### Commercial **Airplanes** 

# 757 Service Bulletin **SPECIAL ATTENTION Number: 757-25-0298**  Original Issue: October 16, 2008 Revision 1: April 12, 2011 ATA System: 2565 **SUBJECT:** EQUIPMENT / FURNISHINGS - Emergency Equipment - Off-Wing Escape System - Change Escape Slide Compartment Door Latch Fittings and Maintenance Access Door Witness Mark Placards 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## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2008 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 1 of 42 2.0BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 2 of 42 **BOEING SERVICE BULLETIN 757-25-0298**

BLANK PAGE**Table of Contents** Revision Transmittal Sheet............................................ 5 Summary...................................................... 7 1. PLANNING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 J. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1. Existing Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2. Data supplied with this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3. Installation Drawings Used in the Preparation of this Service Bulletin. . . . . . . . . . . . 16 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 C. Parts Necessary For Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 18 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 18 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 FIGURE 1: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS MARK PLACARD CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 FIGURE 2: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL. . . . 25 FIGURE 3: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT DOOR - CHANGE THE DOOR LATCH FITTINGS. . . . . . . . . . . . 27 FIGURE 4: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION . 30 FIGURE 5: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS MARK PLACARD CHANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 FIGURE 6: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL . . . 35 FIGURE 7: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT DOOR - CHANGE THE DOOR LATCH FITTINGS. . . . . . . . . . . . 37 FIGURE 8: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION . 40

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 3 of 42 **BOEING SERVICE BULLETIN 757-25-0298**APPENDIX A: ADJUST DOOR LATCH FITTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 4 of 42 **BOEING SERVICE BULLETIN 757-25-0298**

### Commercial **Airplanes** 

# 757 Service Bulletin **SPECIAL ATTENTION Revision Transmittal Sheet**  **Number: 757-25-0298** Original Issue: October 16, 2008 Revision 1: April 12, 2011 ATA System: 2565 **SUBJECT:** EQUIPMENT / FURNISHINGS - Emergency Equipment - Off-Wing Escape System - Change Escape Slide Compartment Door Latch Fittings and Maintenance Access Door Witness Mark Placards This revision includes all pages of the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplanes changed in accordance with the original issue of this service bulletin. **REASON FOR REVISION** This revision is sent to clarify the door latch engagement information of APPENDIX A. The data given in Information Notice 757-25-0298 IN 01 and IN 02 is included in this revision. Terminology has been changed in the Work Instructions to agree with the terminology defined in Paragraph 3.A., General Information - Notes. These sections were changed: 1. Summary pages., ACTION, revised paragraph. 2. Paragraph 1.D., Description, revised paragraph. 3. Paragraph 1.K.1., Publications, removed Component Maintenance Manual data. 4. Paragraph 1.K.2., Damage Tolerance Based Structural Inspections, added data. 5. Paragraph 2.A., Material - Price and Availability, changed data and format is updated. 6. Paragraph 2.C., Parts Necessary For Each Airplane, added Existing Part Numbers. 7. Paragraph 3.A., GENERAL INFORMATION - NOTE, changed data. 8. Paragraph 3. B., WORK INSTRUCTIONS, step 3 and step 4, changed steps and the sequence of the Figures. 9. FIGURE 1, changed Sheet 1 and Sheet 2, added data to note (a).

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 5 of 4210. FIGURE 5, changed Sheet 1 and Sheet 2, added data to note (a). 11. FIGURE 7, added data to steps table. 12. APPENDIX A, changed data. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes. Pages with no vertical lines have no important changes. **REVISION HISTORY** October 16, 2008 Original Issue: April 12, 2011 Revision 1:

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 6 of 42 **BOEING SERVICE BULLETIN 757-25-0298**

