### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Number: 777-35A0027**  Original Issue: December 15, 2011 Revision 1: April 19, 2012 ATA System: 3511 **SUBJECT:** OXYGEN - Crew Oxygen System - Low Pressure Oxygen Hose Replacement Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws. 9E991 ECCN: 

## BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2011 Boeing. Unpublished Work. All Rights Reserved. Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, DreamlinerTM, BBJ, DC-8, DC-9, DC-10, KC-10, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8A, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing. BOEING is a trademark of Boeing Management Company.

Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 1 of 48 3.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 2 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

BLANK PAGE**Table of Contents** Revision Transmittal Sheet............................................ 5 Summary...................................................... 7 1. PLANNING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 B. Concurrent Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 C. Reason. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 D. Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 F. Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 G. Manpower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 H. Weight and Balance Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 I. Electrical Load Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 J. References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1. Existing Data:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2. Data Supplied with this Service Bulletin:. . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3. Installation Drawings Used in the Preparation of this Service Bulletin:. . . . . . . . . . . 18 K. Publications Affected. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 L. Interchangeability and Intermixability of Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 19 M. Software Accomplishment Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. MATERIAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 B. Industry Support Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 C. Parts Necessary for Each Airplane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1. Kits/Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2. Parts and Materials Supplied by the Operator. . . . . . . . . . . . . . . . . . . . . . . . 22 3. Parts Modified and Reidentified. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4. Parts Removed and Not Replaced. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 D. Parts Necessary to Change Spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 F. Special Tooling Necessary to do this Service Bulletin. . . . . . . . . . . . . . . . . . . . . . . 23 3. ACCOMPLISHMENT INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 A. GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 B. WORK INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 FIGURE 1: LOW PRESSURE OXYGEN HOSE SLEEVE AND TAPE INSTALLATION. . . . . . . . . 27 FIGURE 2: FIRST OFFICER SIDE CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENTS . 30 FIGURE 3: CAPTAIN OXYGEN STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 FIGURE 4: FIRST OFFICER STOWAGE CLOSET LOW PRESSURE OXYGEN HOSE REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 FIGURE 5: OBSERVERS CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENT. . . . . 40 FIGURE 6: FLIGHT DECK INTERIOR RESTORATION. . . . . . . . . . . . . . . . . . . . . . . . . 43 APPENDIX A: OXYGEN HOSE TO STOWAGE BOX INSTALLATION. . . . . . . . . . . . . . . . . . . 48

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 3 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 4 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

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### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Revision Transmittal Sheet**  **Number: 777-35A0027** Original Issue: December 15, 2011 Revision 1: April 19, 2012 ATA System: 3511 **SUBJECT:** OXYGEN - Crew Oxygen System - Low Pressure Oxygen Hose Replacement This revision includes all pages of the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** No more work is necessary on the airplane(s) changed in accordance with the original issue of this service bulletin. **REASON FOR REVISION** This revision is sent to revise the effected airplanes. This revision removes airplanes that had the intent of this change incorporated in production. These sections were changed: 1. Paragraph 1.A., Effectivity, Removed Airplanes. 2. Summary, Industry Support Information, Updated warranty information. 3. Paragraph 2.A., Material Price and Availability, Updated Price. 4. Paragraph 2.B., Industry Support Information; Updated warranty information. 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** December 15, 2011 Original Issue: April 19, 2012 Revision 1:

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 5 of 48Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 6 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

