### Commercial **Airplanes** 

# 777 Service Bulletin **SPECIAL ATTENTION Number: 777-25-0507**  Original Issue: June 30, 2011 ATA System: 2566 **SUBJECT:** EQUIPMENT/FURNISHINGS - Emergency - Door-Mounted Escape Slide Pack - Change to Escape Slide/Raft to Prevent Corrosion of Packboard Release Mechanism Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 730-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws. 9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2011 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work. This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and the Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 1 of 22 5.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 2 of 22 **BOEING SERVICE BULLETIN 777-25-0507**

BLANK PAGE**Table of Contents** Summary...................................................... 5 1. PLANNING INFORMATION ........................................ 9 A. Effectivity................................................ 9 1. Airplanes............................................. 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1. Existing Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2. Data supplied with this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3. Installation Drawings Used in the Preparation of this Service Bulletin. . . . . . . . . . . . 17 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 C. Parts Necessary For Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 19 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 19 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 3 of 22 **BOEING SERVICE BULLETIN 777-25-0507**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 4 of 22 **BOEING SERVICE BULLETIN 777-25-0507**

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### Commercial **Airplanes** 

# 777 Service Bulletin **SPECIAL ATTENTION Summary**  **Number: 777-25-0507** Original Issue: June 30, 2011 ATA System: 2566 **SUBJECT:** EQUIPMENT/FURNISHINGS - Emergency - Door-Mounted Escape Slide Pack - Change to Escape Slide/Raft to Prevent Corrosion of Packboard Release Mechanism BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **CONCURRENT REQUIREMENTS** The service bulletin(s) listed below must be done before or at the same time as this service bulletin: **Description Service Bulletin**  **Company** Inspect the housing assembly to determine if it is unsealed and replace the assembly with a new assembly if necessary. Air Cruisers Company SB 777-107-25-30, Original IssueAir Cruisers Company

**BACKGROUND** This service bulletin describes modification to door mounted escape slide/rafts. Modification is done in accordance with Air Cruisers Company SB 777-107-25-30 to packboard release mechanism to prevent corrosion. If you do not do this service bulletin, escape slide/rafts may not deploy when required and may prohibit doors from opening in the armed mode. Three 777 operators have reported the detection of corrosion at first overhaul of main deck door mounted escape slide/raft packboard release mechanisms. Two of the operators have reported incidents at the time of first deployment where the escape slide/raft did not release from the door and prevented door opening in the armed mode. The third operator reported evidence of corrosion on 25 out of 270 escape slide/rafts overhauled during the last 3 years. Investigation revealed several packboard release mechanism components exhibited in-service galvanic corrosion. The cause was due to non-isolation of dissimilar metals, use of galvanic corrosion susceptible metals, and finishes that are not effective in protecting from galvanic corrosion. Boeing Service Related Problem (SRP) 777-SRP-25-0293 is related to this service bulletin. This SRP is described in Fleet Team Digest Article 777 FTD 25-10002. **ACTION (PRR 62777-75S)** Airplanes are divided into groups because of difference in number of entry doors or difference in entry door numbers.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 5 of 22**Group 1:** Remove escape slide/rafts at passenger/crew entry doors 1, 2, 3, and 4, left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. **Group 2:** Remove escape slide/rafts at passenger/crew entry doors 1, 2, 4, and 5, left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. **Group 3:** Remove escape slide/rafts at crew entry doors 1 left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. **EFFECTIVITY** Model 777-200, 777-200LR, 777-300, 777-300ER, and 777F airplanes. Refer to Paragraph 1.A., Effectivity for the list of affected airplanes. **COMPLIANCE** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the changes given in this service bulletin be done within 42 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**  8.00 (a) 16.00 (a) Group 1 and 2 (8 escape slide/rafts) 2.00 (a) 4.00 (a) Group 3 (2 escape slide/rafts) (a) Does not include time required to modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30.
**MATERIAL INFORMATION** Refer to Air Cruisers Company SB 777-107-25-30.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 6 of 22 **BOEING SERVICE BULLETIN 777-25-0507**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 7 of 22 **BOEING SERVICE BULLETIN 777-25-0507**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 8 of 22 **BOEING SERVICE BULLETIN 777-25-0507**

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### Commercial **Airplanes** 

