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Commercial Airplanes 777 Service Bulletin Number: 777-25-0617 Original Issue: June 06, 2014 ATA System: 2531 SUBJECT: EQUIPMENT/FURNISHINGS -Buffet/Galley - Steam Oven Water Filter Assembly 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.

9E991ECCN:

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, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, 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.

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Table of Contents

Summary5

1. PLANNING INFORMATION9

A. Effectivity9

1. Airplanes9

2. Spares Affected9

B. Concurrent Requirements9

C. Reason ................................................ 1 0 D. Description .............................................. 1 0 E. Compliance .............................................. 1 0 F. Approval ............................................... 1 0 G. Manpower .............................................. 1 1 H. Weight and Balance Changes .................................... 1 1 I. Electrical Load Data ......................................... 1 1 J. References .............................................. 1 1

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

2. Data Supplied with this Service Bulletin: ........................... 1 2

3. Installation Drawings Used in the Preparation of this Service Bulletin: ........... 1 2 K. Publications Affected ........................................ 1 2 L. Interchangeability and Intermixability of Parts ........................... 1 2 M. Software Accomplishment Summary ................................ 1 2

2. MATERIAL INFORMATION ........................................ 1 3 A. Material - Price and Availability ................................... 1 3 B. Industry Support Information .................................... 1 3 C. Parts Necessary for Each Airplane ................................. 1 3

1. Kits/Parts ............................................ 1 3

2. Parts and Materials Supplied by the Operator ........................ 1 3

3. Parts Modified and Reidentified ................................ 1 3

4. Parts Removed and Not Replaced .............................. 1 3 D. Parts Necessary to Change Spares ................................. 1 3 E. Special Tooling - Price and Availability ............................... 1 3 F. Special Tooling Necessary to do this Service Bulletin ....................... 1 3

3. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 5 A. GENERAL INFORMATION ..................................... 1 5 B. WORK INSTRUCTIONS ....................................... 1 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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Commercial Airplanes 777 Service Bulletin SummaryNumber: 777-25-0617Original Issue: June 06, 2014 ATA System: 2531 SUBJECT: EQUIPMENT/FURNISHINGS -Buffet/Galley - Steam Oven Water Filter Assembly Replacement

CONCURRENT REQUIREMENTS Refer to Paragraph 1.B., Concurrent Requirements.

BACKGROUND Accomplishment of this service bulletin will prevent the release of hot water from steam ovens in the passenger compartment galleys when the steam oven door is opened. Water can collect in the steam oven cavity because of Foreign Object Debris (FOD) in the water system that can prevent the correct operation of the solenoid valve.

If this service bulletin is not done, hot water can be released from the steam oven when the door is opened, which could result in injuries to the cabin crew.

A Boeing 787 operator reported a problem with steam ovens P/N ASN2001-1 and P/N ASN2001-12, whereby water can enter the steam oven cavity. This water then became heated and escaped when the door to the oven was opened causing injury to a member of the cabin crew. It was found that for these steam ovens, the current filter configuration lets FOD enter the steam oven water system, which can prevent a solenoid valve moving to its closed position and subsequently let water into the steam oven cavity. A new water filter assembly has been developed which includes a larger screen to prevent FOD from moving downstream to block the valve open.

As one Boeing 777 operator uses the same steam oven, Boeing has issued this service bulletin.

This service bulletin together with Jamco Corp SB ASN2001-25-3118, give instructions to replace the water filter assembly for each steam oven with a P/N ASN2001-1 or P/N ASN2001-12.

Boeing Service Related Problem (SRP) 777-SRP-25-0336 is related to this service bulletin.

This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.

ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph

1.F., Approval NoAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications Affected Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.

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ReferenceAffectedPlanning Data Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION (PRR 62777-98RS) For each steam oven P/N ASN2001-1 or P/N ASN2001-12, replace the water filter assembly in accordance with Jamco Corp SB ASN2001-25-3118.

EFFECTIVITY 777-300ER Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).