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### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Summary**  **Number: 777-35A0027** Original Issue: December 15, 2011 Revision 1: April 19, 2012 ATA System: 3511 **SUBJECT:** OXYGEN - Crew Oxygen System - Low Pressure Oxygen Hose Replacement THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. **CONCURRENT REQUIREMENTS** None. **BACKGROUND** The changes provided in this service bulletin will help prevent damage to the low pressure oxygen hoses that may be subjected to electrical current. An electrical current condition in the low pressure oxygen hose can cause the low pressure oxygen hose to melt or burn. This could result in smoke and/or fire in the flight compartment. An operator reported that a fire originated near the first officer's area which caused extensive damage to the flight deck. One scenario of the causes being considered is that an electrical fault or short circuit resulted in electrical heating of the low pressure oxygen hoses in the flight crew oxygen system. This service bulletin will replace low pressure oxygen hoses with non-conductive low pressure oxygen hoses located on the flight deck. The replacement of the low pressure oxygen hoses will prevent electrical current from passing through the low pressure oxygen hose internal anti-collapse spring which can cause the low pressure oxygen hose to melt or burn. Boeing Service Related Problem (SRP) 777-SRP-35-0047 is related to this service bulletin. Boeing Fleet Team Digest (FTD) 777 FTD 35-11003 is related to this service bulletin. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
**Reference Affected**  **Planning Data** Paragraph 1.A.2., Spares Affected Yes Spares Affected Paragraph 1.E., Compliance Yes AD Related Paragraph 1.H., Weight and Balance Changes Yes Weight and Balance Change

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 7 of 48**Reference Affected**  **Planning Data** Paragraph 1.I., Electrical Load Data No Electrical Load Changed Paragraph 1.K., Publications Affected Yes Publications Affected Paragraph 1.K., Publications Affected No Airplane Flight Operations Affected (Flight CrewOperations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/Parts Yes Kits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator Yes Operator Supplied Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin No Special Tooling Required
**ACTION (PRR 62359)** Remove the stowage boxes for the oxygen masks. Remove the First Officer forward console and side console. Replace the existing low pressure oxygen hoses with the new non-conductive low pressure oxygen hoses. Perform a leak test. **EFFECTIVITY** 777-200, -200LR, -300, -300ER, 777F, Airplanes. Refer to Paragraph 1.A.1., Airplanes, 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 change given in this service bulletin be done within 18 months after the original issue date of this service bulletin. Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-279-AD, is related to this service bulletin. **INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are available for 777 airplanes in-warranty as of September 30, 2011. For man-hour reimbursement for airplanes in-warranty as of that date, send a warranty claim to Boeing Warranty & Product Assurance Contracts. The kit for airplanes in-warranty as of that date will be supplied at no-charge. Please also see BPL 6-1151-777-PGM-198, dated January 6, 2011 for additional participation. Copies of this Program Letter are available from Boeing Warranty & Product Assurance Contracts. When placing your no-charge purchase order with Material Management please reference this service bulletin number, the airplane variable number(s) and this Program Letter 6-1151-777-PGM-198 in your purchase order.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 8 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT MANPOWER**  **Elapsed Hours Total Task Hours**  **Airplanes** 11.25 17.75 TOTAL FOREACH AIRPLANE
**MATERIAL INFORMATION** Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 9 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 10 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 777 Service Bulletin **ALERT Number: 777-35A0027**  Original Issue: December 15, 2011 Revision 1: April 19, 2012 ATA System: 3511 **SUBJECT:** OXYGEN - Crew Oxygen System - Low Pressure Oxygen Hose Replacement THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. **1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number, LineNumber, 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 62359 for data about this change.
**DESCRIPTION CONFIGURATION**  **GROUP** All 777 airplanes before L/N 976.

- 1

Airplane Models: 777-200, 777-200LR, 777-300, 777-300ER, 777F **Group Variable Number**  1 WA001 - WA017 1 WA076 - WA080 1 WA086 - WA093 1 WA101 - WA104 1 WA116 - WA119 1 WA131 - WA137

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 11 of 48**Group Variable Number**  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 1 WB476

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 12 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT Group**  **Variable Number** 1 WB481 - WB484 1 WB501 - WB512 1 WB531 - WB537 1 WB551 - WB554 1 WB591 - WB597 1 WB601 - WB606 1 WB611 - WB622 1 WB631 - WB638 1 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 1 WD011 - WD018