### Commercial **Airplanes** 

# 757 Service Bulletin **SPECIAL ATTENTION Summary**  **Number: 757-25-0298** Original Issue: October 16, 2008 Revision 1: April 12, 2011 ATA System: 2565 **SUBJECT:** EQUIPMENT / FURNISHINGS - Emergency Equipment - Off-Wing Escape System - Change Escape Slide Compartment Door Latch Fittings and Maintenance Access Door Witness Mark Placards BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **CONCURRENT REQUIREMENTS** Refer to Paragraph 1.B., Concurrent Requirements **BACKGROUND** This service bulletin gives instructions to change the latch fittings to provide positive locking of the off-wing escape slide compartment door and change the witness mark placards on the door frame of the maintenance access door. If the change given in this service bulletin is not done, unavailability of escape slide during a critical-time emergency evacuation could lead passengers to a serious or fatal injury. Since May 2005, four operators have reported seven events of off-wing escape slide EICAS messages with in-flight loss of the off-wing escape slide. The off-wing escape slides did not inflate however the carrier rotated onto the wing which resulted in the loss of the escape slide. Boeing Service Related Problem (SRP) 757-SRP-25-0265 is related to this service bulletin. Boeing Fleet Team Digest article number 757-FTD-25-07001 discussed this issue, providing interim action. **ACTION (PRR 54530-283RS)** Disarm the off-wing escape slide system. Open the off-wing escape slide maintenance access door. Open the off-wing escape slide compartment door. Remove and install witness mark placards on the door frame of the off-wing escape slide maintenance access door. Remove the access door from the container shroud in the main landing gear wheel well. Remove and install the off-wing escape slide compartment door latch fittings forward and aft. Close the off-wing escape slide compartment door. Close the off-wing escape slide maintenance access door. Install the access door in the container shroud in the main landing gear wheel well. Arm the off-wing escape slide system. **EFFECTIVITY** 757-200, -200CB and -300 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 7 of 42**COMPLIANCE** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the change given in this service bulletin be done within 60 months, after the original issue date of this service bulletin. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are not available for the configuration changes or repair procedures given in this service bulletin. **MANPOWER Elapsed Hours**  **Total Task Hours Airplanes**  3.50 7.00 Each Airplane
**MATERIAL INFORMATION** Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 8 of 42 **BOEING SERVICE BULLETIN 757-25-0298**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 9 of 42 **BOEING SERVICE BULLETIN 757-25-0298**BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 10 of 42 **BOEING SERVICE BULLETIN 757-25-0298**

BLANK PAGE

### Commercial **Airplanes** 

# 757 Service Bulletin **SPECIAL ATTENTION Number: 757-25-0298**  Original Issue: October 16, 2008 Revision 1: April 12, 2011 ATA System: 2565 **SUBJECT:** EQUIPMENT / FURNISHINGS - Emergency Equipment - Off-Wing Escape System - Change Escape Slide Compartment Door Latch Fittings and Maintenance Access Door Witness Mark Placards BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS SERVICE BULLETIN IMMEDIATELY. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index Document D624N001 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 5430-283RS for data about this change.

**DESCRIPTION CONFIGURATION**  **GROUP** 757-200, -200CB and -300 Airplanes with off-wing escape slide systems. - 1

Airplane Models: 757-200, 757-200CB, 757-300 **Group Variable Number**  1 NA501 - NA586 1 NB001 - NB004 1 ND001 - ND007 1 ND011 - ND059 1 ND111 - ND113

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 11 of 42**Group Variable Number**  1 ND161 - ND199 1 ND201 - ND203 1 ND221 - ND225 1 ND241 - ND248 1 ND301 - ND322 1 ND401 1 ND891 1 ND895 1 NE001 - NE008 1 NE011 - NE088 1 NE091 - NE094 1 NE141 - NE150 1 NE161 - NE177 1 NE201 - NE204 1 NE301 - NE302 1 NE311 - NE325 1 NL001 - NL002 1 NL006 - NL017 1 NL101 - NL109 1 NL141 1 NL601 - NL616 1 NN001 - NN002 1 NN051 - NN052 1 NT701 - NT769 1 NT791 - NT796 1 NT861 - NT862 1 NT881 - NT885 1 NT901 - NT916 1 NT971 - NT985 1 NU031 - NU038 1 NU701 - NU705 1 NU721 - NU728 1 NU731 - NU732

