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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/P2, -1B58/P2, -1B64/P2, -1B67/P2, -1B70/72/P2, -1B70/75/P2, -1B70/P2, -1B74/75/P2, -1B75/P2, -1B78/P2
The screw P/N 1651M94P02 is affected by this Service Bulletin.
B.Description
This Service Bulletin releases a new screw P/N 1651M94P06.
C.Compliance
Category 5
GE recommends that you do this Service Bulletin as soon as the screw P/N 1651M94P02 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 remove a part from service.
(2)Condition:
Interference between the unthreaded portion of the screw shank and the nut plate thread has been observed during the assembly of the OGV fairing.
(3)Cause:
The current screw P/N 1651M94P02 thread is too short which creates a risk of the shank engagement into the thread of the nut plate.
(4)Improvement:
This change corrects an assembly interference issue and prevents the mating nut plate threads from bottoming out on the screw shank during assembly. This change eliminates the risk of screw shank engagement into the nut thread.
(5)Substantiation:
Substantiation is by analysis and comparative analysis.

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
The complete compliance with this Service Bulletin decreases
weight by 0.160
lb (0.072
kg).
I.References (Use the latest version of these documents)
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEnx-1B Boeing 787 Aircraft Maintenance Manual (AMM)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
 
CID: 575375
 
BPP: 14-72-21-06
J.Publications Affected
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEnx-1B Boeing 787 Aircraft Maintenance Manual (AMM)
K.Interchangeability
Once removed, screw P/N 1651M94P02 should not be installed at this location.
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
 
1651M94P06
(48)
Screw
31.75
(1)
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
 
2447M18G01
(X)
Assembly, Aft Fan Stator Case
2447M18G01
(X)
RM
-/-
 
.1651M94P06
11-210B, 72-21-00
(48)
Screw
(SIN 84128)
.1651M94P02
11-210, 72-21-00
(48)
RE
5/E
 
.1651M94P14
11-210A, 72-21-00
(ALT)
Screw
(SIN 84128)
.1651M94P14
11-210A, 72-21-00
(ALT)
RM
-/-
Operation Codes
RE=Replace
RM=Remains
Change Code
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Code
E=Old parts will be supplied, and can be used at other engine locations.
D.Parts Disposition
Use serviceable old parts at other engine locations.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Removal
(1)For on wing procedure, remove the screw. Refer to the GEnx-1B Boeing 787 AMM, DMC-B787-A-G72-21-03-00A-520A-A.
(2)For in shop procedure, remove the screw (1, Figure 1). Refer to the GEnx-1B EM, 72-21-00, DISASSEMBLY 001.
B.Installation
(1)For on wing procedure, install the screw. Refer to the GEnx-1B Boeing 787 AMM, DMC-B787-A-G72-21-03-00A-720A-A.
(2)For in shop procedure, install the screw (1, Figure 1). Refer to the GEnx-1B EM, 72-21-00, ASSEMBLY 002, CONFIG 02.
Replacement of the Screw
Figure 1