GE Designated: -CONFIDENTIAL-
The information contained in this document is GE proprietary information and is disclosed in confidence. It is the property of GE and shall not be used, disclosed to others or reproduced without the express written consent of GE, including, but without limitation, it is not to be used in the creation, manufacture, development, or derivation of any repairs, modifications, spare parts, designs, or configuration changes or to obtain FAA or any other government or regulatory approval to do so. If consent is given for reproduction in whole or in part, this notice and the notice set forth on each page of this document shall appear in any such reproduction in whole or part.
This technical data is considered subject to the Export Administration Regulations (EAR) pursuant to 15 CFR Parts 730-774. Transfer of this data by any means to a Non-U.S. 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 (2019) General Electric Company, U.S.A.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B64/P2, -1B67/P2, -1B70/75/P2, -1B70/P2, -1B70C/P2, -1B74/75/P2, -1B76/P2, -1B76A/P2
This Service Bulletin has been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 958-311 and up.
These serial numbers are the best available data.
The bifurcation manifold P/N 2431M35G01 and electrical clip inserts (clip inserts) P/N 1793M46P03 and P/N 1793M46P04 are affected by this Service Bulletin.
B.Description
This Service Bulletin eliminates two plastic clip inserts from the harness support spring clip by replacing the old bifurcation manifold with new lower bifurcation oil manifold (bifurcation manifold) P/N 2772M12G01 or reworking the old bifurcation manifold to P/N 2772M13G01 by replacing the existing clips with new clips P/N AS5117-03 and P/N AS5117-04 and the existing solid rivets with new solid rivets P/N AN123170 and P/N AN123164.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's convenience.
Impact E
This recommendation is to improve the cost of ownership, reduce maintenance requirements or is a product improvement.
NOTE:
This Service Bulletin can be done on wing or in shop.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce new parts and remove parts from service.
(2)Condition:
The current clip inserts require a complex assembly process, which leads to more time for field shop operations.
(3)Cause:
The plastic clip inserts were introduced as a response to customer concerns on poor routing experience for legacy sustaining programs.
(4)Improvement:
Successful field harness experience across engine programs has demonstrated that harness peek overbraid at the spring clips performs its chafe guard purpose when properly integrated with spring clips.
The new design reduces the parts count, improves field shop operations, eliminates potential foreign object damage concerns, and resolves special considerations to abate clip inserts damage and their proliferation by error-proofing maintenance activity. To enable clip inserts removal, harness supports are being updated to downsize clip sizes.
(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
After you get access to the bifurcation manifold, you will need approximately 1.0 man-hour for each engine or component.
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)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
CID: 551316, 551316-3
BPP: 17-72-00-67474
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Qualified interchangeability.
The old configuration is two-way interchangeable as full set with the new configuration. Interchangeability at the piece-part level is not permitted.
L.Software Accomplishment Summary
Not applicable.
2.MATERIAL INFORMATION
A.Material - Price and Availability
(1)Parts necessary to do this Service Bulletin:
For replacement of the bifurcation manifold:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
J1438P125
(2)
Packing
275.75
(1)
5
 
2364M47P01
(2)
Gasket
240.00
(1)
5
NOTE:
Prices are provided for planning purposes and are subject to change.
(2)Other Spare Parts:
For rework of the bifurcation manifold:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
AN123164*
(1)
Rivet, Solid
NP
(-)
--
 
AN123170*
(2)
Rivet, Solid
NP
(-)
--
 
AS5117-03*
(1)
Clip
NP
(-)
--
 
AS5117-04*
(1)
Clip
NP
(-)
--
 
2772M12G01**
(1)
Manifold, Lower Bifurcation Oil
10,390.00
(1)
Quote
*Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase.
**The new bifurcation manifold is not necessary in case of rework of the old bifurcation manifold.
NP = Not Provisioned
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
 
2447M10G03
(X)
GEnx Engine Assembly
2447M10G03
(X)
RM
-/-
 
--
(-)
Insert, Electrical Clip
(SIN 67177)
.1793M46P03
75-020, 73-21-65
(1)
DE
5/D
 
--
(-)
Insert, Electrical Clip
(SIN 67178)
.1793M46P04
50-040A, 73-21-65
(1)
DE
5/D
 