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 12 of 42 **BOEING SERVICE BULLETIN 757-25-0298**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 bulletins listed below must be done before or at the same time as this service bulletin: **Description Service Bulletin**  **Company** EQUIPMENT / FURNISHINGS - Emergency - Off-Wing Escape System - Modification OfThe Door Latch System And The Sensor Installation 757-25-0182 R02 Boeing

EQUIPMENT / FURNISHINGS - Emergency- Off-Wing Escape System - Bumper Assembly And Placards Installation 757-25-0200 R01 Boeing

EQUIPMENT/FURNISHINGS - Emergency- Off-Wing Escape System - Bumper Assembly And Placard Installation 757-25-0219 R00 Boeing

**C. Reason** This service bulletin gives instructions to change the latch fittings to provide positive locking of the off-wing escape slide compartment door and change the witness mark placards on the door frame of the maintenance access door. If the change given in this service bulletin is not done, unavailability of escape slide during a critical-time emergency evacuation could lead passengers to a serious or fatal injury. Since May 2005, four operators have reported seven events of off-wing escape slide EICAS messages with in-flight loss of the off-wing escape slide. The off-wing escape slides did not inflate however the carrier rotated onto the wing which resulted in the loss of the escape slide. Boeing Service Related Problem (SRP) 757-SRP-25-0265 is related to this service bulletin. Revision 1 is sent to clarify the door latch engagement information, clarify kit availability and add existing part numbers. The latest service bulletin format standards are added. **D. Description** Disarm the off-wing escape slide system. Open the off-wing escape slide maintenance access door. Open the off-wing escape slide compartment door. Remove and install witness mark placards on the door frame of the off-wing escape slide maintenance access door. Remove the access door from the container shroud in the main landing gear wheel well. Remove and install the off-wing escape slide compartment door latch fittings forward and aft. Close the off-wing escape slide compartment door. Close the off-wing escape slide maintenance access door. Install the access door in the container shroud in the main landing gear wheel well. Arm the off-wing escape slide system. **NOTE:** Service bulletin 757-25-0188 has similar access requirements as this service bulletin.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 13 of 42 **BOEING SERVICE BULLETIN 757-25-0298**Revision 1 - No more work is necessary on airplanes changed in accordance with the original issue of this service bulletin. The work in this service bulletin is done in the maintenance zone(s) given below.
**Affected Maintenance Zones Zone**  **Model** 195, 196 757-200, 757-200CB, 757-300 **E. Compliance** The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Boeing recommends that the change given in this service bulletin be done within 60 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 service bulletin 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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 14 of 42 **BOEING SERVICE BULLETIN 757-25-0298 Left Side and Right Side - Change Door Latch Fitting and Witness Placard of Off-Wing Escape**  **Slide Compartment Door Elapsed Hours**  **Task Hours Number of Per-**  **sons Task** 
0.10 0.20 2 Open Access 0.30 0.60 2 Figure 1 0.50 1.00 2 Figure 2 0.60 1.20 2 Figure 3 0.25 0.50 2 Figure 4 0.30 0.60 2 Figure 5 0.50 1.00 2 Figure 6 0.60 1.20 2 Figure 7 0.25 0.50 2 Figure 8 0.10 0.20 2 Close Access 3.50 * 7.00 * TOTAL FOR EACH AIRPLANE * Time to incorporate Boeing Service bulletins 757-25-0182, 757-25-0200, and 757-25-0219 is not included. **H. Weight and Balance Changes Change in Moment**  **(Pound-Inches) Change in Weight**  **(Pounds) Airplane**  Negligible PoundInches Negligible Pounds All