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 13 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT Group**  **Variable Number** 1 WD031 - WD036 1 WD046 - WD055 1 WD066 - WD075 1 WD081 - WD089 1 WD091 1 WD096 1 WD101 - WD105 1 WD111 1 WD116 1 WD501 - WD513 1 WD521 - WD541 1 WD546 - WD554 1 WD561 - WD573 1 WD581 - WD599 1 WD606 - WD609 1 WD621 - WD632 1 WD651 - WD665 1 WD671 - WD677 1 WD691 - WD709 1 WD741 - WD752 1 WD761 - WD771 1 WD786 - WD788 1 WD796 - WD819 1 WD826 - WD837 1 WD846 - WD867 1 WD871 - WD886 1 WD911 - WD915 1 WD921 - WD922 1 WD936 - WD939 1 WD946 - WD953 1 WD966 - WD970 1 WD981 - WD982 1 WD986 - WD987

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 14 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT Group**  **Variable Number** 1 WD996 1 WE001 - WE004 1 WE011 - WE012 1 WE021 - WE026 1 WE031 - WE034 1 WE051 - WE054 1 WE071 1 WE081 - WE083 1 WE091 1 WE126 - WE137 1 WE151 - WE153 1 WE176 - WE177 1 WE186 - WE187 1 WE216 - WE217 1 WF001 - WF004 1 WF016 - WF020 1 WF031 - WF033 1 WF046 - WF058 1 WF075 - WF077 1 WF081 - WF088 1 WF096 - WF101 1 WF106 - WF107 1 WF111 - WF113 1 WF121 - WF123 1 WF131 2. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to Paragraph 3.B., Work Instructions for the recommended action.
**Part Number** 57034-81220 57034-81320 57034-91100

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 15 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT B. Concurrent Requirements**  None. **C. Reason** The changes provided in this service bulletin will help prevent damage to the low pressure oxygen hoses that may be subjected to electrical current. An electrical current condition in the low pressure oxygen hose can cause the low pressure oxygen hose to melt or burn. This could result in smoke and/or fire in the flight compartment. An operator reported that a fire originated near the first officer's area which caused extensive damage to the flight deck. One scenario of the causes being considered is that an electrical fault or short circuit resulted in electrical heating of the low pressure oxygen hoses in the flight crew oxygen system. This service bulletin will replace low pressure oxygen hoses with non-conductive low pressure oxygen hoses located on the flight deck. The replacement of the low pressure oxygen hoses will prevent electrical current from passing through the low pressure oxygen hose internal anti-collapse spring which can cause the low pressure oxygen hose to melt or burn. Boeing Service Related Problem (SRP) 777-SRP-35-0047 is related to this service bulletin. Boeing Fleet Team Digest (FTD) 777 FTD 35-11003 is related to this service bulletin. **D. Description** Remove the stowage boxes for the oxygen masks. Remove the First Officer forward console and side console. Replace the existing low pressure oxygen hoses with the new non-conductive low pressure oxygen hoses. Perform a leak test. The work in this service bulletin is done in the maintenance zone(s) given below.
**Affected Maintenance Zones Zone**  **Model** 211, 212 777-200, 777-200LR, 777-300, 777-300ER, 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 change given in this service bulletin be done within 18 months after the original issue date of this service bulletin. Federal Aviation Administration (FAA) Notice of Proposed Rule Making NPRM 2011-NM-279-AD, is related to this service bulletin.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 16 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT 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. **Elapsed Hours Task Hours**  **Number of Persons Task**  0.50 0.50 1 Open Access 0.75 0.75 1 Figure 1 2.25 4.50 2 Figure 2 1.00 1.00 1 Figure 3 1.50 1.50 1 Figure 4 1.00 2.00 2 Figure 5 0.50 0.50 1 Test 3.25 6.50 2 Figure 6 0.50 0.50 1 Close Access 11.25 17.75 TOTAL FOR EACH AIRPLANE **H. Weight and Balance Changes Change in Moment**  **(Pound-Inches) Change in Weight**  **(Pounds) Airplane**  + 48.0 lb-in + 0.2 lb 777-200/-200LR, 777F

