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Copyright (2017) 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, -1B76A/P2
This Service Bulletin is applicable to all GEnx-1B/P2 engines.
B.Description
This Service Bulletin introduces the cast fuel metering unit (FMU) VIN 8062-1094 (P/N 2122M20P07) to the GEnx-1B/P2 engines as an alternate to the current rapid advanced machining (RAM) FMU VIN 8062-1106 (P/N 2459M17P01).
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's option.
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
Do GEnx-1B S/B 73-0044 before you do this Service Bulletin.
NOTE:
The electronic engine control (EEC) software version B185 or higher must be installed before you comply with the intention of this Service Bulletin.
E.Reason
(1)Objective:
To introduce new parts and reduce cost of ownership.
(2)Condition:
During GEnx-1B engine upgrade to a GEnx-1B/P2 engine, the cast FMU needs to be replaced with a RAM FMU.
(3)Cause:
This alternate configuration will allow the cast FMU VIN 8062-1094 (P/N 2122M20P07) that is currently the type design on the GEnx-1B and GEnx-1B/P1 engine models to remain on the engine when engines are upgraded from previous configurations to the GEnx-1B/P2 configuration.
(4)Improvement:
Introducing the new FMU and the engine configuration box (ECB) monitoring configuration P/N 2140M98P03 or P/N 2140M98P04 [with a main fuel/oil heat exchanger differential pressure (DP) sensor] as alternate configurations to the GEnx-1B/P2 engine model.
(5)Substantiation:
Substantiation is by analysis, comparative analysis, and test.
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 FMU, you will need approximately 2.5 man-hours for each engine or component.
H.Weight and Balance
The complete compliance with this Service Bulletin decreases weight by 1.5 lb (0.7 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 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEnx-1B S/B 73-0044, ENGINE FUEL AND CONTROL - Electronic Engine Control (73-21-20) - Release of EEC Software Version B185
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
CID: 575930
BPP: 15-73-00-42156
J.Publications Affected
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Qualified interchangeability - Parts added.
The cast FMU VIN 8062-1094 (P/N 2122M20P07) and the ECB monitoring configuration P/N 2140M98P03 or P/N 2140M98P04 must be introduced as a complete set replacing the RAM FMU VIN 8062-1106 (P/N 2459M17P01), tube cap (cap) P/N J1315G08 for operability bleed valve port, and ECB monitoring configuration P/N 2140M98P01 or P/N 2140M98P02. The old and new hardware are two-way interchangeable as a set.
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
 
VIN 8062-1094**
(2122M20P07)
(1)
FMU
NP
(-)
--
 
187871**
(1)
Plug, Drain
NP
(-)
--
 
1223-1240**
(1)
Plug, Drain
NP
(-)
--
 
1391-0052**
(1)
Packing, Preformed
NP
(-)
--
 
1223-1241**
(1)
Plug, Machine
NP
(-)
--
 
1355-1349**
(1)
Packing, Preformed
NP
(-)
--
 
1391-0050**
(2)
Packing, Preformed
NP
(-)
--
 
1223-1242**
(2)
Plug, Machine
NP
(-)
--
 
AS3237-16*
(15)
Bolt, Machine
NP
(-)
--
 
2105M47P01
(3)
Gasket, FMU Seal
466.50
(1)
5
 
J1092P06
(9)
Nut, Self-locking
11.00
(20)
5
 
J1438P112
(1)
Packing
3.00
(1)
5
 
J1441P112
(2)
Retainer, Packing
26.00
(1)
5
 
J1438P129
(3)
Packing
37.75
(1)
5
 
J1441P129
(6)
Retainer, Packing
33.50
(1)
5
 
J1438P125
(1)
Packing
243.25
(1)
5
 
J1441P125
(2)
Retainer, Packing
51.00
(1)
5
 
J1438P118
(1)
Packing
2.45
(1)
5
 
J1441P118
(2)
Retainer, Packing
38.50
(1)
5
NP = Not Provisioned
NOTE:
Prices are provided for planning purposes and are subject to change.
*Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase.
**Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact the following:
 
Woodward Governor Co.
5001 North Second Street
Loves Park, Illinois 61111-5808
U.S.A.
(3)Consumables:
 
Code Number
Description
 
C02-019
Oil, Engine Lubricating
 
C10-071
Safety Wire, 0.020 or 0.032 in. dia.
 
C10-145
Safety Cable, J1285P01 (321 Stainless Steel AS 4536, AS 3510) 0.032 in. dia.
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
 
GENX- 1B64/P2G01/
P2G02
(X)
GEnx Model
GENX- 1B64/P2G01/
P2G02
(X)
RM
-/-
 
GENX- 1B67/P2G01/
P2G02
(X)
GEnx Model
GENX- 1B67/P2G01/
P2G02
(X)
RM
-/-
 
GENX- 1B70/75/P2G01/
P2G02
(X)
GEnx Model
GENX- 1B70/75/P2G01/
P2G02
(X)
RM
-/-
 
GENX- 1B70/P2G01/
P2G02
(X)
GEnx Model
GENX- 1B70/P2G01/
P2G02
(X)
RM
-/-
 
GENX- 1B74/75/P2G01/
P2G02
(X)
GEnx Model
GENX- 1B74/75/P2G01/
P2G02
(X)
RM
-/-
 
GEnx-1B76A/P2G01
(X)
GEnx Model
GEnx-1B76A/P2G01
(X)
RM
-/-
 
.2140M98P02
01-071, 72-00-00
(1)
Monitoring Configuration
(SIN 66M01)
.2140M98P02
01-071, 72-00-00
(1)
RM
-/-
 