**I. Electrical Load Data** Not changed. **J. References** 1. Existing Data a. Engineering Change Memo PRR 54530-283RS b. Service Related Problem (SRP) 757-SRP-25-0265 c. Standard Overhaul Practices Manual (SOPM) 20-30-03, 20-50-05 d. 757 Aircraft Maintenance Manual (AMM) 25-65-00, 25-65-01, 25-65-09 e. Boeing Service Bulletin 757-25-0182 f. Boeing Service Bulletin 757-25-0188

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 15 of 42 **BOEING SERVICE BULLETIN 757-25-0298**g. Boeing Service Bulletin 757-25-0200 h. Boeing Service Bulletin 757-25-0219 i. Boeing Fleet Team Digest 757-FTD-25-07001 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**  11-21, 25-65 757 Maintenance Manual 25-65 757 Illustrated Part Catalog 25-65 Overhaul Manual 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: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 16 of 42 **BOEING SERVICE BULLETIN 757-25-0298 2. MATERIAL INFORMATION**  **A. Material - Price and Availability** Boeing can supply the kits/parts shown in Paragraph 2.C., Parts Necessary for Each Airplane. Operators are encouraged to share schedule requirements with Boeing for incorporation of the service bulletin. The kits/parts are subject to the terms and conditions of the Boeing standard purchase order acknowledgment. Prices are in United States Dollars. Terms: Net 30 days. Reference this service bulletin and submit your purchase order by one of these methods: 1. Order on-line via ATA Spec 2000 or The Boeing PART Page 2. Fax to (206) 662-7145
**Unit Price thru De cember 31, 2008**  **(US Dollars) QTY**  **Date Name**  **Kit/Part Number**

$1,365.00 25 11/06/2008 Top Kit - Door Latch Fitting and Witness Mark Placard 012N8928-121

$1,365.00 25 11/13/2008 Top Kit - Door Latch Fitting and Witness Mark Placard 012N8928-121

**B. Industry Support Information** Boeing warranty remedies are not available for the configuration changes or repair procedures given in this service bulletin. **C. Parts Necessary For Each Airplane** 1. Kits/Parts To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability. **NOTE:** One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each airplane. **Top Kit Number 012N8928-121 Notes**  **Existing Part Number Name**  **QTY New Part Number**  (a), (b) 416N2623-71 or 416N2623-72 Door Latch Fitting 2 416N2623-75 (a), (b) 416N2623-71 or 416N2623-73 Door Latch Fitting 2 416N2623-76 (a), (b), (c) BAC29PPS37740 Witness Mark Placard 2 BAC27NBY103 (a), (b), (d) BAC29PPS37741 Witness Mark Placard 2 BAC27NBY104

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 17 of 42 **BOEING SERVICE BULLETIN 757-25-0298 Top Kit Number 012N8928-121**  **Notes Existing Part Number**  **Name QTY**  **New Part Number** (a) You cannot use the existing part to replace the new or changed part. (b) Discard the existing part. (c) New part number BAC27NBY103 quantity is 2 and existing part number BAC29PPS37740 quantity is 1. (d) New part number BAC27NBY104 quantity is 2 and existing part number BAC29PPS37741 quantity is 1.2. Parts and Materials Supplied by the Operator
**Notes Name**  **QTY Part Number / Specification**  (a) Solvent 16 oz. BMS 11-7, Type 1 or Type 2 (a) Polyester 4 oz. BMS 10-26, Type 7, Grade A (a) See the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data.

