GE PROPRIETARY INFORMATION
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 in part.
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.
GE Aviation authorizes the Federal Aviation Administration to incorporate this document by reference in an Airworthiness Directive.
Copyright (2016) General Electric Company, U.S.A.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B64/P2, -1B67/P2, -1B70/P2, -1B70C/P2, -1B70/75/P2, -1B74/75/P2
This Service Bulletin is applicable to all GEnx-1B PIP2 engines.
Engines that have complied with the rework in GEnx-1B S/B 72-0309 are exempt from this Service Bulletin.
The GEnx engine assemblies P/N 2447M10G01 and P/N 2447M10G02 are affected by this Service Bulletin.
B.Description
This Service Bulletin provides a procedure to increase the flow path clearance between the fan stator module assembly abradable shroud and the fan blade of the fan module assembly by the GEnx-1B Cleaning, Inspection, and Repair Manual (CIR), 72-00-01, REPAIR 014 or GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM), 72-21-00, Specific Repair, TASK DMC-B787-A-G72-21-00-00A-664A-A.
C.Compliance
Category 2
GE recommends that you do this Service Bulletin as soon as possible without effect on revenue service but before December 31, 2016.
NOTE:
This Service Bulletin can be done on wing and/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:
Rework to open clearances between the fan blade and abradable shroud as outlined in step 3.A.(1)(a) of ACCOMPLISHMENT INSTRUCTIONS.
(2)Condition:
An engineering assessment has determined that the fan module assembly clearances are not optimized and there is a potential for fan rubs that can result in an unserviceable condition.
(3)Cause:
The fan module assembly clearances are not optimized for the GEnx-1B PIP2 engines.
(4)Improvement:
This rework will increase the clearance between the fan stator module assembly abradable shroud and the fan blade that reduces the potential for fan rubs.
(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
After you get access to the fan module assembly (inlet cowl removed or engine placed in a shipping stand), you will need approximately 16 hours to complete the fan grind rework procedure per the GEnx-1B CIR, 72-00-01, REPAIR 014 or GEnx-1B, Boeing 787 AMM, 72-21-00, Specific Repair, TASK DMC-B787-A-G72-21-00-00A-664A-A, for each engine.
H.Weight and Balance
The complete compliance with this Service Bulletin decreases weight by 2.5 lb (1.1 kg).
I.References (Use the latest version of these documents)
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
GEK 9250, Commercial Engine Standard Practices Manual (SPM)
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)
GEK 112866, GEnx-1B Illustrated Tool and Equipment Manual (ITEM)
GEnx-1B S/B 72-0309, ENGINE - General (72-00-00) - Fan Stator Module Assembly Rework for GEnx-1B PIP2 Engines
J.Publications Affected
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
GEK 112862, GEnx-1B Cleaning, Inspection, and Repair Manual (CIR)
K.Interchangeability
Not applicable.
L.Software Accomplishment Summary
Not applicable.
2.MATERIAL INFORMATION
A.Material - Price and Availability
(1)Parts necessary to do this Bulletin:
None.
(2)Other Spare Parts:
None.
(3)Consumables:
None.
B.Industry Support Information
Contact GE Customer Service Manager (CSM).
C.Configuration Chart
None.
D.Parts Disposition
Rework.
E.Tooling - Price and Availability
 
Tool Number
Description
 
11C3039G02
Bracket Set - Forward Propulsor, Ground Handling and Shipping (bracket set)
 
11C3359P02
Rollover Engine Ship Stand (shipping stand)
 
11C3443P03
Stand, Shipping (shipping stand)
 
11C4487P02
Stand, Shipping Engine/Propulsor (shipping stand)
 
11C4568P01
Stand, Full Engine Air Ship (shipping stand)
 
11C4576P01
Stand, Shipping - Engine/Propulsor GEnx-1B (shipping stand)
 
