GE PROPRIETARY INFORMATION
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This technical data is considered EAR controlled pursuant to 15 CFR Parts 730-774 respectively. Transfer of this data by any means to a Non-US Person, whether in the United States or abroad, without the proper U.S. Government authorization (e.g., License, exemption, NLR, etc.), is strictly prohibited.
Copyright (2015) General Electric Company, U.S.A.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B54, -1B54/P1, -1B54/P2, -1B58, -1B58/P1, -1B58/P2, -1B64, -1B64/P1, -1B64/P2, -1B67, -1B67/P1, -1B67/P2, -1B70, -1B70/72/P1, -1B70/72/P2, -1B70/75/P1, -1B70/75/P2, -1B70/P1, -1B70/P2, -1B74/75/P1, -1B74/75/P2, -1B75/P1, -1B75/P2, -1B78/P2
The accessory gearbox (AGB) module assemblies P/N 2305M70G04, P/N 2305M70G05, P/N 2305M70G06, P/N 2305M70G07, and P/N 2305M70G08 are affected by this Service Bulletin.
B.Description
This Service Bulletin introduces a new main fuel/oil heat exchanger fuel seal (shield seal) P/N 2610M62P01 for the fuel/oil heat exchanger transfer tube.
C.Compliance
Category 5
GE recommends that you do this Service Bulletin as soon as the fuel/oil heat exchanger is removed from the engine.
NOTE:
This Service Bulletin can be accomplished on wing or in shop.
This Service Bulletin is offered to improve the reliability or performance of your GE product, or to help prevent the occurrence of the event or condition described in this Service Bulletin. If the operator elects not to participate in the bulletin, that decision will be taken into consideration by GE in evaluating future product performance issues that may arise in the operators fleet.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce a new part and improve reliability.
(2)Condition:
In the current fuel/oil heat exchanger transfer tube configuration, the O-ring is susceptible to foreign object contamination that causes the O-ring to degrade.
(3)Cause:
The fuel/oil heat exchanger transfer tube does not have an adequate external protection.
(4)Inspection:
The addition of the external shield seal prevents foreign contaminants from getting into the fuel/oil heat exchanger transfer tube assembly.
(5)Substantiation:
Substantiation is by analysis and test.
F.Approval
The data contained in this Service Bulletin has been reviewed by the appropriate governmental authority and the repair(s) and modification(s) herein comply with the applicable Aviation Regulations and are APPROVED for installation in the model(s) listed in this Service Bulletin.
G.Manpower
No additional man-hours are required to comply with this Service Bulletin.
H.Weight and Balance
Weight and balance are not changed.
I.References (Use the latest version of these documents)
GEK 9250, Commercial Engine Standard Practices Manual (SPM)
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
GEnx-1B S/B 79-0018, OIL - Fuel/Oil Heat Exchanger (79-21-00) - Improved Main Fuel/Oil Heat Exchanger with Indicating Capability
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
 
CID: 575420
 
BPP: 13-73-00-09
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
K.Interchangeability
Qualified interchangeability - Part added.
L.Software Accomplishment Summary
Not applicable.
2.MATERIAL INFORMATION
A.Material - Price and Availability
(1)Parts necessary to do this Service Bulletin:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
2610M62P01
(1)
Seal, Main Fuel/Oil Heat Exchanger Fuel
250.00
(1)
Quote
NOTE:
Prices are provided for planning purposes and are subject to change.
(2)Other Spare Parts:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
8021627*
(1)
Packing, EDP Shaft
NP
(-)
--
 
8024127*
(1)
Packing, EDP Housing
NP
(-)
--
*Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the Boeing Company.
NP = Not Provisioned
NOTE:
In order to gain access to the fuel/oil heat exchanger, the engine driven pump (EDP) may require to be removed. If the EDP is removed, the EDP shaft packing P/N 8021627 and EDP housing packing P/N 8024127 are required. These parts must be procured according to the GEnx-1B, Boeing 787 AMM, PMC-B787-81205-A2301-00, Data Module DMC-B787-A-29-11-02-00B-720A-A.
NOTE:
Prices are provided for planning purposes and are subject to change.
(3)Consumables:
 