.2140M98P01
01-070, 72-00-00
(ALT)
Monitoring Configuration
(SIN 66M01)
.2140M98P01
01-070, 72-00-00
(ALT)
RM
-/-
 
.2140M98P03
01-071A, 72-00-00
(ALT)
Monitoring Configuration
(SIN 66M01)
--
(-)
AD
5/-
 
.2140M98P04
01-071B, 72-00-00
(ALT)
Monitoring Configuration
(SIN 66M01)
--
(-)
AD
5/-
 
2305M70G06/
G08
(X)
Accessory Gearbox Module Assembly
2305M70G06/
G08
(X)
RM
-/-
 
.VIN 8062-1106
(2459M17P01)
01-021, 73-21-40
(1)
FMU
(SIN 30000)
.VIN 8062-1106
(2459M17P01)
01-021, 73-21-40
(1)
RM
-/-
 
.VIN 8062-1094
(2122M20P07)
01-021A, 73-21-40
(ALT)
FMU
(SIN 30000)
--
(-)
AD
5/-
Operation Codes
AD=Add
RM=Remains
Change Codes
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Codes
None.
D.Parts Disposition
None.
E.Tooling - Price and Availability
Refer to the applicable GEnx-1B EM or GEnx-1B Boeing 787 AMM tasks for the necessary tooling to remove and install the FMU and program the ECB.
3.ACCOMPLISHMENT INSTRUCTIONS
A.FMU Replacement
(1)For in-shop instructions, do as follows:
(a)Removal and installation instructions for the FMU (1 or 2, Figure 1) have not changed. Refer to the applicable GEnx-1B EM procedures.
(2)For on-wing instructions, do as follows:
(a)Removal and installation instructions for the FMU (1 or 2, Figure 1) have not changed. Refer to the GEnx-1B, Boeing 787 AMM, FMU Removal, DMC-B787-A-G73-21-04-00A-520A-A and FMU installation, DMC-B787-A-G73-21-04-00A-720A-A.
B.Reprogramming of the ECB Monitoring Configuration
CAUTION:
INCORRECT PROGRAMMING OF THE ECB WILL RESULT IN A NON-TYPE DESIGN CONFIGURATION OF THE ENGINE AND POSSIBLE UNDESIRED ENGINE OPERATING CHARACTERISTICS, WHICH INCLUDE SLOW TO START AND/OR ABNORMAL THRUST RESPONSE.
(1)For in-shop reprogramming, refer to the GEnx-1B EM, 72-00-00, SPECIAL PROCEDURE 008 and do as follows:
(a)Program the ECB monitoring configuration. Refer to Table 1 below to select the part number setting.
Table 1. Monitoring Configuration Part Number/Setting
 
Parameter
Decisions to Select the Monitoring Configuration Part Number/Setting
Part Number/ Setting
Displayed Value in Cockpit
 
GEnx-1B/P2 engine (all ratings)*
RAM FMU**
Fuel/Oil Heat Exchanger with DP Sensor***
 
Monitoring Configuration
No
No
No
2140M98P01
1
 
Yes
Yes
No
 
No
No
Yes
2140M98P02
2
 
Yes
Yes
Yes
 
Yes
No
No
2140M98P03
4
 
Yes
No
Yes
2140M98P04
7
 
*Refer to Figure 2 to identify whether the engine model is GEnx-1B/P2 and make sure with the engine data plate installed on the aft face of the fan hub frame (FHF) at the 11:00 o'clock position above the high pressure turbine active clearance control (HPTACC) booster bleed duct.
 
**Refer to Figure 1 to identify whether the installed FMU is the cast FMU (1) or the RAM FMU (2). The FMU is installed on the forward, right-hand side of the fuel adapter pad, located on the accessory gearbox (AGB) at the 3:00 o'clock position.
 
***Refer to Figure 1 to identify the installed fuel oil heat exchanger with the DP sensor or without the DP sensor. The fuel oil heat exchanger is installed on the fuel adapter pad, located on the AGB at the 3:00 o'clock position.
NOTE:
The engine serial number (ESN), HPTACC adjustment, and the engine configuration are not changed as a result of this modification.
(2)For on-wing reprogramming, refer to the GEnx-1B, Boeing 787 AMM, Configuration Type Box - Data Loading, DMC-B787-A-G73-21-07-00A-752A-A and do as follows:
(a)Program the ECB monitoring configuration. Refer to Table 1 above to select the part number setting.
(b)To make sure that the engine configuration values in the cockpit are correct, refer to the EEC configuration data function specified in the GEnx-1B, Boeing 787 AMM, G73-21-05, Software Operation, DMC-B787-A-G73-21-05-00D-110B-A.
(c)Do the post-maintenance operational checks as follows:
1Obey the Power Plant Test Reference Table requirements for the FMU replacement. Refer to the GEnx-1B, Boeing 787 AMM, Power Plant Test Reference Table, DMC-B787-A-G71-00-00-09A-950A-A.
FMU and Fuel/Oil Heat Exchanger Location
Figure 1   (Sheet 1)
FMU and Fuel/Oil Heat Exchanger Location
Figure 1   (Sheet 2)
FMU and Fuel/Oil Heat Exchanger Location
Figure 1   (Sheet 3)
Engine Data Plate Location
Figure 2