# 777 Service Bulletin **SPECIAL ATTENTION Number: 777-25-0507**  Original Issue: June 30, 2011 ATA System: 2566 **SUBJECT:** EQUIPMENT/FURNISHINGS - Emergency - Door-Mounted Escape Slide Pack - Change to Escape Slide/Raft to Prevent Corrosion of Packboard Release Mechanism BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index Document D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This service bulletin is for the airplane(s) shown below. An equivalent change is on subsequent production airplanes. Refer to PRR 62777-75S for data about this change.
**DESCRIPTION CONFIGURATION**  **GROUP** 777-200, 777-200LR Airplanes

- 1 777-300, 777-300ER Airplanes

- 2 777F Airplanes

- 3

Airplane Models: 777-200, 777-200LR, 777-300, 777-300ER, 777F **Group Variable Number**  1 WA001 - WA017 1 WA076 - WA079 1 WA086 - WA093 1 WA101 - WA104 1 WA116 - WA119

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 9 of 22**Group Variable Number**  1 WA131 - WA137 1 WA171 - WA175 1 WA196 - WA198 1 WA206 - WA212 1 WA221 - WA223 1 WA231 - WA232 1 WA241 - WA250 1 WA261 - WA266 1 WA281 - WA283 1 WA301 - WA304 1 WB001 - WB021 1 WB031 - WB046 1 WB051 - WB088 1 WB101 - WB106 1 WB121 - WB125 1 WB131 - WB148 1 WB151 - WB155 1 WB161 - WB177 1 WB181 - WB194 1 WB201 - WB215 1 WB231 - WB247 1 WB271 - WB273 1 WB276 - WB286 1 WB291 - WB302 1 WB306 - WB307 1 WB311 - WB337 1 WB341 - WB342 1 WB366 - WB368 1 WB371 - WB388 1 WB406 1 WB411 - WB413 1 WB416 - WB439 1 WB446 - WB453

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 10 of 22 **BOEING SERVICE BULLETIN 777-25-0507 Group**  **Variable Number** 1 WB476 1 WB481 - WB484 2 WB501 - WB512 2 WB531 - WB537 2 WB551 - WB554 2 WB591 - WB597 2 WB601 - WB606 2 WB611 - WB622 2 WB631 - WB638 2 WB646 - WB649 1 WC051 - WC073 1 WC101 - WC104 1 WC111 - WC120 1 WC221 - WC224 1 WC241 - WC243 1 WC281 - WC290 1 WC301 - WC308 1 WC361 - WC364 1 WC371 - WC374 1 WC381 - WC395 1 WC441 1 WC446 - WC449 1 WC456 - WC459 1 WC486 - WC493 1 WC506 - WC508 1 WC521 - WC522 1 WC531 - WC536 1 WC546 - WC548 1 WC556 1 WC566 - WC567 1 WC571 - WC574 1 WC581 1 WD001 - WD002

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 11 of 22 **BOEING SERVICE BULLETIN 777-25-0507 Group**  **Variable Number** 1 WD011 - WD018 1 WD031 - WD036 1 WD046 - WD055 1 WD066 - WD075 1 WD081 - WD088 1 WD091 1 WD096 1 WD101 - WD103 2 WD501 - WD513 2 WD521 - WD541 2 WD546 - WD554 2 WD561 - WD573 2 WD581 - WD599 2 WD606 - WD609 2 WD621 - WD632 2 WD651 - WD665 2 WD671 - WD676 2 WD691 - WD709 2 WD741 - WD752 2 WD761 - WD771 2 WD786 - WD788 2 WD796 - WD813 2 WD826 - WD837 2 WD846 - WD861 2 WD871 - WD883 2 WD911 - WD915 2 WD921 - WD922 2 WD936 - WD939 2 WD946 - WD951 2 WD966 - WD970 2 WD981 - WD982 2 WD986 - WD987 2 WD996