11C4628G01
Bracket Set - Forward Propulsor, Ground Handling and Shipping (bracket set), alternate tool to 11C3039G02
3.ACCOMPLISHMENT INSTRUCTIONS
A.General
(1)Compliance with this Service Bulletin can be achieved as follows:
(a)Rework the fan stator module assembly (Figure 1) by the GEnx-1B CIR, 72-00-01, REPAIR 014 or GEnx-1B, Boeing 787 AMM, 72-21-00, Specific Repair, TASK DMC-B787-A-G72-21-00-00A-664A-A and do as follows:
NOTE:
Procedure referenced in the GEnx-1B, Boeing 787 AMM is applicable to the GEnx-1B PIP1 and PIP2 engines, but there is a specific grind chart for GEnx-1B PIP2 engines.
1For the on-wing rework instructions, refer to step 3.B.
2For the in-shop rework instructions, refer to step 3.C.
B.On-Wing Rework
NOTE:
GE recommends that you do this procedure in a hangar or enclosed maintenance facility.
NOTE:
GE recommends to avoid any resposition of the aircraft during the rework procedure.
(1)Remove the inlet cowl and cover the tail pipe to avoid uncontrolled engine rotation, if outdoors. Refer to the GEnx-1B, Boeing 787 AMM, 71-11-01, Removal, TASK DMC-B787-A-G71-11-01-00A-520A.
(2)Apply masking to cover the booster inlet, outlet guided vane (OGV).
(3)Rework the fan stator module assembly (Figure 1). Refer to the GEnx-1B CIR, 72-00-01, REPAIR 014 or GEnx-1B, Boeing 787 AMM, 72-21-00, Specific Repair, TASK DMC-B787-A-G72-21-00-00A-664A-A and do as follows:
(a)Do a grind of sequences 1, 2, 4, 5, and 8 only.
(b)Post grind, measure the fan case FIR, and clearances at F1.0 and F1.5 only.
(4)Put a mark on the fan case with Complied with rework per SB 72-0314 in a 3x3 inch area located at 9 oclock forward looking aft (FLA) (Figure 1). Refer to the SPM, 70-16-09, PERMANENT INK MARKING STANDARD PRACTICE - EPOXY COATED INK MARKING.
(5)Remove all masking.
(6)Install the inlet cowl. Refer to the GEnx-1B, Boeing 787 AMM, 71-11-01, Installation, TASK DMC-B787-A-G71-11-01-00A-720A-A.
(7)Keep all measured data and submit to GE Aviation Fleet Support Contact for data storage.
NOTE:
The GE Aviation Fleet Support Contact Information is as follows:
 
Fleet Support:
http://www.geaviation.com/support/
 
OR
 
E-mail (USA): aviation.fleetsupport@ge.com
E-mail (China & Asia): aviation.fleetsupport.cn@ge.com
 
OR
 
GE Aviation
M/D Rm. 285
One Neumann Way
Cincinnati, OH 45215
U.S.A.
 
OR
 
International Phone: (513) 552-3272
U.S.A. Phone: 877-432-3272
China & Asia Phone: +86 21 38777666
C.In-Shop Rework
NOTE:
GE recommends to avoid any reposition of the engine during the rework procedure.
(1)Install the 11C3039 or 11C4628 bracket set on either 11C3443, 11C3359, 11C4487, 11C4568 or 11C4576 shipping stand. Refer to Figure 2.
(2)Install the engine in the 11C3443, 11C3359, 11C4487, 11C4586 or 11C4576 shipping stand. Refer to Figure 2.
(3)Apply masking to cover the booster inlet and OGV.
(4)Rework the fan stator module assembly (Figure 1). Refer to the GEnx-1B CIR, 72-00-01, REPAIR 014 and do as follows:
(a)Do a grind of sequences 1, 2, 4, 5, and 8 only.
(b)Post grind, measure the fan case FIR, and clearances at F1.0 and F1.5 only.
(5)Put a mark on the fan case with Complied with rework per SB 72-0314 in a 3x3 inch area located at 9 oclock FLA (Figure 1). Refer to the SPM, 70-16-09, PERMANENT INK MARKING STANDARD PRACTICE - EPOXY COATED INK MARKING.
(6)Remove all masking.
(7)Keep all measured data and submit to GE Aviation Fleet Support Contact for data storage. Refer to step 3.B.(7) for GE Aviation Fleet Support Contact Information.
Fan Stator Module Assembly
Figure 1  
Engine Placement in Shipping Stand with Bracket Support
Figure 2