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 17 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT Change in Moment**  **(Pound-Inches) Change in Weight**  **(Pounds) Airplane**  + 3.9 lb-in + 0.2 lb 777-300/-300ER
**I. Electrical Load Data** Not changed. **J. References** 1. Existing Data: a. Engineering Change Memo PRR 62359 b. Boeing Program Letter 6-1151-777-PGM-198, dated January 6, 2011 c. Boeing Service Related Problem (SRP) 777-SRP-35-0047 d. Standard Overhaul Practices Manual (SOPM) 20-70-01 e. 777 Aircraft Maintenance Manual (AMM) 25-11-01, 25-15-01, 25-15-03, 25-15-05, 35-00-00, 35-11-18 f. 777 Fleet Team Digest (FTD) 35-11003 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:
**Title Drawing Number**  Tubing Installation Right Side Cab STA 126.5 - 246 208W4100 Tubing Installation Left Side Cab STA 126.5 - 246 208W4101 Tubing Installation Flight Deck Partition STA 246 208W4103 Lining Installation - No. 3 Window 232W1403 Console Installation - Forward 232W1405 Console Installation - Side 232W1406 Lining Installation - Right Side Aft 232W1411 Molding Installation - Aft Lining 232W1414 Console Installation - Observer 232W4302 Stowage Installation - Right Side 232W4305 The table above lists applicable drawings used to prepare this service bulletin. The drawings are not necessary to make the specified changes, and are not supplied with this service bulletin. The drawings may not be applicable to all airplane configurations or operators.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 18 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT K. Publications Affected**  1. Publications: **Chapter-Section**

**Publication** 35-11 777 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. **M. Software Accomplishment Summary** Not affected.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 19 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 20 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

BLANK PAGE**2. MATERIAL INFORMATION A. Material - Price and Availability**  Boeing can supply the kits 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 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 **REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION** 
**Unit Price as of the original issue** **date of this Ser vice Bulletin (US**  **Dollars) ROLT as of the**  **original issue date of this Ser** **vice Bulletin (Cal endar Days)**  **QTY Date**  **Name Kit Number** 

$1066.00 149 1 11/22/2011 Top Kit 005W3527-1 66 1/09/2012 Top Kit 005W3527-1 66 1/16/2012 Top Kit 005W3527-1 66 1/23/2012 Top Kit 005W3527-1 66 1/30/2012 Top Kit 005W3527-1 66 2/06/2012 Top Kit 005W3527-1 66 2/13/2012 Top Kit 005W3527-1 66 2/20/2012 Top Kit 005W3527-1 66 2/27/2012 Top Kit 005W3527-1 66 3/05/2012 Top Kit 005W3527-1 66 3/12/2012 Top Kit 005W3527-1 66 3/19/2012 Top Kit 005W3527-1 63 3/26/2012 Top Kit 005W3527-1 **B. Industry Support Information** Boeing warranty remedies are available for 777 airplanes in-warranty as of September 30, 2011. For man-hour reimbursement for airplanes in-warranty as of that date, send a warranty claim to Boeing Warranty & Product Assurance Contracts. The kit for airplanes in-warranty as of that date will be supplied at no-charge. Please also see BPL 6-1151-777-PGM-198, dated January 6, 2011 for additional participation. Copies of this Program Letter are available from Boeing Warranty & Product Assurance Contracts.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 21 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**When placing your no-charge purchase order with Material Management please reference this service bulletin number, the airplane variable number(s) and this Program Letter 6-1151-777-PGM-198 in your purchase order. **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. The Top Kit is divided into Figure kits for each installation figure shown in the table below. **Figure Kit 5**  **4 3**  **2 1**  **Top Kit** 1 1 1 1 1 005W3527-1
**ALL**
**KIT 005W3527-1**

**Notes Existing Part**  **Number Name**  **Figure**

**New Part Number 5**  **4 3**  **2 1**  **Qty** (a) (b) SLEEVE

. . . . 3 232U8002-723 (a) (b) SLEEVE

. . . . 1 232U8002-731 (a) (c) 57034-81220 HOSE ASSY

. 1 1 1

. 57034-33N040220 (a) (c) 57034-81320 HOSE ASSY 1

. . . . 57034-33N040320 (a) (c) 57034-91100 HOSE ASSY

. . . 1

. 57034-34N040100 (a) This part is used in production. (b) The sleeve is made from BMS 13-52 Type V. This may come in colors of black or white. (c) You cannot use the existing part to replace the new or changed part. 2. Parts and Materials Supplied by the Operator
**Notes Name**  **QTY Part Number**  (a) P29 Tape

