907 YD206–YD209

AIR MAURITANIE (MAR)

1 YA302

AIR NATIONAL GUARD (USK)

3 YG044 YG067 YG069

AIR PACIFIC (APC)

1 YA291

2 YC931–YC932

AIR SAHARA (SAQ)

1 YA253–YA254 YA731 YG001

2 YC462 YC901–YC902

3 YA351 YB204–YB205

AIR SENEGAL INTERNATIONAL (SNG)

3 YA683–YA684

AIR SHAMROCK (SHI)

1 YG016

AJET (HCY)

3 YC416–YC417
 

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BOEING SERVICE BULLETIN 737-25-1491

ALASKA AIRLINES (ASA)

2 YA841–YA847

3 YA848–YA860 YD501–YD508

ALOHA AIRLINES (ALO)

2 YA608 YA610 YA732–YA733

3 YA627–YA629

AMERICAN AIRLINES (AAL)

1 YC801–YC804

2 YC805–YC827

3 YC828–YC877

AMIRI FLIGHT (ABD)

2 YG023

3 YD410 YG026

ARAMCO ASSOCIATED COMPANY (RAS)

3 YB151–YB153 YG601–YG602

ASTRAEUS, LTD. (AUA)

3 YA671–YA672

ATA AIRLINES, INC. (AAT)

3 YD301 YD304–YD305 YD308 YD310

YD314–YD315 YD317–YD319 YD321 YD323

AUSTRALIAN WEDGETAIL PROGRAM (ZVI)

3 YG089 YG201

AUSTRIAN (AUL)

1 YC381–YC382

3 YB171–YB172 YC383 YE171–YE172

BANCO SAFRA (BNS)

3 YG040

BEL AIR LIMITED (ULL)

2 YG022

BELAVIA (ITU)

3 YD408

BNJ SALES COMPANY (BNJ)

2 YG031 YG033

BOEING DEMONSTRATOR JET (BCJ)

3 YG035–YG036

BOETTI AIR INC. (BBI)

3 YG068
 

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BOEING SERVICE BULLETIN 737-25-1491

BWIA WEST INDIES AIRWAYS (TTA)

2 YC136

3 YC137–YC141 YJ001

CHARTWELL (CHP)

2 YG017

CHINA AIRLINES (CHI)

1 YC571 YC574–YC578

2 YC579–YC580

3 YC581–YC583 YC589

CHINA EASTERN AIRLINES (CEA)

3 YB206 YB561–YB568

CHINA EASTERN AIRLINES WUHAN (WUH)

3 YD171–YD172

CHINA EASTERN YUNNAN AIRLINES (YUN)

1 YA811–YA812

2 YA813–YA814

CHINA SOUTHERN AIRLINES (GUN)

3 YC027 YC921 YD313 YD316

YD320 YD322 YD324 YD326–YD327

YD329 YJ671–YJ677

CHINA XINJIANG AIRLINES (XIJ)

3 YA255–YA256 YA645 YA656

COLOMBIAN AIR FORCE (CLB)

2 YG028

COMMONWEALTH OF AUSTRALIA (GAU)

3 YG072 YG075

CONTINENTAL AIRLINES (CAL)

1 YA501–YA521 YC321–YC337

2 YA522–YA536 YC338–YC362

3 YC363–YC380 YD601–YD612 YJ501–YJ517

COPA AIRLINES (COP)

2 YA755–YA756 YA961–YA963

3 YA964–YA970

CYPRUS TURKISH AIRLINES (KTHY) (KHT)

2 YD021

3 YC467 YD022

DALLAH AL BARAKA (KAM)

2 YG063
 

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BOEING SERVICE BULLETIN 737-25-1491

DELTA AIR LINES (DAL)

1 YC601–YC606

2 YC607–YC618

3 YC619–YC655 YC681–YC696

DOBRO LIMITED (DOB)

1 YG008

DUBAI AIR WING (DAW)

1 YG007

3 YD402

E & A AVIATION (RSB)

3 YG082

EASYJET (EZY)

3 YB101–YB122

EIE EAGLE (EIE)

3 YD409

EL AL ISRAEL AIRLINES (ELA)

1 YC405 YC591

2 YA881–YA882 YC592–YC593

3 YC147 YD219

EUROCYPRIA AIRLINES (ECY)

3 YC186–YC189

EVA AIR (EVA)

3 YG083

EXCEL AIRWAYS (SBE)

1 YC111–YC112

3 YC113 YC436–YC437 YC903 YC906

FLYGLOBESPAN.COM (FGS)

2 YE107–YE108

FORD AIR SERVICES (FMC)

1 YA542

FUNAIR (FUN)

2 YG027

FUTURA (FUA)

2 YC407 YC451

3 YC463–YC464 YC466 YC727

GAMA AVIATION LTD (GAV)

1 YG010
 

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BOEING SERVICE BULLETIN 737-25-1491

GARUDA INDONESIA (GIA)

3 YJ473 YJ475

GATX FINANCIAL CORPORATION (GAX)

