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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 (2018) General Electric Company, U.S.A.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B64, -1B64/P1, -1B64/P2, -1B67, -1B67/P1, -1B67/P2, -1B70, -1B70/75/P1, -1B70/75/P2, -1B70/P1, -1B70/P2, -1B70C/P1, -1B70C/P2, -1B74/75/P1, -1B74/75/P2, -1B76A/P2
This Service Bulletin has been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 956-638, 956-639, 956-649, and 956-654 and up.
These serial numbers are the best available data.
The machine bolt P/N MS9556-04 is affected by this Service Bulletin.
B.Description
This Service Bulletin introduces a new machine bolt P/N J643P02A.
C.Compliance
Category 9
Information only.
Impact E
This recommendation is to improve the cost of ownership, reduce maintenance requirements or is a product improvement.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce a new part.
(2)Condition:
The Boeing final assembly line reported a gap at the joint between the cushioned loop clamp P/N J1432P08 (SIN 53280) and the Boeing hydraulic pump P/N 53065-05G01 (SIN C00A6) during the installation of the hydraulic case drain hose tube P/N ER5350G01 (SIN 53200).
(3)Cause:
The old machine bolt that is used to assemble the hydraulic case drain hose tube (SIN 53200) to the Boeing hydraulic pump (SIN C00A6) is 0.051 inch (1.30 mm) longer than the Boeing hydraulic pump (SIN C00A6) threaded hole, which results in a gap at the joint between the cushioned loop clamp (SIN 53280) and the Boeing hydraulic pump (SIN C00A6).
(4)Improvement:
The new machine bolt is 0.063 inch (1.60 mm) shorter than the old machine bolt. This new machine bolt eliminates the gap at the joint location between the cushioned loop clamp (SIN 53280) and the Boeing hydraulic pump (SIN C00A6).
(5)Substantiation:
Substantiation is by analysis and comparative analysis.
F.Approval
The data contained in this Service Bulletin has been reviewed by the FAA or authorized entity representing the FAA 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 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
CID: 575633
BPP: 15-29-00-50303
J.Publications Affected
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Not interchangeable.
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
 
J643P02A
(1)
Bolt, Machine
43.00
(25)
5
NOTE:
Prices are provided for planning purposes and are subject to change.
(2)Other Spare Parts:
None.
(3)Consumables:
None.
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
 
738L103G01/
G02/G03/G04/
G05/G06
(X)
Kit, EBU FD
738L103G01/
G02/G03/G04/
G05/G06
(X)
RM
-/-
 
.J643P02A
05-020A, 71-00-00
(1)
Bolt, Machine
(SIN 53221)
.MS9556-04
05-020, 71-00-00
(1)
RE
3/E
Operation Codes
RE=Replace
RM=Remains
Change Codes
3=Not interchangeable.
Support Codes
E=Old parts will be supplied, and can be used at other engine locations.
D.Parts Disposition
Discard old parts.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Not applicable.