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 12 of 22 **BOEING SERVICE BULLETIN 777-25-0507 Group**  **Variable Number** 2 WE001 - WE004 2 WE011 - WE012 2 WE021 - WE024 2 WE031 2 WE051 - WE052 2 WE071 2 WE081 - WE082 2 WE126 - WE132 3 WF001 - WF004 3 WF016 - WF020 3 WF031 - WF032 3 WF046 - WF054 3 WF076 - WF077 3 WF081 - WF088 3 WF096 - WF099 3 WF106 - WF107 3 WF111 - WF112 3 WF121 2. Spares Affected Examine 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. **B. Concurrent Requirements** The service bulletin(s) listed below must be done before or at the same time as this service bulletin: **Description Service Bulletin**  **Company** Inspect the housing assembly to determine if it is unsealed and replace the assembly with a new assembly if necessary. Air Cruisers Company SB 777-107-25-30, Original IssueAir Cruisers Company

**C. Reason** This service bulletin describes modification to door mounted escape slide/rafts. Modification is done in accordance with Air Cruisers Company SB 777-107-25-30 to packboard release mechanism to prevent corrosion. If you do not do this service bulletin, escape slide/rafts may not deploy when required and may prohibit doors from opening in the armed mode.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 13 of 22 **BOEING SERVICE BULLETIN 777-25-0507**Three 777 operators have reported the detection of corrosion at first overhaul of main deck door mounted escape slide/raft packboard release mechanisms. Two of the operators have reported incidents at the time of first deployment where the escape slide/raft did not release from the door and prevented door opening in the armed mode. The third operator reported evidence of corrosion on 25 out of 270 escape slide/rafts overhauled during the last 3 years. Investigation revealed several packboard release mechanism components exhibited in-service galvanic corrosion. The cause was due to non-isolation of dissimilar metals, use of galvanic corrosion susceptible metals, and finishes that are not effective in protecting from galvanic corrosion. Boeing Service Related Problem (SRP) 777-SRP-25-0293 is related to this service bulletin. This SRP is described in Fleet Team Digest Article 777 FTD 25-10002. **D. Description** Airplanes are divided into groups because of difference in number of entry doors or difference in entry door numbers. **Group 1:** Remove escape slide/rafts at passenger/crew entry doors 1, 2, 3, and 4, left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. **Group 2:** Remove escape slide/rafts at passenger/crew entry doors 1, 2, 4, and 5, left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. **Group 3:** Remove escape slide/rafts at crew entry doors 1 left and right. Modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30. Reinstall escape slide/rafts. The work in this service bulletin is done in the maintenance zone(s) given below. **Group 1:**
**Affected Maintenance Zones Zone**  **Model** 831, 832, 834, 835, 841, 842, 844, 845 777-200, 777-200LR **Group 2:**
**Affected Maintenance Zones Zone**  **Model** 831, 832, 834, 835, 841, 842, 844, 845 777-300, 777-300ER

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 14 of 22 **BOEING SERVICE BULLETIN 777-25-0507 Group 3:** 
**Affected Maintenance Zones Zone**  **Model** 831, 841 777F **E. Compliance** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the changes given in this service bulletin be done within 42 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. 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. **Group 1-2: Elapsed Hours**  **Task Hours Number of Per-**  **sons Task** 

4.00 8.00 2 Remove 8 escape slide/rafts

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 15 of 22 **BOEING SERVICE BULLETIN 777-25-0507 Group 1-2:**  **Elapsed Hours Task Hours**  **Number of Per- sons**  **Task**

4.00 8.00 2 Reinstall 8 escape slide/rafts 8.00 16.00 TOTAL FOR EACH AIRPLANE (a) (a) Time to modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30 is not included. **Group 3: Elapsed Hours**  **Task Hours Number of Per-**  **sons Task** 

1.00 2.00 2 Remove 2 escape slide/rafts 1.00 2.00 2 Reinstall 2 escape slide/rafts 2.00 4.00 TOTAL FOR EACH AIRPLANE (a) (a) Time to modify escape slide/rafts in accordance with Air Cruisers Company SB 777-107-25-30 is not included. **H. Weight and Balance Changes** None. **I. Electrical Load Data** Not changed. **J. References** 1. Existing Data a. Engineering Change Memo PRR 62777-75S b. 777 Aircraft Maintenance Manual (AMM) 25-66-01 c. 777 Fleet Team Digest (FTD) 25-10002 d. Air Cruisers Company Service Bulletin 777-107-25-30 e. Service Related Problem (SRP) 777-SRP-25-0293 2. Data supplied with this Service Bulletin None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 16 of 22 **BOEING SERVICE BULLETIN 777-25-0507**3. Installation Drawings Used in the Preparation of this Service Bulletin
**Title Drawing Number**  ESCAPE SLIDE/RAFT INSTL 462W1000 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** 1. Publications: **Chapter-Section**