3 YC728

GE CAPITAL CORPORATION (GEF)

3 YD325

GE CORPORATE AIR TRANSPORT (GEB)

1 YG003

2 YG012

GERMANIA (GER)

1 YA231 YA233 YA235–YA240

GLOBAL JET LUXEMBOURG (SIQ)

3 YD404 YG038

GOL AIRLINES (GOT)

1 YA201–YA202 YA232 YA234 YA241–YA242

YA251–YA252 YA321 YA571–YA572 YA602

YA605

2 YA607 YA611–YA612

3 YA211 YA221 YA323 YA646–YA648

YA650 YA657 YB202 YB271

YD256–YD257 YD302–YD303 YD306–YD307 YJ471–YJ472

GOVT OF EQUATORIAL GUINEA (EGR)

3 YG085

HAINAN AIRLINES (HNA)

1 YA603–YA604 YA606 YC126 YC401

YC404

2 YA544 YA546 YC127 YC452

YC971

3 YC409 YC972–YC978 YD042–YD045 YD216

HAMBURG INTERNATIONAL (HAU)

1 YA574–YA576

2 YA577–YA578

3 YB276

HAPAG-LLOYD FLUG (HAP)

1 YC001–YC009

2 YC010–YC013

3 YC014–YC026 YC028–YC030

ICA BERMUDA (IBL)

2 YG062

ILFC (ILF)

2 YA322
 

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BOEING SERVICE BULLETIN 737-25-1491

JET AIRWAYS (JPL)

1 YA751–YA754 YC402–YC403 YC731–YC732

2 YA609 YC733–YC735

3 YA621–YA622 YA734 YB181–YB184 YC736–YC741

YD309 YD311–YD312 YD328 YD330

YD571

JET AVIATION (JTA)

1 YG015

3 YD405

JET AVIATION BUSINESS JET INC (JBJ)

3 YG071

KENYA AIRWAYS (KEN)

3 YA635–YA636 YA641

KLM - ROYAL DUTCH AIRLINES (KLM)

1 YC781

2 YC782–YC784

3 YC785–YC793 YD531–YD534

KOREAN AIR (KAL)

2 YC441

3 YC442–YC448 YD121–YD126 YD541–YD547

LAS VEGAS JET (LVJ)

1 YG002

LIMITED BRAND INC. (LII)

1 YG005

LINEAS AEREAS AZTECA (AZX)

1 YA601

3 YB501–YB502

LOWA CORPORATION (LWA)

3 YD406

MAERSK AIR (MRS)

1 YA204–YA206 YA573

2 YA207

3 YA208–YA210

MALEV HUNGARIAN AIRLINES (HGA)

3 YA371–YA372 YC201

MANDARIN AIRLINES (MDN)

3 YC587–YC588

MGM MIRAGE (MGM)

3 YG042
 

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BOEING SERVICE BULLETIN 737-25-1491

MIAMI AIR (MIB)

3 YC146 YC904–YC905

MID EAST JET (SKL)

1 YG013–YG014

2 YG021

3 YD407

MONGOLIAN AIRLINES MIAT (MNG)

3 YJ476

N720CH, INC. (NCH)

2 YG019

NATIONAL (NJI)

2 YG032

NATIONAL AIR SERVICES (NAR)

3 YD403 YG080 YG086–YG087

NEOS (NEO)

3 YJ002 YJ631–YJ632

NEWS AMERICA INCORPORATED (NWS)

2 YG020

OMAN AIR (OMR)

3 YA366–YA367 YB551 YC171

ORIENT GLOBAL AVIATION (VTU)

1 YG011

PEGASUS AIRLINES (PGS)

1 YC391 YC572–YC573

2 YC406

3 YC392 YC410 YC412 YC414–YC415

YC455 YD025 YD391

PICTON II (UNU)

1 YG006

PRIME AVIATION KZ (PKZ)

3 YG077

PRIVATAIR (PTS)

2 YG018 YG064

QANTAS (QAN)

3 YC878–YC892

REPUBLIC OF CHINA AIR FORCE (CAF)

2 YC396
 

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BOEING SERVICE BULLETIN 737-25-1491

ROYAL AIR MAROC (RAM)

1 YC301–YC302

2 YA831–YA832

3 YA833–YA835 YC303–YC304

ROYAL JET (RJT)

2 YG024–YG025

ROYAL MALAYSIA AIR FORCE (MAF)

2 YG061

RYANAIR (RYR)

1 YC471

2 YC472–YC475

3 YC476–YC499 YJ801–YJ807

SAFAIR (SFA)

3 YD481–YD483

SAMSUNG TECHWIN CO. (SST)

3 YG079

SAS (SAS)

1 YE001 YE003–YE005 YE007 YE009

YE101–YE104

2 YE011 YE016 YE018 YE020

YE105–YE106

3 YD046–YD049 YD052 YD055 YD082

YE051

SAS BRAATHENS (BRT)