- P29 - 1 inch wide, color optional

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 22 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT Notes**  **Name QTY**  **Part Number** (a) XPEDX, 7011 South 118th Street, Kent, WA 98032; Phone: 425-251-5300
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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 23 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 24 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**

BLANK PAGE**3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION**  **CAUTION:** READ AND OBEY THE SAFETY PRECAUTIONARY AND GENERAL INSTRUCTIONS FOR THE OXYGEN SYSTEM BEFORE YOU DO THE MAINTENANCE. REF TO 777 AMM 35-00-00 AS AN ACCEPTED PROCEDURE. **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. Unless shown differently, these dimensions and tolerances are used: – Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Torque limits to tighten nuts and bolts are in SRM Chapter 51 4. Use the approved fastener and process material substitutions in accordance with SRM Chapter 51. 5. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length 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. 7. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed. 8. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part. 9. This service bulletin includes functional test procedures for the systems changed by this service bulletin. More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems. 10. Oxygen hose replacement may be done in any order after installation of sleeving.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 25 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT B. WORK INSTRUCTIONS**  **WARNING:**DO NOT PERMIT OIL, GREASE, DIRT OR OTHER FLAMMABLE MATERIALS TO GET NEAR THE PRESSURE OXYGEN SYSTEM. THESE MATERIALS CAN CAUSE A FIRE OR AN EXPLOSION WHEN THEY ARE NEAR PRESSURIZED OXYGEN. **CAUTION:** SPECIAL CARE MUST BE USED WHEN OXYGEN COMPONENTS ARE HANDLED AND WORKED WITH. BEFORE WORK IS DONE OF THE OXYGEN SYSTEM, READ THE SAFETY AND MAINTENANCE PROCEDURES. REFER TO 777 AMM 35-00-00 AND SOPM 20-70-01 AS ACCEPTED PROCEDURES. **CAUTION:** USE ONLY OXYGEN CLEAN COMPONENTS IN THE OXYGEN SYSTEM. IF YOU DO NOT USE OXYGEN CLEAN COMPONENTS, A FIRE OR EXPLOSION CAN OCCUR. THIS CAN CAUSE DAMAGE TO EQUIPMENT OR INJURIES TO PERSONS. **CAUTION:** MAXIMUM PERMITTED OPEN TIME FOR OXYGEN TUBES, HOSES AND COMPONENTS IS 5 MINUTES. **CAUTION:** KEEP A GAP BETWEEN THE ELECTRICAL WIRING AND THE OXYGEN HOSES TO PREVENT CHAFFING. THIS CAN CAUSE DAMAGE TO THE ELECTRICAL WIRING OR OXYGEN HOSES. REFER TO 777 AMM 35-00-00 AS AN ACCEPTED PROCEDURE. 1. Install sleeves and tape on low pressure oxygen hoses 57034-33N040220 and 57034-33N040320 in accordance with FIGURE 1. **NOTE:**Sleeve installation is not required on low pressure oxygen hose 57034-34N040100. 2. Remove the first officer's seat. Refer to 777 AMM 25-11-01 as an accepted procedure. - OPTIONAL This step improves access to the area but is not required. 3. Replace two low pressure oxygen hoses in the first officer side console in accordance with FIGURE 2. 4. Replace low pressure oxygen hose in the captain forward console interface in accordance with FIGURE 3. 5. Replace low pressure oxygen hose in the first officer stowage closet in accordance with FIGURE 4. 6. Replace low pressure oxygen hose in the observers console in accordance with FIGURE 5. 7. Perform leak test. Refer to 777 AMM 35-00-00 as an accepted procedure. 8. Restore flight deck interior in accordance with FIGURE 6 9. If removed, install the first officer's seat. Refer to 777 AMM 25-11-01 as an accepted procedure. 10. Put the airplane back into a serviceable condition.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1: April 19, 2012 26 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 1: LOW PRESSURE OXYGEN HOSE SLEEVE AND TAPE INSTALLATION**  **(SHEET 1 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 27 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.

