1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B54, -1B58, -1B64, -1B67, -1B70
The bracket P/N 2365M64G01, support bracket (bracket) P/N 2371M54G01, bracket P/N 2403M01G01, support bracket (bracket) P/N ER5586G01, bracket P/N ER6027G01, core FWD engine anti ice (EAI) support bracket (bracket) P/N ER6285G01, variable bypass valve (VBV) variable stator vane (VSV) bracket (bracket) P/N 2413M83G01, support bracket (bracket) P/N ER5312G01, and machine bolt (bolt) P/N AS3237-08 are affected by this Service Bulletin.
B.Description
This Service Bulletin releases an optimized bracketry configuration for the engine anti ice system.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's convenience/option.
NOTE:
This Service Bulletin can be accomplished in shop.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce new parts and reduce weight.
(2)Condition:
An opportunity was identified to improve current engine anti ice brackets design and reduce weight on mentioned hardware.
(3)Cause:
The mentioned bracketry has been identified during assembly as an opportunity to improve current design and assembly time.
(4)Improvement:
The proposed brackets reduce weight and optimize assembly time, having no impact in design requirements.
(5)Substantiation:
Substantiation is by analysis.
F.Approval
This Service Bulletin has been reviewed by the FAA and the repair(s) and modification(s) herein comply with the applicable Federal Aviation Regulations and are FAA APPROVED for installation in the model(s) listed in this Service Bulletin.
G.Manpower
After you get access to the fun hub module, you will need approximately 3 man-hours for each engine or component.
H.Weight and Balance
The complete compliance with this Service Bulletin decreases weight by 0.61 lb (0.28 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)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
 
CID: 573352
BPP: 10-10-00-01
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Qualified interchangeability.
The proposed hardware has to be introduced together at the same time.
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
 
2487M25G01
(1)
Bracket
Quote
(-)
Quote
 
2488M83G01
(1)
Bracket, Support
Quote
(-)
Quote
 
2489M21G01
(1)
Bracket, Core FWD EAI Support
Quote
(-)
Quote
 
2489M22G01
(1)
Bracket, Harness Support
Quote
(-)
Quote
 
2497M02G01
(1)
Bracket, VSV Support
Quote
(-)
Quote
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
 
2376M20G05/
G06
(X)
Propulsor Module Assembly
(SIN 0010C)
2376M20G05/
G06
(X)
RM
-/-
 
.2487M25G01
25-225, 72-00-02
(1)
Bracket
(SIN 38118)
.2365M64G01
25-210, 72-00-02
(1)
RE
5/B
 
.2488M83G01
25-226, 73-11-40
(1)
Bracket, Support
(SIN 38119)
.2371M54G01
25-210, 73-11-40
(1)
RE
5/B
 
.2489M22G01
01-141, 75-11-30
(1)
Bracket
(Old name)
Bracket, Harness Support
(New name)
(SIN 63717)
.2403M01G01
01-130, 75-11-30
(1)
RE
5/B
 
--
(1)
Bracket, Support
(SIN 59013)
.ER5586G01
25-100, 73-11-43
(1)
DE
5/B
 
--
(1)
Bracket
(SIN 6881V)
.ER6027G01
05-080, 73-21-66
(1)
DE
5/B
 
.2489M21G01
01-145, 75-11-20
(1)
Bracket, Core FWD EAI Support
(SIN 6101B)
.ER6285G01
01-140, 75-11-20
(1)
RE
5/B
 
.2497M02G01
10-250, 75-24-20
(1)
Bracket, VBV, VSV
(Old name)
Bracket, VSV Support
(New name)
(SIN 38116)
.2413M83G01
10-210, 75-24-20
(1)
RE
5/B
 
--
(1)
Bracket, Support
(SIN 59010)
.ER5312G01
25-070, 73-11-43
(1)
DE
5/B
 
.AS3237-08
25-080A, 73-11-43
(4)
Bolt, Machine
(SIN 59021)
.AS3237-08
25-080, 73-11-43
(6)
QTC
5/E
 