1 YA311 YA543 YE002 YE006

YE008 YE010

2 YA545 YA547 YB001–YB004 YE012–YE015

YE017 YE019 YE109

3 YA548–YA552 YB005–YB006 YD041 YD050–YD051

YD053–YD054 YD081 YD083–YD084

SAS INSTITUTE INC. (SJS)

3 YG041

SAUDI OGER (SAO)

3 YD401 YG073

SHANGHAI AIRLINES (SHA)

1 YA272 YA312–YA313

2 YA314

3 YA891–YA892 YC166–YC169 YJ871

SHENZHEN AIRLINES (SHZ)

1 YA721–YA722

3 YA613 YA626 YA686–YA687 YA801–YA803

YA809 YC153–YC154 YC411 YC413
 

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BOEING SERVICE BULLETIN 737-25-1491

SIGAIR (SIG)

2 YG034

SKY AIRLINES (SYC)

3 YC730

SOUTH AFRICAN AIRFORCE (SFF)

3 YG076

SOUTH AFRICAN AIRWAYS (SAA)

3 YC708–YC715 YC720–YC725 YD023–YD024

SOUTHERN AIRCRAFT SERVICES (HUZ)

1 YG009

SOUTHERN CALIFORNIA AVIATION (SCZ)

3 YC729

SOUTHWEST AIRLINES (SWA)

1 YA001–YA099 YA101–YA133 YA271 YA301

YA541

SPICEJET (ROJ)

1 YC704

2 YC707

3 YC465

STERLING AIRLINES A/S (STR)

1 YA203 YC101–YC103 YC751–YC752

3 YC104

SUN COUNTRY AIRLINES (SCA)

1 YC121

3 YC152 YC155–YC156

SUNEXPRESS (SNS)

1 YC702

2 YC706

3 YC453 YD201–YD202 YJ477–YJ480

SWIFLITE AIRCRAFT CORPORATION (OSF)

3 YG078

TAROM - ROMANIAN AIR TRANSPORT (TRM)

3 YB161–YB162

TBN AVIATION AVV (TBE)

2 YG029

THOMSONFLY (BRI)

2 YD001

3 YD002–YD007
 

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TRACINDA CORP. (TRD)

1 YG004

TRANSAVIA AIRLINES (TAV)

1 YC071–YC073

2 YC074–YC076

3 YB521–YB524 YB541 YC077–YC082 YC091–YC094

TRAVEL SERVICE (TSF)

2 YC408

3 YC454 YC459 YD203 YJ474

TUI AIRLINES BELGIUM (TLB)

3 YD217

TUNISAIR (TUN)

2 YE151–YE153 YG030

3 YE154–YE157

TURKISH AIRLINES (THY)

1 YC501–YC506

2 YC507–YC517

3 YC518–YC526

TUTOR-SALIBA CORPORATION (TTS)

3 YG070

TY AIR (YIP)

2 YG066

UNITED STATES NAVY (USN)

3 YG501–YG506

US AIR FORCE (USF)

3 YG074 YG081 YG084 YG088

VIRGIN BLUE AIRLINES (VOZ)

3 YA336–YA345 YA649 YA658–YA659 YA685

YA688–YA691 YC421–YC422 YC922 YD251–YD254

WESTJET (WJI)

3 YB301–YB310 YB601–YB608

XIAMEN AIRLINES (XIA)

1 YA701–YA704

3 YA705–YA709

YEMENIA (YEM)

3 YC176–YC178

YONA (IOP)

3 YG043
 

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BOEING SERVICE BULLETIN 737-25-1491

ZEPHYR LIMITED (PFR)

3 YG039

IDENTIFICATION BY VARIABLE NUMBER

Variable Group

YA001–YA099 1

YA101–YA133 1

YA201–YA206 1

YA207 2

YA208–YA211 3

YA221 3

YA231–YA242 1

YA251–YA254 1

YA255–YA256 3

YA271–YA272 1

YA291 1

YA301–YA302 1

YA311–YA313 1

YA314 2

YA321 1

YA322 2

YA323 3

YA336–YA345 3

YA351 3

YA356–YA357 3

YA366–YA367 3

YA371–YA372 3

YA501–YA521 1

YA522–YA536 2

YA541–YA543 1

YA544–YA547 2

YA548–YA552 3

YA571–YA576 1

YA577–YA578 2

YA601–YA606 1

YA607–YA612 2

YA613–YA615 3

YA621–YA622 3

YA626–YA629 3

YA635–YA636 3
 

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BOEING SERVICE BULLETIN 737-25-1491

