TRANSMITTAL INFORMATION
REVISION 2 TO SERVICE BULLETIN 75-0003
Revision 2 is issued to update paragraph 1., PLANNING INFORMATION, and paragraph 2., MATERIAL INFORMATION.
Revision 1 was issued January 16, 2013. The original was issued on the August 20, 2012. Revision bars in the left margin identify changes.
1.PLANNING INFORMATION
A.Effectivity
 
* * * FOR GEnx-1B54, -1B54/P1, -1B58, -1B58/P1, -1B64, -1B64/P1, -1B67, -1B67/P1, -1B70, -1B70/72/P1, -1B70/75/P1, -1B70/P1, -1B74/75/P1, -1B75/P1
This Service Bulletin has been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 956-186 and up.
These serial numbers are the best available data.
The high pressure turbine active clearance control (HPTACC) manifold and the related hardware are affected by this Service Bulletin.
B.Description
This Service Bulletin introduces the HPTACC manifold and support system to reduce wear and improve repairability.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's convenience or option.
NOTE:
This Service Bulletin can be accomplished on wing or in shop.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce new parts, improve maintainability, and improve durability.
(2)Condition:
 The current six unique panel part numbers design has resulted in wear and reduced HPTACC system durability.
(3)Cause:
The pinned connections at six locations on the panel allow vibration, displacement, and wear. Spray on wear pad is not repairable.
(4)Improvement:
The wear pad replacement can be performed without replacing the entire panel due to the part count reduction from 11 to four released by this new HPTACC system design.
The released design has a spring dampener mounting system that allows the panels to absorb thermal displacement, but restrains the panel against vibration displacements.
(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 propulsor module assembly or HPTACC manifold, you will need approximately 6.0 man-hours to do the replacement portion of this Service Bulletin.
H.Weight and Balance
The complete compliance with this Service Bulletin increases weight by 0.45 lb (0.20 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: 573354, 573665, 573676
 
BPP: 11-75-00-14
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
The proposed and superseded hardware must be introduced as complete engine sets. Mixing the details of proposed and superseded hardware on the same engine 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:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
2379M42G01
(5)
Manifold, HPT Air
15,590.00
(1)
30
 
2379M43G01
(1)
Manifold, HPT Air
Quote
(-)
Quote
 
2379M44G01
(1)
Manifold, HPT Air
Quote
(-)
Quote
 
2379M45G01
(1)
Manifold, HPT Air
Quote
(-)
Quote
 
2418M10G01
(7)
Bracket, Support
Quote
(-)
Quote
 
2418M11G01
(1)
Bracket
Quote
(-)
Quote
 
2418M14G01
(1)
Bracket
Quote
(-)
Quote
 
2407M15G01
(5)
Bracket
Quote
(-)
Quote
 
2407M16G01
(7)
Bracket
Quote
(-)
Quote
 
2407M12G01
(2)
Bracket, HPT Manifold
Quote
(-)
Quote
 
2407M13G01
(1)
Bracket, HPT Manifold
Quote
(-)
Quote
 
MS9556-10*
(8)
Bolt, Machine
NP
(-)
--
 
MS9556-12*
(16)
Bolt, Machine
NP
(-)
--
 
NAS1149C0332R*
(8)
Washer, Flat
NP
(-)
--
 
2420M57P04
(16)
Spring, Flat Wire
40.50
(1)
30
 
2418M18P01
(16)
Retainer
Quote
(-)
Quote
 
2418M19P01
(16)
Retainer
181.75
(1)
30
 
1692M95P05
(10)
Bolt, Machine
45.25
(1)
Quote
 * Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase.
 NP: Not Provisioned
NOTE:
Prices are provided for planning purposes and are subject to change.
(2)Other Spare Parts:
None.
(3)Consumables:
 
Code Number
Description
 
C02-008
Petroleum Jelly (lubricant)
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
2376M20G05/G06
(X)
RM
-/-
 
.2379M42G01
15-030A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210A)
.2379M60G01
15-030, 75-24-30
(1)
RE
5/B
 
.2379M43G01
15-040A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210B)
.2379M58G01
15-040, 75-24-30
(1)
RE
5/B
 
.2379M44G01
15-050A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210C)
.2379M59G01
15-050, 75-24-30
(1)
RE
5/B
 
.2379M42G01
15-060A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210D)
.2379M60G01
15-060, 75-24-30
(1)
RE
5/B
 
.2379M42G01
15-070A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210E)
.2379M61G01
15-070, 75-24-30
(1)
RE
5/B
 
.2379M42G01
15-080A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210F)
.2379M62G01
15-080, 75-24-30
(1)
RE
5/-
 
.2379M45G01
15-010A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210G)
.2379M63G01
15-010, 75-24-30
(1)
RE
5/-
 
.2379M42G01
15-020A, 75-24-30
(1)
Manifold, HPT Air
(SIN 6210H)
.2379M60G01
15-020, 75-24-30
(1)
RE
5/-
 