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. **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.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 18 of 42 **BOEING SERVICE BULLETIN 757-25-0298 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 and the Figures 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. Unless shown differently, these dimensions and tolerances are used: – Torque limits to tighten nuts and bolts are in SRM Chapter 51 5. Use the approved fastener and process material substitutions in accordance with SRM Chapter 51. 6. 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. **B. WORK INSTRUCTIONS** 1. Disarm the off-wing escape slide system. Refer to 757 AMM 25-65-00 as an accepted procedure. 2. Open these circuit breakers and attach DO-NOT-CLOSE identifiers:
LOCATION CIRCUIT BREAKER PANEL P6 C004 C4435 EVAC SIGNAL * C005 C4343 EMER ESCAPE - L C006 C4344 EMER ESCAPE - R * If installed. LOCATION CIRCUIT BREAKER PANEL P11 C001 C4320 EMER ESCAPE TEST

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 19 of 42 **BOEING SERVICE BULLETIN 757-25-0298**R033 C4144 DOOR IND
**WARNING:** DO NOT WORK NEAR THE SLIDE COMPARTMENT DOOR UNTIL THE SYSTEM IS FULLY DISARMED ELECTRICALLY AND MECHANICALLY. IF THE ESCAPE SLIDE ACCIDENTALLY INFLATES, INJURY OR DAMAGE CAN OCCUR. 3. Left side - Off -Wing escape slide system. a. Open the off-wing escape slide maintenance access door. Refer to 757 AMM 25-65-00 as an accepted procedure. b. Open the off-wing escape slide compartment door. Refer to 757 AMM 25-65-09 as an accepted procedure. c. Change the off-wing escape slide system witness mark placards in accordance with Figure 1. d. Remove the access door from the container shroud in accordance with Figure 2. e. Change the off-wing escape slide door latch fittings in accordance with Figure 3. f. Close the off-wing escape slide compartment door. Refer to 757 AMM 25-65-09 as an accepted procedure. g. Close the off-wing escape slide maintenance access door. Refer to 757 AMM 25-65-00 as an accepted procedure. h. Install the access door in the container shroud in accordance with Figure 4. 4. Right side - Off -Wing escape slide system. a. Open the off-wing escape slide maintenance access door. Refer to 757 AMM 25-65-00 as an accepted procedure. b. Open the off-wing escape slide compartment door. Refer to 757 AMM 25-65-09 as an accepted procedure. c. Change the off-wing escape slide system witness mark placards in accordance with Figure 5. d. Remove the access door from the container shroud in accordance with Figure 6. e. Change the off-wing escape slide door latch fittings in accordance with Figure 7. f. Close the off-wing escape slide compartment door. Refer to 757 AMM 25-65-09 as an accepted procedure. g. Close the off-wing escape slide maintenance access door. Refer to 757 AMM 25-65-00 as an accepted procedure. h. Install the access door in the container shroud in accordance with Figure 8.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 20 of 42 **BOEING SERVICE BULLETIN 757-25-0298**5. Close these circuit breakers, and remove DO-NOT-CLOSE identifiers:
LOCATION CIRCUIT BREAKER PANEL P6 C004 C4435 EVAC SIGNAL * C005 C4343 EMER ESCAPE - L C006 C4344 EMER ESCAPE - R * If installed. LOCATION CIRCUIT BREAKER PANEL P11 C001 C4320 EMER ESCAPE TEST R033 C4144 DOOR IND 6. Arm the off-wing escape slide system. Refer to 757 AMM 25-65-00 as an accepted procedure. 7. Put the airplane back to a serviceable condition.

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1: April 12, 2011 21 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 1: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS**  **MARK PLACARD CHANGE (SHEET 1 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 22 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 1: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS**  **MARK PLACARD CHANGE (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 23 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to SOPM 20-50-05 as an accepted procedure. 1 BAC29PPS37740 Witness Mark Plac- ard Remove 1
Refer to SOPM 20-30-03 as an accepted procedure. 16 oz. BMS 11-7, Type 1 or Type 2 Surfaces Clean 2 (a). Refer to SOPM 20-50-05 as an accepted procedure. 2 BAC27NBY103 Witness Mark Plac- ard Install (new) 3
Refer to SOPM 20-50-05 as an accepted procedure. 4 oz. BMS 10-26, Type 7, Grade A Continuous Edge Seal Apply 4
Refer to SOPM 20-50-05 as an accepted procedure. 4 oz. BMS 10-26, Type 7, Grade A Clear Overcoat Apply 5 (a) Placards aligned with inner edge of the door frame of the maintenance access door. Yellow band on placard aligned with actuator crank handle in the fully down and locked position. Actuator crank handle is in the fully down and locked position when door latch tube pin is fully forward in the forward structural fitting.