YA641 3

YA645–YA650 3

YA656–YA659 3

YA671–YA672 3

YA681–YA691 3

YA701–YA704 1

YA705–YA709 3

YA721–YA722 1

YA731 1

YA732–YA733 2

YA734 3

YA751–YA754 1

YA755–YA756 2

YA801–YA803 3

YA809 3

YA811–YA812 1

YA813–YA814 2

YA831–YA832 2

YA833–YA835 3

YA841–YA847 2

YA848–YA860 3

YA881–YA882 2

YA891–YA892 3

YA961–YA963 2

YA964–YA970 3

YB001–YB004 2

YB005–YB006 3

YB101–YB122 3

YB151–YB153 3

YB161–YB162 3

YB171–YB172 3

YB181–YB184 3

YB201–YB207 3

YB271 3

YB276 3

YB301–YB310 3

YB501–YB502 3

YB521–YB524 3

YB541 3

Variable Group
 

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YB551 3

YB561–YB568 3

YB601–YB608 3

YC001–YC009 1

YC010–YC013 2

YC014–YC030 3

YC051–YC057 1

YC058–YC059 2

YC060–YC070 3

YC071–YC073 1

YC074–YC076 2

YC077–YC082 3

YC091–YC094 3

YC101–YC103 1

YC104 3

YC111–YC112 1

YC113 3

YC121 1

YC126 1

YC127 2

YC136 2

YC137–YC141 3

YC146–YC147 3

YC151–YC156 3

YC166–YC169 3

YC171 3

YC176–YC178 3

YC186–YC189 3

YC201 3

YC301–YC302 1

YC303–YC304 3

YC321–YC337 1

YC338–YC362 2

YC363–YC380 3

YC381–YC382 1

YC383 3

YC391 1

YC392 3

YC396 2

Variable Group
 

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BOEING SERVICE BULLETIN 737-25-1491

YC401–YC405 1

YC406–YC408 2

YC409–YC417 3

YC421–YC422 3

YC426–YC428 3

YC436–YC437 3

YC441 2

YC442–YC448 3

YC451–YC452 2

YC453–YC455 3

YC459 3

YC461–YC462 2

YC463–YC467 3

YC471 1

YC472–YC475 2

YC476–YC499 3

YC501–YC506 1

YC507–YC517 2

YC518–YC526 3

YC571–YC578 1

YC579–YC580 2

YC581–YC583 3

YC587–YC589 3

YC591 1

YC592–YC593 2

YC601–YC606 1

YC607–YC618 2

YC619–YC655 3

YC681–YC696 3

YC701–YC705 1

YC706–YC707 2

YC708–YC715 3

YC720–YC725 3

YC727–YC730 3

YC731–YC732 1

YC733–YC735 2

YC736–YC741 3

YC751–YC752 1

YC761–YC766 2

Variable Group
 

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BOEING SERVICE BULLETIN 737-25-1491

YC767–YC770 3

YC781 1

YC782–YC784 2

YC785–YC793 3

YC801–YC804 1

YC805–YC827 2

YC828–YC892 3

YC901–YC902 2

YC903–YC907 3

YC921–YC922 3

YC931–YC932 2

YC941–YC944 2

YC945–YC951 3

YC971 2

YC972–YC978 3

YC981–YC982 2

YC983 3

YD001 2

YD002–YD007 3

YD021 2

YD022–YD025 3

YD041–YD055 3

YD081–YD084 3

YD101–YD107 3

YD121–YD126 3

YD151–YD157 3

YD171–YD172 3

YD201–YD203 3

YD206–YD209 3

YD216–YD219 3

YD251–YD254 3

YD256–YD257 3

YD301–YD330 3

YD391 3

YD401–YD410 3

YD481–YD483 3

YD501–YD508 3

YD531–YD534 3

YD541–YD547 3

Variable Group
 

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BOEING SERVICE BULLETIN 737-25-1491

2. Spares Affected

Inspect your spares supply for the parts or components identified in Paragraph 2.C., Parts 

Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for 

the recommended use.

YD571 3

YD601–YD612 3

YE001–YE010 1

YE011–YE020 2

YE051 3

YE101–YE104 1

YE105–YE109 2

YE151–YE153 2

YE154–YE157 3

YE171–YE172 3

YE201–YE206 3

YE301–YE305 3

YG001–YG011 1

YG012 2

YG013–YG016 1

YG017–YG025 2

YG026 3

YG027–YG034 2

YG035–YG044 3

YG061–YG064 2

YG066 2

YG067–YG089 3

YG201 3

YG501–YG506 3

YG601–YG602 3

YJ001–YJ002 3

YJ471–YJ480 3

YJ501–YJ517 3

YJ631–YJ632 3

YJ671–YJ677 3

YJ801–YJ807 3

YJ871 3

Variable Group
 

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BOEING SERVICE BULLETIN 737-25-1491

B. Concurrent Requirements

For the given configuration groups the changes given in this service bulletin cannot be made unless 

the changes given in the service bulletin(s) that follow are made:

Company Service Bulletin Revision Level Description

Goodrich 5A3086/5A3088-

25-302

Original Issue, 

dated November 

13, 1998 through 

Revision 1, dated 

February 19, 2001

Equipment/

FurnishingsEvacuation 

SystemsIncorporate 

Product 

Improvements on 

B737NG Slides.

