1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B54, -1B58, -1B64, -1B67, -1B70
The new carbon seal lube nozzle P/N 2373M95G01 and the new No. 1 bearing oil nozzle P/N 2381M17G01 have been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 956-127 and up.
These serial numbers are the best available data.
The old carbon seal lube nozzle P/N 2324M23G01 and the old No. 1 bearing oil nozzle P/N 2301M47G01 are affected by this Service Bulletin.
B.Description
This Service Bulletin releases the new carbon seal lube nozzle P/N 2373M95G01 and the new No. 1 bearing oil nozzle P/N 2381M17G01.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's option.
NOTE:
This Service Bulletin can be accomplished in shop.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce new parts.
(2)Condition:
The old carbon seal lube nozzle P/N 2324M23G01 and the old No. 1 bearing oil nozzle P/N 2301M47G01 are machined from barstock.
(3)Cause:
New parts have improved manufacturing process capability, old parts were machined from barstock, new parts are a machined casting design. Additionally, the new design improves a screw thread breakout issue that was experienced during development testing.
(4)Improvement:
The new carbon seal lube nozzle P/N 2373M95G01 and the new No. 1 bearing oil nozzle P/N 2381M17G01 are a machined casting design.
(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
No additional man-hours are required to comply with this Service Bulletin.
H.Weight and Balance
The complete compliance with this Service Bulletin decreases weight by 0.10 lb (0.04 kg).
I.References (Use the latest version of these documents)
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)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
 
CID: 547362
 
BPP: 07-72-23-02/-03
J.Publications Affected
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)
K.Interchangeability
The No. 1 bearing oil nozzle design change, incorporates a new two bolt flange design to replace the old two stud configuration in which the studs were integral with the No. 1 bearing oil nozzle. The No. 1 bearing oil nozzle design change is interchangeable as a set because the new nozzle design requires the addition of the two new machine bolts P/N AS3580-5-30.
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
 
2373M95G01
(1)
Nozzle, Carbon Seal Lube
Quote
(-)
Quote
 
2381M17G01
(1)
Nozzle, No. 1 Bearing Oil
Quote
(-)
Quote
 
AS3580-5-30
(2)
Bolt, Machine
Quote
(-)
Quote
 
J1438P011
(2)
Packing
Quote
(-)
Quote
NOTE:
Prices are provided for planning purposes and are subject to change.
(2)Other Spare Parts:
None.
(3)Consumables:
 
Code Number
Description
 
C02-019
Oil, Engine Lubricating (engine oil)
 
C02-023
Oil, Engine Lubricating (engine oil)
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
 
2305M23G01
(X)
Bearing Assembly, No. 1
2305M23G01
(X)
RM
-/-
 
.2373M95G01
01-050A, 72-23-00
(1)
Nozzle, Carbon Seal Lube
.2324M23G01
01-050, 72-23-00
(1)
RE
2/B
 
.2381M17G01
01-101, 72-23-00
(1)
Nozzle, No. 1 Bearing Oil
.2301M47G01
01-100, 72-23-00
(1)
RE
5/B
 
.AS3580-5-30
01-045, 72-23-00
(2)
Bolt, Machine
--
(-)
AD
5/-
 
Operation Codes
AD=Add
RE=Replace
RM=Remain
Change Codes 2=Two-way interchangeable.
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Code B=Old parts will be supplied until all old parts are sold.
D.Parts Disposition
None.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Removal of the Carbon Seal Lube Nozzle and the No. 1 Bearing Oil Nozzle
(1)Removal instructions for the carbon seal lube nozzle (1, Figure 1) and the No. 1 bearing oil nozzle (2) have not changed. Refer to the GEnx-1B EM, 72-23-00, DISASSEMBLY 001.
B.Installation of the New Carbon Seal Lube Nozzle and the New No. 1 Bearing Oil Nozzle
(1)Install the No. 1 bearing oil nozzle (4, Figure 1) and the carbon seal lube nozzle (3) as follows:
WARNING:
LUBRICATING OILS MAY CAUSE SKIN, EYE AND RESPIRATORY IRRITATION WITH PROLONGED OR REPEATED CONTACT. USE PROPER PERSONAL PROTECTIVE EQUIPMENT TO PREVENT SKIN AND EYE CONTACT. IF EYE OR SKIN CONTACT OCCURS FLUSH EYES WITH WATER AND/OR WASH SKIN THOROUGHLY WITH SOAP AND WATER.
(a)Apply engine oil (C02-019) or engine oil (C02-023) to the packings, the self-locking nuts, and the lead-in chamfers of the No. 1 bearing oil nozzle (4).
(b)Install the packings in the groove on the No. 1 bearing oil nozzle (4) and in the groove on the carbon seal lube nozzle (3).
(c)Install the No. 1 bearing oil nozzle (4) in the aft side of the forward flange of the No. 1 bearing housing.
(d)Install the machine bolts (5) in the No. 1 bearing oil nozzle (4) and through the forward flange of the No. 1 bearing housing.
(e)Install the carbon seal lube nozzle (3) in the forward side of the forward flange of the No. 1 bearing housing.
(f)Install the self-locking nuts on the machine bolts (5).
(g)Torque the self-locking nuts to 235-275 lb in. (26.6-31.1 Nm). Hold the machine bolts (5) while the self-locking nuts are torqued.
Introduction of Carbon Seal Lube Nozzle and No. Bearing 1 Oil Nozzle
Figure 1   (Sheet 1)
Introduction of Carbon Seal Lube Nozzle and No. Bearing 1 Oil Nozzle
Figure 1   (Sheet 2)
Introduction of Carbon Seal Lube Nozzle and No. Bearing 1 Oil Nozzle
Figure 1   (Sheet 3)