--
(-)
Bolt, Machine
(SIN 6882H)
.AS3237-08
05-090, 73-21-66
(2)
DE
5/E
Operation Codes
DE=Delete
RE=Replace
RM=Remains
QTC=Quantity Change
Change Code 5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Codes B=Old parts will be supplied until all old parts are sold. E=Old parts will be supplied, and can be used at other engine locations.
D.Parts Disposition
Use serviceable old parts for engines that have not changed.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Disassembly
(1)Disassembly instructions for the propulsor assembly have not changed. Refer to the GEnx-1B EM, 72-00-02, DISASSEMBLY 003.
B.Assembly
(1)Install the redesigned brackets (1 and 2, Figure 1, Sheet 2, 7, Sheet 3, and 9, Sheet 4) as follows:
(a)Put the bracket (1, Sheet 2) in position on the compressor forward case at the 12:30 o'clock position between VSV stages 1 and 2.
(b)Attach the bracket (1) with bolts (3).
(c)Torque the bolts (3) to 106-124 lb in. (12.0-14.0 Nm).
(d)Put bracket (2) in position on the bracket (1) and the actuator support (05-050, 72-32-00).
(e)Attach the bracket (2) to the bracket (1) with bolts (4).
(f)Attach the bracket (2) to the actuator support (05-050, 72-32-00) with bolts (5) and self locking nuts (nuts) (6).
(g)Torque the bolts (4) and the bolts (5) to 106-124 lb in. (12.0-14.0 Nm).
(h)Attach the bracket (7, Sheet 3) to the bracket (1, Sheet 2) with bolts (8, Sheet 3).
(i)Torque the bolts (8) to 106-124 lb in. (12.0-14.0 Nm).
(j)Put bracket (9, Sheet 4) on the bracket (2, Sheet 2).
(k) Attach the bracket (9, Sheet 4) with bolts (10).
(l)Torque the bolts (10) to 106-124 lb in. (12.0-14.0 Nm).
(m)Put the forward drain assembly hose tube (hose tube) (11) in position on the bracket (9).
(n)Attach the hose tube (11) to the bracket (9) with a cushion loop clamp (12) and a bolt (13).
(o) Torque the bolt (13) to 32-38 lb in. (3.6-4.3 Nm). Make sure that the cushion loop clamp (12) does not get twisted when the bolt is torqued.
(p) Attach W30 harness (14, Sheet 5) and W31 harness (15) to the bracket (9, Sheet 4).
(q)Attach tube (16, Sheet 5) to bracket (9, Sheet 4) with a split bushing (17, Sheet 5), a retaining strap (18), and two bolts (19). Torque the bolts (19) to 106-124 lb in. (12.0-14.0 Nm).
(2)Install the redesigned bracket (20, Sheet 6) as follows:
(a)Put the bracket (20) on the VSV actuator aft bearing support (01-180, 72-30-00).
(b)Attach the bracket (20) with bolts (21).
(c)Torque the bolts (21) to 106-124 lb in. (12.0-14.0 Nm).
(d)Put the support bracket (22) on the aft side of the bracket (20).
(e)Attach the bracket (22) with bolts (23).
(f)Torque the bolts (23) to 106-124 lb in. (12.0-14.0 Nm).
(g)Attach the strut drain hose tube (hose tube) (24) to bracket (20) with cushion loop clamp (25) and bolt (26).
(h)Torque the bolt (26) to 32-38 lb in. (3.6-4.3 Nm).
(i)Attach the fuel hose high pressure turbine (HPT) VSV manifold (manifold) (27, Sheet 7) to the bracket (20, Sheet 6) with bolts (28, Sheet 7).
(j)Torque the bolts (28) to 106-124 lb in. (12.0-14.0 Nm).
(k)Attach the ps3 air tube (tube) (29) to the bracket (20, Sheet 6) with a cushion loop clamp (30, Sheet 7) and a bolt (31). Install the cushion loop clamp (30) with the loop up.
(l)Torque the bolts (31) to 32-38 lb in. (3.6-4.3 Nm).
(m)Put the W05 harness (32) in the clips of the bracket (20, Sheet 6) with two electrical clip inserts (insert clips) (33, Sheet 7) at two locations.
Installation of New Bracket Configuration
Figure 1   (Sheet 1)
Installation of New Bracket Configuration
Figure 1   (Sheet 2)
Installation of New Bracket Configuration
Figure 1   (Sheet 3)
Installation of New Bracket Configuration
Figure 1   (Sheet 4)
Installation of New Bracket Configuration
Figure 1   (Sheet 5)
Installation of New Bracket Configuration
Figure 1   (Sheet 6)
Installation of New Bracket Configuration
Figure 1   (Sheet 7)