Goodrich 5A3086/5A3088-

25-336

Original Issue, 

dated June 17, 

2002

Equipment/

FurnishingsEvacuation 

Systems-Replace 

Angled Trigger 

Housing on Slide 

Regulator Valve.

Goodrich 5A3307-25-309 Original Issue, 

dated October 29, 

1999

Equipment/

FurnishingsEvacuation 

Systems-Install 

Trigger Housing 

Cover on 737NG 

Slides.

Goodrich 25-308 Original Issue, 

dated January 21, 

2000

Equipment/

FurnishingsEvacuation 

Systems-Replace 

Rod in Regulator 

Valve on B737NG 

Slides.

Goodrich 25-338 Original Issue, 

dated July 7, 2003 

through Revision 

1, dated March 31, 

2004

Equipment/

FurnishingsEvacuation 

Systems-Modify 

Regulator With 

New Vespel 

Piston Plug and 

Modify 5A3307 

Slide Valise.
 

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BOEING SERVICE BULLETIN 737-25-1491

For airplanes in Group 1, delivered with escape slide assemblies 5A3086-3 (forward) and 5A3088-3 

(aft), you cannot make the changes given in this service bulletin unless the changes given in Boeing 

Service Bulletin 737-25-1404 as required by FAA AD 2001-15-01 have been incorporated on the 

escape slide latch assembly. Additionally, Boeing Service Bulletin 737-25-1475 and Goodrich Service 

Bulletin 25-308 are incorporated on the escape slide assembly prior to or concurrent with this service 

bulletin. Refer to Section 3, Figure 1 for a logic diagram of concurrent requirements for modifying the 

escape slide assembly.

1. If escape slide assembly 5A3307-1 is installed as spares, then Goodrich Service Bulletin 25-308 

is incorporated prior to or concurrent with this service bulletin.

2. If escape slide assembly 5A3307-3 is installed as spares and Goodrich Service Bulletin number 

5A3307-25-309, which modified the 5A3307-1 into a 5A3307-3 is stenciled on the girt, then 

Goodrich Service Bulletin 25-308 is incorporated prior to or concurrent with this service bulletin.

3. If escape slide assembly 5A3307-3 in its original manufactured configuration, as delivered from 

Boeing or Goodrich, is installed as spares, there is no prior or concurrent service bulletin 

incorporation required with this service bulletin.

Boeing 737-25-1403 Original Issue, 

dated November 

29, 2001

EQUIPMENT/

FURNISHINGS - 

EMergency -DoorMounted Escape 

System - Inflation 

Cylinder Trigger 

Housing Cover 

Installation

Boeing 737-25-1404 Original Issue, 

dated May 25, 

2000 through 

Revision 1, dated 

April 18, 2002

EQUIPMENT/

FURNISHINGS - 

Emergency - 

Door-Mounted 

Escape System - 

Latch Assembly 

Modification

Boeing 737-25-1475 Original Issue, 

dated November 

26, 2002

EQUIPMENT 

AND FURNISHINGS - DoorMounted Escape 

System - Replace 

Trigger Housing 

on Slide Regulator 

Valve 

Company Service Bulletin Revision Level Description
 

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BOEING SERVICE BULLETIN 737-25-1491

For airplanes in Group 2, delivered with escape slide assembly 5A3307-1, you cannot make the 

changes given in this service bulletin unless the changes given in Boeing Service Bulletins 737-25-

1403 and 737-25-1404 are incorporated as required by FAA AD 2001-15-01 on the escape slide and 

latch assemblies. Additionally, Goodrich Service Bulletin 25-308, if applicable, is incorporated on the 

escape slide assembly prior to or concurrent with this service bulletin. Refer to Section 3, Figure 1 for 

a logic diagram of concurrent requirements for modifying the escape slide assembly.

1. If escape slide assembly 5A3307-1 has been modified into a 5A3307-3 by incorporation of 

Goodrich Service Bulletin number 5A3307-25-309, which is stenciled on the girt, then the 

changes given in Goodrich Service Bulletin 25-308 are made prior to or concurrent with this 

service bulletin.

2. If escape slide assembly 5A3307-3 in its original manufactured configuration, as delivered from 

Boeing or Goodrich, is installed as spares, there is no prior or concurrent service bulletin 

incorporation required with this service bulletin.

3. If escape slide assemblies 5A3086-3 (forward) or 5A3088-3 (aft) are installed as spares, then 

Boeing Service Bulletin 737-25-1475 and Goodrich Service Bulletin 25-308 are incorporated 

prior to or concurrent with this service bulletin. 

For airplanes in Group 3, delivered with escape slide assembly 5A3307-3, you cannot make the 

changes given in this service bulletin unless the changes given in Boeing Service Bulletin 737-25-

1404, if applicable, as required by FAA AD 2001-15-01 have been incorporated on the escape slide 

latch assembly. Refer to Section 3, Figure 1 for a logic diagram of concurrent requirements for 

modifying the escape slide assembly.