Code Number
Description
 
C02-019
Oil - Engine Lubricating
(Boeing Reference D00552)
 
C10-182
Cloth, Cleaning for Aircraft Structural
(Boeing Reference G00034)
B.Industry Support Information
None.
C.Configuration Chart
 
New Part Number
Qty/ Eng
Part Name
Old Part Number/ IPC Location
Qty/ Eng
Op Code
Chg/ Sprt Code
 
2305M70G04/
G05/G06/G07/
G08
(X)
Accessory Gearbox Module Assembly
2305M70G04/
G05/G06/G07/
G08
(X)
RM
-/-
 
.2610M62P01
01-100, 79-21-00
(1)
Seal, Main Fuel/Oil Heat Exchanger Fuel
(SIN 40757)
--
(-)
AD
5/-
Operation Codes
AD=Add
RM=Remains
Change Codes
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Codes
None.
D.Parts Disposition
None.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.On-Wing Instructions
(1)If necessary, remove the EDP. Refer to the GEnx-1B, Boeing 787 AMM, TASK DMC-B787-A-29-11-02-00B-520A-A.
(2)Remove the fuel/oil heat exchanger (1, Figure 1). Refer to the GEnx-1B, Boeing 787 AMM, TASK DMC-B787-A-G79-21-01-00A-520A-A.
(3)Install the new shield seal (2, Figure 1) on the fuel outlet port transfer tube of the fuel/oil heat exchanger (1).
(4)Install the fuel/oil heat exchanger (1). Refer to the GEnx-1B, Boeing 787 AMM, TASK DMC-B787-A-G79-21-01-00A-720A-A.
(5)If necessary, install the EDP. Refer to the GEnx-1B, Boeing 787 AMM, TASK DMC-787-A-29-11-02-00-720A-A.
(6)Do the test(s) listed in the Power Plant Test Reference Table. Refer to the GEnx-1B, Boeing 787 AMM, 71-00-00, POWER PLANT - ADJUSTMENT/TEST, TASK DMC-B787-A-G71-00-00-09A-950A-A.
NOTE:
The new shield seal (2, Figure 1) must be correctly installed on the retainer flange face. The new shield seal (2) must be on its position until the bolts that hold the fuel/oil heat exchanger (1) be torqued to the fuel adaptor.
B.In-Shop Instructions
(1)Remove the fuel/oil heat exchanger (1, Figure 1) as follows:
(a)Remove the pre-GEnx-1B S/B 79-0018 fuel/oil heat exchanger (1, Figure 1) (MFOHX without Indicating Capability). Refer to the GEnx-1B EM, 72-00-05, DISASSEMBLY 001, Subtask 72-00-05-030-033.
(b)Remove the post-GEnx-1B S/B 79-0018 fuel/oil heat exchanger (1, Figure 1) (MFOHX with Indicating Capability). Refer to the GEnx-1B EM, 72-00-05, DISASSEMBLY 001, Subtask 72-00-05-030-033.
(2)Install the new shield seal (2, Figure 1) on the fuel outlet port transfer tube of the fuel/oil heat exchanger (1).
(3)Install the fuel/oil heat exchanger (1, Figure 1) as follows:
(a)Install the pre-GEnx-1B S/B 79-0018 fuel/oil heat exchanger (1, Figure 1) (MFOHX without Indicating Capability). Refer to the GEnx-1B EM, 72-00-05, ASSEMBLY 001, Subtask 72-00-05-430-041.
(b)Install the post-GEnx-1B S/B 79-0018 fuel/oil heat exchanger (1, Figure 1) (MFOHX with Indicating Capability). Refer to the GEnx-1B EM, 72-00-05, ASSEMBLY 001, Subtask 72-00-05-430-073.
NOTE:
The new shield seal (2, Figure 1) must be correctly installed on the retainer flange face. The new shield seal (2) must be on its position until the bolts that hold the fuel/oil heat exchanger (1) be torqued to the fuel adaptor.
Shield Seal Location
Figure 1