.2418M10G01
34-241, 72-00-02
(7)
Bracket, Support
(SIN 62110)
.2319M12G01
34-230, 72-00-02
(15)
RE
5/B
 
.2418M11G01
34-221, 72-00-02
(1)
Bracket
(SIN 62111)
.2319M13G01
34-210, 72-00-02
(1)
RE
5/B
 
.2418M14G01
34-071, 72-00-02
(1)
Bracket
(SIN 62119)
.2319M21G01
34-060, 72-00-02
(1)
RE
5/B
 
.2407M15G01
34-111, 72-00-02
(5)
Bracket
(SIN 6211A)
.2319M22G01
34-100, 72-00-02
(7)
RE
5/B
 
.2407M16G01
34-091, 72-00-02
(7)
Bracket
(SIN 6211B)
.2319M23G01
34-080, 72-00-02
(8)
RE
5/B
 
.2407M12G01
34-360, 72-00-02
(2)
Bracket, HPT Manifold
(SIN 6211D)
--
(-)
AD
5/-
 
.2407M13G01
34-370, 72-00-02
(1)
Bracket, HPT Manifold
(SIN 6211E)
--
(-)
AD
5/-
 
.AS3237-10
10-090, 75-24-30
(3)
Bolt, Machine
(SIN 62122)
.AS3237-10
10-090, 75-24-30
15-110, 75-24-30
(19)
QTC
5/E
 
--
(-)
Bolt, Machine
(SIN 62123)
.AS3237-08
15-120, 75-24-30
(16)
DE
5/E
 
.MS9556-12
15-125, 75-24-30
(24)
Bolt, Machine
(SIN 62126)
--
(-)
AD
5/-
 
.NAS1149C0332R
15-130A, 75-24-30
(8)
Washer, Flat
(SIN 62130)
.1827M38P01
15-130, 75-24-30
(32)
RE
5/B
 
.2420M57P04
15-145, 75-24-30
(16)
Spring, Flat Wire
(SIN 62190)
--
(-)
AD
5/-
 
.2418M18P01
15-150, 75-24-30
(16)
Retainer
(SIN 62191)
--
(-)
AD
5/-
 
.2418M19P01
15-155, 75-24-30
(16)
Retainer
(SIN 62192)
--
(-)
AD
5/-
 
.1692M95P05
34-180A, 72-00-02
(112)
Bolt, Machine
(SIN 92520)
.1692M95P05
34-180, 72-00-02
(96)
QTC
5/-
 