1. If the 5A3307-3 escape slide is installed as spares and Goodrich Service Bulletin number 

5A3307-25-309 which modified the 5A3307-1 into a 5A3307-3 is stenciled on the girt, then 

Goodrich Service Bulletin 25-308 is incorporated prior to or concurrent with this service bulletin. 

2. If escape slide assemblies 5A3086-3 (forward) or 5A3088-3 (aft) are installed as spares, then 

Boeing Service Bulletin 737-25-1475 and Goodrich Service Bulletin 25-308 are incorporated 

prior to or concurrent with this service bulletin.

C. Reason

There are three reports of a Goodrich 5A3307 series escape slide, installed on 737 Next Generation 

airplanes, which did not inflate when deployed. These escape slides did not inflate even after the backup handle was pulled and the firing cable was pulled out of the valve regulator assembly. Two reports 

occurred during functional tests at Boeing prior to delivery. The third report occurred during an 

operational test on an in-service airplane.

The escape slides did not inflate due to the incorrect installation of a piston rod in the valve regulator 

assembly of the escape slide. This valve regulator assembly is also used on the 5A3086 and 5A3088 

series escape slides. If the rod is installed upside down, the valve regulator assembly can be charged 

but the upside down rod will prevent the regulator from activating when the firing cable is pulled. 

There have also been several reports of Goodrich 5A3307 series escape slides not inflating 

automatically when deployed, however, these escape slides did inflate after the back-up handle was 

pulled. Automatic inflation did not occur due to trigger housing cover deflecting the inflation cable and 

not allowing sufficient force to pull the inflation cable from the valve.
 

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BOEING SERVICE BULLETIN 737-25-1491

This service bulletin contains instructions which will prevent the incorrect installation of the piston rod 

in the inflation valve regulator assembly. This service bulletin also contains instructions to remove the 

cover from the trigger housing and modify the valise to add a larger pad to the valise to provide the 

same shielding function as the trigger housing cover. This modification ensures that enough force is 

applied to the inflation cable for extraction from the regulator. If the escape slide fails to inflate during 

deployment, it can result in the exit not being usable during an emergency evacuation.

The changes given in this service bulletin cannot be made without prior or concurrent incorporation of 

FAA AD 2001-15-01, which calls out Boeing Service Bulletins 737-25-1403 and 737-25-1404. Boeing 

Service Bulletin 737-25-1404 modifies the escape slide latch assembly and compartment. Boeing 

Service Bulletin 737-25-1403 calls out Goodrich Service Bulletin 5A3307-25-309, which modifies the 

escape slide. Incorporation of Goodrich Service Bulletin 25-338 as called out in this service bulletin is 

considered an Alternate Means of Compliance (AMOC) to the 5A3307-25-309 Goodrich Service 

Bulletin. Therefore, Goodrich Service Bulletin 25-338 can be incorporated in lieu of the 5A3307-25-

309 service bulletin and remain in compliance with FAA AD 2001-15-01.

D. Description

The compartment-slide assemblies are removed from the Entry and Service Doors, forward and aft. 

The escape slide assemblies are removed from the compartment assemblies. The escape slide 

assemblies are changed by the applicable Boeing and/or Goodrich service bulletins. The modified 

escape slide assemblies are installed in the compartment assemblies. The compartment-slide 

assemblies are installed on the Entry and Service Doors, forward and aft.

The airplane effectivity is divided into three groups to reflect different delivered escape slide 

configurations.

Group 1 Airplanes delivered with escape slide assembly 5A3086-3 (forward) and 5A3088-3 (aft).

Group 2 Airplanes delivered with escape slide assembly 5A3307-1 (forward and aft).

Group 3 Airplanes delivered with escape slide assembly 5A3307-3 (forward and aft).

E. Compliance

Boeing recommends that the change to the escape slide be done within 36 months after the date on 

this service bulletin.

Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2001-15-01 is related to 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.
 

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BOEING SERVICE BULLETIN 737-25-1491

NOTE: Joint Airworthiness Requirements (JAR) compliance status may be found in the Service

Bulletin Index, Part 1.

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 examine the work

*The manpower needed to change the valve regulator per Goodrich Service Bulletin 25-308 and

25-338 is not included in the totals above. Refer to Goodrich Service Bulletins 25-308 and 25-338 for 

additional time estimate.

*The manpower needed to change the valve regulator per Boeing Service Bulletin 737-25-1475 is not 

included in the totals above. Refer to Boeing Service Bulletin 737-25-1475 for additional time estimate.

H. Weight and Balance Changes

None.

I. Electrical Load Data

Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 38546.

b. 737-600/700/800/900 Aircraft Maintenance Manual (AMM) 25-66-01.

c. Engineering Change Memo PRR 38546.

d. FAA Airworthiness Directive (AD) 2001-15-01.

e. Goodrich Service Bulletin 25-308, “EQUIPMENT/FURNISHINGS - Evacuation Systems -

Replace Rod In Regular Valve on B737NG Slides” Original Issue, dated January 21, 2000.