**FIGURE 1: LOW PRESSURE OXYGEN HOSE SLEEVE AND TAPE INSTALLATION (SHEET 2 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 28 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** (a) 1 232U8002-731 SLEEVE Install (New) 1 Install on 57034- 33N040320 oxygen hose. (a) 3 232U8002-723 SLEEVE Install (New) 2 Install on 57034- 33N040220 oxygen hoses (b)

- - Tape Apply 3 P29 Tape - 1 inch wide On each end of the sleeve. (a) Cut sleeve with hot knife or other heated tool as needed. (b) Apply 2 to 3 layers of tape. After wrapping maximum width of wrapped tape is 1.25 inches.

**FIGURE 1: LOW PRESSURE OXYGEN HOSE SLEEVE AND TAPE INSTALLATION (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 29 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 2: FIRST OFFICER SIDE CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENTS**  **(SHEET 1 OF 4)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 30 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 2: FIRST OFFICER SIDE CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENTS**  **(SHEET 2 OF 4)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 31 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.
**More Data Qty**  **Identification Name**  **Task Step**  Refer to 777 AMM25-15-03 as an accepted procedure. (a) - - First Officer Forward Console Remove / Keep 1

Refer to 777 AMM35-11-18 as an accepted procedure. Oxygen masks donot need to be removed. - - Stowage Box Assembly Remove / Keep 2

Remove Upper Part only of Side Console Top. Refer to 777 AMM 25-15-01 asan accepted procedure. - - First Officer Side Con- sole Top Remove / Keep 3

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-91100 HOSE ASSY Remove 4

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-34N040100 HOSE ASSY Install (New) 5

Loose install First Officer Side Console Top. (b) - - First Officer Side Con- sole Top Install (Temporary) 6

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-81220 HOSE ASSY Remove 7

Refer to 777 AMM35-00-00 as an accepted procedure. Refer to APPENDIXA for more information. 1 57034-33N040220 HOSE ASSY Install (New) 8

Do not install Stowage Box. Insert Stowage Box and leave in place. (b) - - Stowage Box Assembly Insert 9

**FIGURE 2: FIRST OFFICER SIDE CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENTS (SHEET 3 OF 4)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 32 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** (a) The first officer forward console can be loosened and lifted a minimal amount to access the fasteners on the first officer side console top. For airplanes with an Electronic Flight Bag (EFB) installed, removal of the EFB display unit is not required. (b) Final installation will be done after the leak test.

**FIGURE 2: FIRST OFFICER SIDE CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENTS (SHEET 4 OF 4)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 33 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 3: CAPTAIN OXYGEN STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENT**  **(SHEET 1 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 34 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.

**FIGURE 3: CAPTAIN OXYGEN STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 2 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 35 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** Refer to 777 AMM35-11-18 as an accepted procedure. Oxygen masks donot need to be removed. - - Stowage Box Assembly Remove / Keep 1

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-81220 HOSE ASSY Remove 2

Refer to 777 AMM35-00-00 as an accepted procedure. Refer to APPENDIXA for more information. 1 57034-33N040220 HOSE ASSY Install (New) 3

Do not install Stowage Box. Insert Stowage Box and leave in place. (a) - - Stowage Box Assembly Insert 4

(a) Final installation will be done after the leak test.

**FIGURE 3: CAPTAIN OXYGEN STOWAGE BOX LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 36 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 4: FIRST OFFICER STOWAGE CLOSET LOW PRESSURE OXYGEN HOSE REPLACEMENT**  **(SHEET 1 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 37 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.