**FIGURE 1: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS MARK PLACARD CHANGE**  **(SHEET 3 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 24 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 2: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL**  **(SHEET 1 OF 2)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 25 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to 757 AMM 25-65-01 as an accepted procedure. 18 BACB30NN3K5 or BACB30NN3K7 Bolt Remove/Keep 1

1 140N0811-3 Access Door

**FIGURE 2: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 26 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 3: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT**  **DOOR - CHANGE THE DOOR LATCH FITTINGS (SHEET 1 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 27 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 3: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT**  **DOOR - CHANGE THE DOOR LATCH FITTINGS (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 28 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  2
- Nut Remove/Keep 1 2
- Washer 1 416N2623-71 Door Latch Fitting Remove Note: If shim is installed. Keep shim in original position. 2
- Nut Remove/Keep 2 2
- Washer 1 416N2623-71 Door Latch Fitting Remove Note: If shim is installed. Keep shim in original position. Refer to SOPM 20-30-03 as an accepted procedure. 16 oz. BMS 11-7, Type 1 or Type 2 Surfaces Clean 3

1 416N2623-75 Door Latch Fitting Install (new) 4 2
- Washer Install (Kept) 2
- Nut Note: If shim is installed, shim to remain in original position. 1 416N2623-76 Door Latch Fitting Install (new) 5 2
- Washer Install (Kept) 2
- Nut Note: If shim is installed, shim to remain in original position. In accordance with Appendix A. 1 416N2623-75 Door Latch Fitting Adjust 6 1 416N2623-76

**FIGURE 3: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT DOOR - CHANGE THE DOOR LATCH FITTINGS**  **(SHEET 3 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 29 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 4: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION**  **(SHEET 1 OF 2)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 30 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to 757 AMM 25-65-01 as an accepted procedure. 1 140N0811-3 Access Door Install (Kept) 1 18 BACB30NN3K5 or BACB30NN3K7 Bolt

**FIGURE 4: LEFT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 31 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 5: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS**  **MARK PLACARD CHANGE (SHEET 1 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 32 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 5: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS**  **MARK PLACARD CHANGE (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 33 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to SOPM 20-50-05 as an accepted procedure. 1 BAC29PPS37741 Witness Mark Plac- ard Remove 1
Surfaces. Refer to SOPM 20-30-03 as an accepted procedure. 16 oz. BMS 11-7, Type 1 or Type 2 Clean 2

(a). Refer to SOPM 20-50-05 as an accepted procedure. 2 BAC27NBY104 Witness Mark Plac- ard Install (new) 3
Refer to SOPM 20-50-05 as an accepted procedure. 4 oz. BMS 10-26, Type 7, Grade A Continuous Edge Seal Apply 4
Refer to SOPM 20-50-05 as an accepted procedure. 4 oz. BMS 10-26, Type 7, Grade A Clear Overcoat Apply 5 (a) Placards aligned with inner edge of the door frame of the maintenance access door. Yellow band on placard aligned with actuator crank handle in the fully down and locked position. Actuator crank handle is in the fully down and locked position when door latch tube pin is fully forward in the forward structural fitting.