Task

Number of 

Persons Task-Hours Elapsed Hours

Remove and Install 

Escape Slides

1 2.0 2.0

Inspect 1 0.25 0.25

* TOTAL FOR EACH AIRPLANE (4 

Doors)

2.25 2.25
 

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f. Goodrich Service Bulletin 25-338, “Modify Regulator With New Vespel Piston Plug and 

Modify 5A3307 Slide Valise” Original Issue, dated July 7, 2003 through Revision 1, dated 

March 31, 2004.

NOTE: The supplier was told to send copies of the service bulletin to each operator.

g. Goodrich Service Bulletin 5A3086/5A3088-25-302, “Equipment Furnishings-Evacuation 

Systems-Incorporate Product Improvements on B737NG Slides” Original Issue, dated 

November 13, 1998 through Revision 1, dated February 19, 2001.

h. Goodrich Service Bulletin 5A3086/5A3088-25-336, “Equipment Furnishings-Evacuation 

Systems-Replace Angled Trigger Housing on Side Regulator Valve” Original Issue, dated 

June 17, 2002.

i. Goodrich Service Bulletin 5A3307-25-309, “Equipment Furnishings-Evacuation SystemsInstall Trigger Housing Cover on B737 NG Slides” Original Issue, October 29, 1999.

j. Boeing Parts Standards Document D-590.

k. Boeing Drawing 65-88700.

2. Data supplied with this Service Bulletin:

None.

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

These drawings were used to prepare this service bulletin. These drawings are not necessary to 

make the specified changes, and are not supplied with this service bulletin. These drawings may 

not be applicable to all airplane configurations or operators.

K. Publications Affected

L. Interchangeability and Intermixability of Parts

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

information.

Drawing Number Title

416A2200 Compartment - Slide Assembly

416A2100 Evacuation Slide - Compartment Instl

10-61323 Evacuation Slide Assembly Door Mounted

Publication Chapter-Section

737 Illustrated Parts Catalog 25-66-00
 

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BOEING SERVICE BULLETIN 737-25-1491

BLANK PAGE
 

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BOEING SERVICE BULLETIN 737-25-1491

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 and Paragraph 2.D., Parts Necessary To Change Spares. Refer to Goodrich Service Bulletin 

25-338.

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:

Refer to Goodrich Service Bulletin 25-338 for information on parts and materials supplied by the 

operator. 
 

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BOEING SERVICE BULLETIN 737-25-1491

3. Parts Modified and Reidentified:

4. Parts Removed and Not Replaced:

None.

D. Parts Necessary to Change Spares

Refer to Goodrich Service Bulletin 25-338 for information on which parts are necessary for each spare 

escape slide. There is no equivalent production configuration.

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.

Existing Part 

Number QTY Name New Part Number Notes

10-61323-1002 

(Boeing) and

5A3086-3 

(Goodrich)

1 Slide, Forward Door, 

Left or Right Side

10-61323-1302 

(Boeing) and

5A3086-301 

(Goodrich)

(a)

10-61323-1003 

(Boeing) and 

 5A3088-3 

(Goodrich)

1 Slide, Aft Door, Left or 

Right Side

10-61323-1303 

(Boeing) and

5A3088-301 

(Goodrich)

(a)

10-61323-2001 

(Boeing) and 

5A3307-1 

(Goodrich)

1 Slide, Fwd/Aft Door, 

Left or Right Side

10-61323-2302 

(Boeing) and 

5A3307-301 

(Goodrich)

(a)

10-61323-2002 

(Boeing) and

 5A3307-3 

(Goodrich)

1 Slide, Fwd/Aft Door, 

Left or Right Side

10-61323-2302 

(Boeing) and

5A3307-301 

(Goodrich)

(a)

(a) Refer to Goodrich Service Bulletin 25-338 for more information on parts modified and 

reidentified.
 

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BOEING SERVICE BULLETIN 737-25-1491

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. Equivalent procedures may be used as an alternative to the specified manual sections.

B. WORK INSTRUCTIONS

1. Remove the compartment/slide assemblies from the Entry and Service Doors, forward and aft. 

737-600/700/800/900 AMM 25-66-01.

2. Remove the escape slide assemblies from the compartment assemblies. 737-600/700/800/900 

AMM 25-66-01.

a. Escape slide 5A3086-3, 5A3307-1, or 5A3307-3 are removed from the compartment 

assemblies on the forward Entry and Service doors.

b. Escape slide 5A3088-3, 5A3307-1, or 5A3307-3 are removed from the compartment 

assemblies on the aft Entry and Service doors.