.2772M12G01
10-370A, 79-22-10
(1)
Manifold, Bifurcation
(Old Name)
Manifold, Lower Bifurcation Oil
(New Name)
(SIN 99006)
.2431M35G01
10-370, 79-22-10
(1)
RE
5/B
 
(GEnx-1B/P2 FIELD ONLY)
 
2447M10G01/
G02/G03
(X)
GEnx Engine Assembly
2447M10G01/
G02/G03
(X)
RM
-/-
 
--
(-)
Insert, Electrical Clip
(SIN 67177)
.1793M46P03
75-020, 73-21-65
(1)
DE
5/D
 
--
(-)
Insert, Electrical Clip
(SIN 67178)
.1793M46P04
50-040A, 73-21-65
(1)
DE
5/D
 
.2772M12G01
10-370A, 79-22-10
(1)
Manifold, Bifurcation
(Old Name)
Manifold, Lower Bifurcation Oil
(New Name)
(SIN 99006)
.2431M35G01
10-370, 79-22-10
(1)
RE
5/B
 
.2772M13G01
10-370B, 79-22-10
(1)
Manifold, Bifurcation
(Old Name)
Manifold, Lower Bifurcation Oil
(New Name)
(SIN 99006)
.2431M35G01
10-370, 79-22-10
(1)
RW
5/B
 
..AS5117-03
10-374, 79-22-10
(1)
Clip
(SIN 99006-18)
--
(-)
AD
5/-
 
..AS5117-04
10-373, 79-22-10
(1)
Clip
(SIN 99006-19)
--
(-)
AD
5/-
 
..AN123170
10-372, 79-22-10
(2)
Rivet, Solid
(SIN 99006-15)
--
(-)
AD
5/-
 
..AN123164
10-371, 79-22-10
(1)
Rivet, Solid
(SIN 99006-14)
--
(-)
AD
5/-
Operation Codes
AD=Add
DE=Delete
RE=Replace
RM=Remains
RW=Rework
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=Old parts will be supplied for engines that have not been changed by this Service Bulletin.
D.Parts Disposition
Use serviceable old parts at other engine locations.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Removal
(1)Remove the old bifurcation manifold (1, Figure 1). Removal instructions have not changed. Refer to the GEnx-1B EM, 72-00-03, DISASSEMBLY 001 and do as follows:
(a)Remove and discard the clip inserts (2 and 3, Figure 1).
(b)Rework the old bifurcation manifold (1, Figure 1) as specified in paragraph 3.B., Rework.
OR
(c)Install a new bifurcation manifold (1, Figure 1) as specified in paragraph 3.C., Installation.
B.Rework
(1)Rework the old bifurcation manifold (1, Figure 1) as follows:
CAUTION:
MAKE SURE NOT TO DAMAGE THE BRACKET DURING DRILLING, OTHERWISE, REPLACEMENT OF THE COMPLETE BIFURCATION MANIFOLD (1) COULD BE NECESSARY.
(a)Drill out the three existing solid rivets that hold the two existing clips to remove them from the support bracket. Refer to the SPM, 70-13-00, RIVETED JOINTS.
(b)Discard the two existing clips.
(c)Install the new clips (4 and 5, Figure 1). Refer to the SPM, 70-13-00, RIVETED JOINTS and do as follows:
1Install the new clips (4 and 5, Figure 1) with the solid rivets (6 and 7) as specified in the SPM, 70-13-01, ACCEPTABILITY LIMITS FOR FORMED RIVETS.
(d)Reidentify the old bifurcation manifold (1, Figure 1) as follows:
1Find the GE part number marking location. Refer to Figure 1.
2Cross out the existing GE part number. Make sure to keep the old part number legible.
3Identify the reworked bifurcation manifold (1) with the new part number. Refer to the SPM, 70-16-03, ELECTROCHEMICAL ETCH MARKING and Figure 1 of this Service Bulletin.
C.Installation
(1)Install the new or reworked bifurcation manifold (1, Figure 1). Installation instructions have not changed. Refer to the GEnx-1B EM, 72-00-03, ASSEMBLY 001.
Bifurcation Manifold Locations
Figure 1   (Sheet 1)
Bifurcation Manifold Locations
Figure 1   (Sheet 2)
Bifurcation Manifold Locations
Figure 1   (Sheet 3)