**Publication** 25-66 777 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 17 of 22 **BOEING SERVICE BULLETIN 777-25-0507**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 18 of 22 **BOEING SERVICE BULLETIN 777-25-0507**

BLANK PAGE**2. MATERIAL INFORMATION A. Material - Price and Availability**  Refer to Air Cruisers Company SB 777-107-25-30. **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 Refer to Air Cruisers Company SB 777-107-25-30. 2. Parts and Materials Supplied by the Operator Refer to Air Cruisers Company SB 777-107-25-30. 3. Parts Modified and Reidentified
**Notes New Part Number**  **Name QTY**  **Existing Part Number** (a), (b), (c)

- Escape Slide/Raft

- S462W001-( ) (a) Make the change in accordance with Air Cruisers Company SB 777-107-25-30. (b) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. (c) You can use the existing part to replace the new or changed part. If you use the existing part, you cancel the effect of the change given in this service bulletin.

4. Parts Removed and Not Replaced Refer to Air Cruisers Company SB 777-107-25-30. **D. Parts Necessary to Change Spares** Refer to Air Cruisers Company SB 777-107-25-30. **E. Special Tooling - Price and Availability** None. **F. Special Tooling Necessary to do this Service Bulletin** None.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 19 of 22 **BOEING SERVICE BULLETIN 777-25-0507**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 20 of 22 **BOEING SERVICE BULLETIN 777-25-0507**

BLANK PAGE**3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION**  **CAUTION:** KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE. **NOTE:** 1. The instructions identified in Paragraph 3.B., Work Instructions, give the recommended sequence of steps. The sequence of steps to do this service bulletin can be changed. 2. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 3. Obey all of the warnings and cautions given in the specified manual sections. 4. These work instructions refer to procedures included in other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used. 5. Replacement of all slide/rafts at the same time is not required.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 21 of 22 **BOEING SERVICE BULLETIN 777-25-0507 B. WORK INSTRUCTIONS** 
1. **Group 1:** a. Remove escape slide/rafts at Doors 1, 2, 3, and 4, left and right. Refer to 777 AMM 25-66-01 as an accepted procedure. b. Modify each escape slide/raft by doing a visual inspection of the housing assembly to determine if it is unsealed, and if necessary, replace the housing assembly with a new housing assembly, in accordance with Air Cruisers Company SB 777-107-25-30. c. Install escape slide/rafts modified in accordance with Air Cruisers Company SB 777-107-25-30 at Doors 1, 2, 3, and 4, left and right. Refer to 777 AMM 25-66-01 as an accepted procedure. d. Put the airplane back in a serviceable condition. 2. **Group 2:** a. Remove escape slide/rafts at Doors 1, 2, 4, and 5, left and right. Refer to 777 AMM 25-66-01 as an accepted procedure. b. Modify each escape slide/raft by doing a visual inspection of the housing assembly to determine if it is unsealed, and if necessary, replace the housing assembly with a new housing assembly, in accordance with Air Cruisers Company SB 777-107-25-30. c. Install escape slide/rafts modified in accordance with Air Cruisers Company SB 777-107-25-30 at Doors 1, 2, 4, and 5, left and right. Refer to 777 AMM 25-66-01 as an accepted procedure. d. Put the airplane back in a serviceable condition. 3. **Group 3:** a. Remove escape slide/rafts at Doors 1 Left and Right. Refer to 777 AMM 25-66-01 as an accepted procedure. b. Modify each escape slide/raft by doing a visual inspection of the housing assembly to determine if it is unsealed, and if necessary, replace the housing assembly with a new housing assembly, in accordance with Air Cruisers Company SB 777-107-25-30. c. Install escape slide/rafts modified in accordance with Air Cruisers Company SB 777-107-25-30 at Doors 1 Left and Right. Refer to 777 AMM 25-66-01 as an accepted procedure. d. Put the airplane back in a serviceable condition.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 30, 2011 777-25-0507 22 of 22 **BOEING SERVICE BULLETIN 777-25-0507**