3. Inspect escape slides to verify prior or concurrent accomplishment of Goodrich and Boeing 

Service Bulletins by checking the part number and service bulletin number stenciled on the 

escape slide girt. Refer to Figure 2.

a. For escape slide assembly with part number 5A3086-3 or 5A3088-3 verify that Goodrich 

Service Bulletin 25-308 and Boeing Service Bulletins 737-25-1475 have been 

accomplished. If escape slide 5A3307-1 is installed as spares, inspect escape slide to verify 

that Goodrich Service Bulletin 25-308 has been accomplished, if applicable. If escape slide 

5A3307-3 with Goodrich Service Bulletin 5A3307-25-309 stenciled on the girt is installed as 

spares, inspect escape slide to verify that Goodrich Service Bulletin 25-308 has been 

accomplished.

b. For escape slide assembly with part number 5A3307-1 verify that Goodrich Service Bulletin 

25-308 has been accomplished. If escape slides 5A3086-3 or 5A3088-3 are installed as 

spares, inspect escape slides to verify that Goodrich Service Bulletin 25-308 and Boeing 

Service Bulletin 737-25-1475 have been accomplished. If escape slide 5A3307-3 with 

Goodrich Service Bulletin 5A3307-25-309 stenciled on the girt is installed as spares, inspect 

escape slide to verify that Goodrich Service Bulletin 25-308 has been accomplished.
 

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c. For escape slide assembly with part number 5A3307-3 verify that Goodrich Service Bulletin 

25-308 has been incorporated, if applicable. If escape slides 5A3086-3 or 5A3088-3 are 

installed as spares, inspect escape slides to verify that Goodrich Service Bulletin 25-308 

and Boeing Service Bulletin 737-25-1475 have been accomplished.

NOTE: Boeing Service Bulletin 737-25-1475 incorporates the changes given in Goodrich

Service Bulletin 5A3086/5A3088-25-336 if Goodrich Service Bulletin 5A3086/

5A3088-25-302 has not been previously incorporated.

4. Do the changes to the slide assembly given in the Goodrich Service Bulletin 25-338 and any 

required prior or concurrent Goodrich or Boeing Service Bulletin changes listed in the Concurrent 

Requirements section of this service bulletin. Refer to Figure 1.

5. Install the changed escape slides in the compartment assemblies. Refer to 737-600/700/800/900 

AMM 25-66-011.

6. Install the compartment/slide assemblies on the Entry and Service Doors, forward and aft. Refer 

to 737-600/700/800/900 AMM 25-66-01.

7. Put the airplane back to a serviceable condition.
 FIGURE 1: CONCURRENT REQUIREMENT LOGIC DIAGRAM

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BOEING SERVICE BULLETIN 737-25-1491

FIGURE 1: CONCURRENT REQUIREMENT LOGIC DIAGRAM

General Note: Boeing Service Bulletin 737-25-1404 is the subject of FAA AD 2001-15-01 and is to be 

incorporated on the applicable Group 1, 2 and 3 airplanes prior to or concurrent with this service bulletin.

(A) Goodrich Service Bulletin 25-338 is an AMOC to the Goodrich Service Bulletin 5A3307-25-309 called out 

in Boeing Service Bulletin 737-25-1403, which is the subject of FAA AD 2001-15-01.

(B) Boeing Service Bulletin 737-25-1475 incorporates the changes given in Goodrich Service Bulletin 5A3086/

5A3088-25-336 if Goodrich Service Bulletin 5A3086/5A3088-25-302 has not been previously incorporated. 

P/N 5A3307-3

EXISTING SLIDE

(AD 2001-15-01)

STENCILED ON GIRT?

INCORPORATED AND

SB 5A3307-25-309

IS GOODRICH

P/N 5A3307-301

RESULTANT SLIDE

P/N 5A3307-1

EXISTING SLIDE

P/N 5A3307-301

RESULTANT SLIDE

GOODRICH SB 25-308

INCORPORATE

NO

YES

OR 5A3088-3

P/N 5A3086-3

EXISTING SLIDE

OR 5A3088-301

P/N 5A3086-301

RESULTANT SLIDE

(B)

5A3086/5A3088-25-302)

OR

5A3086/5A3088-25-336

(GOODRICH SB

SB 737-25-1475

INCORPORATE BOEING

(A)

(GOODRICH SB 25-338)

SB 737-25-1491

INCORPORATE BOEING

(GOODRICH SB 25-338)

SB 737-25-1491

INCORPORATE BOEING

GOODRICH SB 25-308

INCORPORATE

(A)

(GOODRICH SB 25-338)

SB 737-25-1491

INCORPORATE BOEING

GOODRICH SB 25-308

INCORPORATE

D42161

(SHEET 1 OF 1)
 FIGURE 2: ESCAPE SLIDE INSPECTION - ALL GROUPS

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BOEING SERVICE BULLETIN 737-25-1491

FIGURE 2: ESCAPE SLIDE INSPECTION - ALL GROUPS

The step number shown below agrees with the number shown in the circle symbols in the figure. The QTY 

number shown below is the number of escape slide parts necessary for each door.

STEP TASK NAME PART NUMBER QTY NOTES

1 Visually 

Inspect

Goodrich Part 

Number on 

Escape Slide Girt

5A3086-3 

(forward) or

5A3088-3 (aft) or

5A3307-1 or 

5A3307-3

1

ESCAPE SLIDE INSTALLATION

SEE A

A

FWD

1

W48852

(SHEET 1 OF 1)