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Copyright (2016) 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
This Service Bulletin has been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 956-690 and up.
These serial numbers are the best available data.
The mid fan shaft P/N 2332M81G04 is affected by this Service Bulletin.
B.Description
This Service Bulletin introduces a new mid fan shaft P/N 2332M81G05 with improved corrosion resistance coating.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's convenience.
NOTE:
This Service Bulletin can be accomplished in shop.
D.Concurrent Requirements
None.
 
LIFE LIMIT
 
The life limit for the new mid fan shaft P/N 2332M81G05 has been added to the GEnx-1B Engine Manual (EM), Section 05-11-04 by Temporary Revision (TR) 05-0060. Refer to the GEnx-1B EM for the life limit(s) of this part.
E.Reason
(1)Objective:
To introduce a new part and improve reliability.
(2)Condition:
Corrosion on the mid fan shaft inner surface has been observed at shop visit inspection.
(3)Cause:
The oil leakage causes the corrosion pits on the mid fan shaft inner surface. The aluminium coating has not been successful protecting the mid fan shaft inner diameter from the corrosion.
(4)Improvement:
The new mid fan shaft has special seal coating on the mid fan shaft inner diameter and the aft flange surface in order to improve corrosion resistance.
(5)Substantiation:
Substantiation is by 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
Weight and balance are not changed.
I.References (Use the latest version of these documents)
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR)
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: 943063
BPP: 15-72-58-41538 1B
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Qualified interchangeability.
L.Software Accomplishment Summary
Not applicable.
2.MATERIAL INFORMATION
A.Material - Price and Availability
(1)Parts necessary to do this Service Bulletin:
None.
(2)Other Spare Parts:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
2332M81G05
(1)
Shaft, Mid Fan
349,000.00
(1)
Quote
NOTE:
Prices are provided for planning purposes and are subject to change.
(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
 
2376M20G06/G07/
G08/G09
(X)
Propulsor Module Assembly
2376M20G06/G07/
G08/G09
(X)
RM
-/-
 
2447M20G01/G02/
G03/G04
(X)
Propulsor Module Assembly
2447M20G01/G02/
G03/G04
(X)
RM
-/-
 
.2305M64G05
45-011A, 72-00-02
(1)
Shaft, Mid Fan
(SIN 81000)
.2305M64G05
45-011A, 72-00-02
(1)
RM
-/-
 
..2332M81G05
01-012A, 72-58-00
(1)
Shaft, Mid Fan
(SIN 810A0)
..2332M81G04
01-012, 72-58-00
(1)
RE
5/B
Operation Codes
RE=Replace
RM=Remains
Change Codes
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Codes
B=Old parts will be supplied until all old parts are sold.
D.Parts Disposition
None.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.General
(1)Removal and installation procedures for the mid fan shaft (Figure 1) have not changed. Refer to the GEnx-1B EM, 72-58-00, DISASSEMBLY 001 (CONFIGURATION 01 or CONFIGURATION 02) and ASSEMBLY 001 (CONFIGURATION 01 or CONFIGURATION 02).
Mid Fan Shaft Location
Figure 1