COMPLIANCE Boeing recommends that the change given in this service bulletin be done within 375 days after the original issue date of this service bulletin.

INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the configuration changes given in this service bulletin.

MANPOWER Refer to Paragraph 1.G., Manpower.

MATERIAL INFORMATION Operator Supplied Parts/Materials.

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

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BOEING SERVICE BULLETIN 777-25-0617 STA STA 246 445 STA 655 STA STA 825 825 +210 STA 1035 GALLEY F1 STA STA 1434 GALLEY M7 A 1434 +189 • GALLEY M2 STA I GALLEY M2A 1832 STA 2150 GALLEY A2 GALLEY A3

FOR EACH STEAM OVEN AT THE

IDENTIFIED LOCATIONS, REPLACE

THE WATER FILTER ASSEMBLY IN

ACCORDANCE WITH JAMCO SB STEAM OVEN ASN2001-25-3118.

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1. PLANNING INFORMATION A. Effectivity

1. Airplanes Refer to Service Bulletin Index D624W001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.

This service bulletin is applicable to 777-300ER Airplanes, line numbers 867, 875, 882, 933, 938, 976, 1023, 1081, and 1109 in 1 Group. The Variable Numbers and Group Information for the applicable airplanes is given below. Refer to PRR 62777-98RS for data about this change.

DESCRIPTIONCONFIGURATIONGROUP 777-300ER Airplanes with steam ovens P/N ASN2001-1 or P/N ASN2001-12 installed.

-1 Airplane Models:

777-300ER GroupVariable Number 1WD949 - WD957

2. Spares Affected None.

B. Concurrent Requirements The service bulletin listed below must be done at the same time as this service bulletin:

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DescriptionService BulletinCompany This service bulletin gives instructions to replace water filter assembly on steam ovens P/N ASN2001-1 and P/N ASN2001-12.

Jamco Corp SB ASN2001-25-3118, Revision No. 1 Jamco C. Reason Accomplishment of this service bulletin will prevent the release of hot water from steam ovens in the passenger compartment galleys when the steam oven door is opened. Water can collect in the steam oven cavity because of Foreign Object Debris (FOD) in the water system that can prevent the correct operation of the solenoid valve. If this service bulletin is not done, hot water can be released from the steam oven when the door is opened, which could result in injuries to the cabin crew.

This service bulletin together with Jamco Corp SB ASN2001-25-3118, give instructions to replace the water filter assembly for each steam oven with a P/N ASN2001-1 or P/N ASN2001-12.

Boeing Service Related Problem (SRP) 777-SRP-25-0336 is related to this service bulletin.

D. Description For each steam oven P/N ASN2001-1 or P/N ASN2001-12, replace the water filter assembly in accordance with Jamco Corp SB ASN2001-25-3118.

The work in this service bulletin is done in the maintenance zone(s) given below.

Affected Maintenance Zones ZoneModel 222, 231, 232, 251, 252, 261, 262777-300ER E. Compliance Boeing recommends that the change given in this service bulletin be done within 375 days 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. 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.

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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 HoursTask HoursNumber of PersonsTask

0.10.11ACCESS

(a)(a)-WATER FILTER AS-

SEMBLY REPLACE- MENT

0.10.11CLOSE ACCESS

0.2 (a)0.2 (a)TOTAL FOR EACH AIRPLANE

(a) The time to make the change to each steam oven in accordance with Jamco Corp SB ASN2001-25-3118 Service Bulletin is not included.

H. Weight and Balance Changes None.

I. Electrical Load Data Not changed.

J. References

1. Existing Data:

a. Engineering Change Memo PRR 62777-98RS

b. Boeing Service Related Problem (SRP) 777-SRP-25-0336

c. Service Bulletin Index D624W001

d. Jamco Corp Service Bulletin ASN2001-25-3118 NOTE: The supplier was told to send copies of the service bulletin to each operator.

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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-SectionPublication 25-31777 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 Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts.

M. Software Accomplishment Summary Not affected.

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