**FIGURE 5: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - MAINTENANCE ACCESS DOOR - WITNESS MARK PLACARD CHANGE**  **(SHEET 3 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 34 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 6: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL**  **(SHEET 1 OF 2)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 35 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to 757 AMM 25-65-01 as an accepted procedure. 18 BACB30NN3K5 or BACB30NN3K7 Bolt Remove/Keep 1

1 140N0811-4 Access Door

**FIGURE 6: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - REMOVAL (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 36 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 7: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT**  **DOOR - CHANGE THE DOOR LATCH FITTINGS (SHEET 1 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 37 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 7: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT**  **DOOR - CHANGE THE DOOR LATCH FITTINGS (SHEET 2 OF 3)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 38 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  2
- Nut Remove/Keep 1 2
- Washer 1 416N2623-71 or 416N2623-72 Door Latch Fitting Remove Note: If shim is installed. Keep shim in original position. 2
- Nut Remove/Keep 2 2
- Washer 1 416N2623-71 or 416N2623-73 Door Latch Fitting Remove Note: If shim is installed. Keep shim in original position. Refer to SOPM 20-30-03 as an accepted procedure. 16 oz. BMS 11-7, Type 1 or Type 2 Surfaces Clean 3

1 416N2623-75 Door Latch Fitting Install (new) 4 2
- Washer Install (Kept) 2
- Nut Note: If shim is installed, shim to remain in original position. 1 416N2623-76 Door Latch Fitting Install (new) 5 2
- Washer Install (Kept) 2
- Nut Note: If shim is installed, shim to remain in original position. In accordance with Appendix A. 1 416N2623-75 Door Latch Fitting Adjust 6 1 416N2623-76

**FIGURE 7: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - OFF-WING ESCAPE SLIDE COMPARTMENT DOOR - CHANGE THE DOOR LATCH FITTINGS**  **(SHEET 3 OF 3)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 39 of 42 **BOEING SERVICE BULLETIN 757-25-0298 FIGURE 8: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION**  **(SHEET 1 OF 2)**

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 40 of 42 **BOEING SERVICE BULLETIN 757-25-0298**The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for one side of airplane.
**MORE DATA QTY**  **IDENTIFICATION NAME**  **TASK STEP**  Refer to 757 AMM 25-65-01 as an accepted procedure. 1 140N0811-4 Access Door Install (Kept) 1 18 BACB30NN3K5 or BACB30NN3K7 Bolt

**FIGURE 8: RIGHT SIDE OFF-WING ESCAPE SLIDE SYSTEM - ACCESS DOOR - INSTALLATION (SHEET 2 OF 2)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 41 of 42 **BOEING SERVICE BULLETIN 757-25-0298**1. This is a two person operation. (a) Person 1 - Locate person 1 on wing trailing edge by the off-wing escape slide system to get access to the escape slide compartment door. (b) Person 2 - Locate person 2 at the escape slide maintenance access door and as needed in the main landing gear wheel well at the access door for the escape slide pack. 2. Person 2 - Open maintenance access door and make sure yellow crank handle is in the up and unlocked position. 3. Person 1 - With the escape slide compartment door in the closed position, make sure the exterior side of the door is pressed against the fuselage at the lower forward and aft sides. 4. Person 2 - Make sure the door latch fittings are not engaged with the door latch tube studs. 5. Person 1 - Release pressure on the door and make sure the lower forward and aft side remain ajar. If the door does not remain ajar, have door latch fittings adjusted. Tighten screws. 6. Person 1 - With the escape slide compartment door in the closed position, make sure the exterior side of the door is pressed against the fuselage at the lower forward and aft sides. 7. Person 2 - Open maintenance access door, lift the release trigger and move the yellow crank handle to the fully down and locked position, this will engage the door latch fittings with the door latch tube studs. 8. Person 2 - Move the yellow crank handle to the to the fully up and unlocked position and make sure the escape slide compartment door opens. If the slide compartment door does not open freely, repeat step 5.

**APPENDIX A: ADJUST DOOR LATCH FITTING (SHEET 1 OF 1)** 

BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: October 16, 2008 757-25-0298 Revision 1 April 12, 2011 42 of 42 **BOEING SERVICE BULLETIN 757-25-0298**