.1692M95P06
34-190A, 72-00-02
(16)
Bolt, Machine
(SIN 92521)
.1692M95P06
34-190, 72-00-02
(32)
QTC
5/B
Operation Codes
AD=Add
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.Removal.
(1)Removal instructions of the HPTACC manifolds (1, 2, 3, 4, 5, 6, 7, 8, Figure 1) have not changed. Refer to the GEnx-1B EM, 72-00-02, DISASSEMBLY 003, Subtask 72-00-02-030-441.
(2)Removal instructions of the support bracket (1, Figure 2) and brackets (2, Figure 2) have not changed. Refer to the GEnx-1B EM, 72-50-00, DISASSEMBLY 001, Subtask 72-50-00-030-033.
(3)Removal instructions of the bracket (1, Figure 3), brackets (2, Figure 3), and brackets (3, Figure 3) have not changed. Refer to the GEnx-1B EM, 72-50-00, DISASSEMBLY 001, Subtask 72-50-00-030-050.
B.Installation.
(1)Install the brackets (1, 2, 3, 4, and 5, Figure 1) on the HPT stage 2 nozzle assembly as follows:
(a)Install the bracket (1, Figure 3, Sheet 4) at boltholes No. 2 and No. 120 with the nuts (34-030, 72-00-02). Hand tighten the nuts (34-030).
(b)Install the bracket (2, Figure 3, Sheet 4) at boltholes No. 8-9, 38-39, 53-54, 68-69, 83-84, 98-99, and 113-114 with the nuts (34-030). Hand tighten the nuts (34-030).
(c)Install the bracket (3, Figure 3, Sheet 4) at boltholes No. 45-47, 60-62, 75-77, 90-92, and 105-107 with the nuts (34-030). Hand tighten the nuts (34-030).
(d)Install the HPT manifold brackets (4, Figure 3, Sheet 4) at boltholes No. 15-16 and 30-31 with the nuts (34-030). Hand tighten the nuts (34-030).
(e)Install the HPT manifold bracket (5, Figure 3, Sheet 4) at boltholes No. 24-25 with the nuts (34-030). Hand tighten the nuts (34-030).
(f)Torque all the 32 nuts (34-030) in a criss-cross pattern to 368-432 lb in. (41.6-48.8 N.m).
(2)Install the brackets (1 and 2, Figure 2) on the HPT stage 2 nozzle assembly (34-011, 72-00-02) as follows:
(a)Install the bracket (1, Figure 2, Sheet 4) at boltholes No. 2 and No. 127 on the forward side of the flanges.
(b)Attach the bracket (1) with the bolts (34-190) and nuts (34-200) with the bolthead forward. Hand tighten the nuts (34-200).
(c)Install the brackets (2, Figure 2, Sheet 4) at boltholes No. 15-18, 31-34, 47-50, 63-66, 79,82, 95-98, and 111-114 on the forward side of the flanges.
(d)Attach the brackets (2) with the bolts (34-190) and nuts (34-200) with the bolthead forward. Hand tighten the nuts (34-200).
(e)Torque the 16 nuts (34-200) in a criss-cross pattern to 368-432 lb in. (41.6-48.8 N.m).
(3)Install the HPTACC manifolds as follows:
(a)Apply C02-008 lubricant inside the grooves of the seal housings (15-090, 75-24-30, Figure 1) and the connector (15-140).
(b)Install an air duct seal (15-100) in each end of the connector (15-140).
CAUTION:
BE CAREFUL WHEN YOU INSTALL THE CONNECTOR ONTO THE HPT AIR MANIFOLDS. YOU CAN CUT THE SEAL ON THE END OF THE HPT AIR MANIFOLD TUBE.
(c)Install the connector (15-140) on the clockwise end of the HPT air manifold (2, Figure 1, Sheet 3). Push the connector as far as possible onto the HPT air manifold (2).
(d)Put the HPT air manifold (2) on the HPT stator case at the 2 o'clock position aft looking forward (AFT).
(e)Install the machine bolt (11) and the washer (12) at the forward center bolthole and attach the HPT air manifold (2) to the bracket (5, Figure 3, Sheet 3).
(f)Install the flat wire spring (15) between the retainers (14 and 16).
(g)Install the machine bolt (13), the retainers (14 and 16), and the flat wire spring (15) at the forward corner boltholes and attach the HPT air manifold (2) to the bracket (4, Figure 3, Sheet 3).
(h)Install the remaining HPT air manifolds (3, 4, 5, 6, 7, 8, and 1, Figure 1) as follows:
1Install an air duct seal (15-100, 75-24-30) in each end of the seal housing (15-090).
CAUTION:
BE CAREFUL WHEN YOU INSTALL THE SEAL HOUSING ONTO THE HPT AIR MANIFOLDS. YOU CAN CUT THE SEAL ON THE END OF THE HPT AIR MANIFOLD TUBE.
2Install the seal housing (15-090) on the clockwise end of the HPT air manifold (3). Push the seal housing (15-090) as far as possible onto the HPT air manifold (3).
3Put the HPT air manifold (3) on the HPT stator case at the 4:00 o'clock position AFT.
4Install the machine bolt (11) and the washer (12) at the forward center bolthole and attach the HPT air manifold (3) to the bracket (2, Figure 3).
5Install the flat wire spring (15, Figure 1, Sheet 3) between the retainers (14 and 16).
6Install the machine bolt (13), the retainers (14 and 16) and the flat wire spring (15) at the forward center bolthole and attach the HPT air manifold (3) to the bracket (3, Figure 3, Sheet 3).
7To install the remaining HPT air manifolds (4, 5, 6, 7, 8, and 1, Figure 1) repeat steps 3.B.(3)(h)(1) through 3.B.(3)(h)(6).
(i)When all the manifolds are installed, carefully move the seal housings (15-090 ,75-24-30, Figure 1) and the connector (15-140) in a clockwise direction to connect the adjacent manifold. Be careful not to damage the air duct seal (15-100).
(j)Install the remaining flat wire spring (15) between the retainers (14 and 16).
(k)Install the machine bolt (13), the retainers (14 and 16), and the flat wire spring (15) at the AFT corner boltholes on the HPT air manifolds (1, 2, 3, 4, 5, 6, 7, and 8) and attach the HPT air manifolds (1, 2, 3, 4, 5, 6, 7, and 8) to the brackets (1 and 2, Figure 2, Sheet 3).
(l)Torque the bolts (11 and 13, Figure 1) to 106-124 lb in. (12.0-14.0 N.m).
Introduction of the HPT Air Manifold
Figure 1   (Sheet 1)
Introduction of the HPT Air Manifold
Figure 1   (Sheet 2)
Introduction of the HPT Air Manifold
Figure 1   (Sheet 3)
Installation of the Brackets in the AFT Flange
Figure 2   (Sheet 1)
Installation of the Brackets in the AFT Flange
Figure 2   (Sheet 2)
Installation of the Brackets in the AFT Flange
Figure 2   (Sheet 3)
Installation of the Brackets in the AFT Flange
Figure 2   (Sheet 4)
Installation of the Brackets in the Forward Flange
Figure 3   (Sheet 1)
Installation of the Brackets in the Forward Flange
Figure 3   (Sheet 2)
Installation of the Brackets in the Forward Flange
Figure 3   (Sheet 3)
Installation of the Brackets in the Forward Flange
Figure 3   (Sheet 4)