**FIGURE 4: FIRST OFFICER STOWAGE CLOSET LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 2 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 38 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step**

- - Close Out Seal Remove / Keep 1 9
- Screws Remove / Keep 2

- - Flight Deck Lining Remove / Keep 3 Refer to 777 AMM35-11-18 as an accepted procedure. Oxygen masks donot need to be removed. - - Stowage Box Assembly Remove / Keep 4

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-81220 HOSE ASSY Remove 5

Refer to 777 AMM35-00-00 as an accepted procedure. Refer to APPENDIXA for more information. 1 57034-33N040220 HOSE ASSY Install (New) 6

Do not install Stowage Box. Insert Stowage Box and leave in place. (a) - - Stowage Box Assembly Insert 7

(a) Final installation will be done after the leak test.

**FIGURE 4: FIRST OFFICER STOWAGE CLOSET LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 39 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 5: OBSERVERS CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENT**  **(SHEET 1 OF 3)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 40 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.

**FIGURE 5: OBSERVERS CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 2 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 41 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** Refer to 777 AMM35-11-18 as an accepted procedure. Oxygen masks donot need to be removed. - - Stowage Box Assembly Remove / Keep 1

(a) (b) (c) Move Observer Console away from wall togain access to oxygen hose. Refer to 777 AMM 25-15-05as an accepted procedure. - - Observers Console Move 2

Refer to 777 AMM35-00-00 as an accepted procedure. 1 57034-81320 HOSE ASSY Remove 3

Refer to 777 AMM35-00-00 as an accepted procedure. Refer to APPENDIXA for more information. 1 57034-33N040320 HOSE ASSY Install (New) 4

Do not install Stowage Box. Insert Stowage Box and leave in place. (d) - - Stowage Box Assembly Insert 5

(a) Optional - For better access, fold Second Observer Seat up to gain access to fasteners holding observer console to the wall. (b) Optional - For better access, slide First Observer Seat forward to gain access to fasteners holding observer console to the wall. (c) Optional - For better access, rotate top of Observer Console aft and the bottom of Observer Console forward. This can provide improved access to lower B-Nut. (d) Final installation will be done after the leak test.

**FIGURE 5: OBSERVERS CONSOLE LOW PRESSURE OXYGEN HOSE REPLACEMENT (SHEET 3 OF 3)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 42 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 6: FLIGHT DECK INTERIOR RESTORATION**  **(SHEET 1 OF 5)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 43 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 6: FLIGHT DECK INTERIOR RESTORATION**  **(SHEET 2 OF 5)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 44 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT FIGURE 6: FLIGHT DECK INTERIOR RESTORATION**  **(SHEET 3 OF 5)** Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 45 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**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 each airplane.
**More Data Qty**  **Identification Name**  **Task Step**  Install Upper Part of Side Console Top. Refer to 777 AMM25-15-01 as an accepted procedure. - - First Officer Side Con- sole Top Install (Kept) 1

Refer to 777 AMM25-15-03 as an accepted procedure. - - First Officer Forward Console Install (Kept) 2

**FIGURE 6: FLIGHT DECK INTERIOR RESTORATION (SHEET 4 OF 5)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 46 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT More Data**  **Qty Identification**  **Name Task**  **Step** Refer to 777 AMM25-15-05 as an accepted procedure. Only insert the Stowage Box. - - Observers Console Install (Kept) 3

- - Flight Deck Lining Install (Kept) 4 9
- Screws Install (Kept) 5

- - Close Out Seal Install (Kept) 6 Refer to 777 AMM35-11-18 as an accepted procedure. 4
- Stowage Box Assembly Install (Kept) 7

**FIGURE 6: FLIGHT DECK INTERIOR RESTORATION (SHEET 5 OF 5)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 47 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**1. Torque B-Nut to 190 +2/-9 inch-lbs. Refer to AMM 35-00-00 as an accepted procedure. 2. Ensure a 0.002 inch minimum clearance between B-Nut and Stowage Box fitting. See the figure below.

**APPENDIX A: OXYGEN HOSE TO STOWAGE BOX INSTALLATION (SHEET 1 OF 1)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: December 15, 2011 777-35A0027 Revision 1 April 19, 2012 48 of 48 **BOEING SERVICE BULLETIN 777-35A0027 ALERT**  **ALERT**