TRANSMITTAL INFORMATION
REVISION 1 TO SERVICE BULLETIN 79-0004
Revision 1 is issued to effectively cancel the intent of this Service Bulletin. GE Aviation no longer recommends the accomplishment of this Service Bulletin.
The original was issued April 02, 2012. Revision bars in the left margin identify changes.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B54, -1B58, -1B64, -1B67, -1B70
 This change was cancelled and was removed from production.
The screen assemblies P/N LR47504, P/N LR47505, and P/N LR47507 that belong to the lube unit P/N LR47760E1 are affected by this Service Bulletin.
B.Description
 GE Aviation no longer recommends the accomplishment of this Service Bulletin.
 The alternative preformed packings, P/N J1438P916, P/N J1438P918, and P/N J1438P924 are still acceptable alternative parts for the current screen assemblies.
This Service Bulletin releases the screen assemblies with new magnetic chip detector (MCD) P/N LR48211, P/N LR48212, and P/N LR48214 on the lube and scavange pump (lube unit) P/N LR47760E1. This Service Bulletin also adds the alternative preformed packings P/N J1438P916, P/N J1438P918, and P/N J1438P924 to the lube unit.
C.Compliance
 Category 9
 Information only. GE Aviation no longer recommends the accomplishment of this Service Bulletin.
NOTE:
This Service Bulletin can be accomplished on wing.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce new parts.
(2)Condition:
Under certain engine conditions, the capture efficiency of the MCD located in the screen assembly can be insufficient.
(3)Cause:
Insufficient capture efficiency of the MCD.
(4)Improvement:
The new screen assembly contains a more powerful magnet with better capture efficiency.
(5)Substantiation:
Substantiation is by comparative analysis, analysis, and test.
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
Weight and balance are not changed.
I.References (Use the latest version of this document)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
  NOTE:
The reference document listed below is for the engine manufacturer's internal use only:
 
CID: 573299, 573821
 
BPP: 11-79-00-10.A
J.Publications Affected
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
K.Interchangeability
Two-way interchangeable.
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
 
LR48211*
(1)
Assembly, Screen
NP
(-)
--
 
LR48214*
(3)
Assembly, Screen
NP
(-)
--
 
LR48218*
(1)
Assembly, Screen
NP
(-)
--
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. To procure parts, contact the following:
Fiatavio SPA Corso Ferrucci 112 Turin
Italy
(2)Other Spare Parts:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
LR26393-916
(1)
Packing, Preformed
Quote
(-)
Quote
 
J1438P916
(ALT)
Packing, Preformed
Quote
(-)
Quote
 
LR26393-918
(1)
Packing, preformed
Quote
(-)
Quote
 
J1438P918
(ALT)
Packing, Preformed
Quote
(-)
Quote
 
LR26393-924
(1)
Packing, Preformed
Quote
(-)
Quote
 
J1438P924
(ALT)
Packing, Preformed
Quote
(-)
Quote
NOTE:
Prices are provided for planning purposes and are subject to change.
(3)Consumables:
 
Code Number
Description
 
C02-019
Oil, Engine Lubricating (engine oil)
B.Industry Support Information
None.
C.Configuration Chart
NOTE:
For screen assemblies replacement either the old preformed packings or the new preformed packings can be used.
 
New Part Number
Qty/ Eng
Part Name
Old Part Number/ IPC Location
Qty/ Eng
Op Code
Chg/ Sprt Code
 
LR47760E1
(X)
Pump, Lube and Scavenge (SIN 40400)
LR47760E1
(X)
RM
-/-
 
.LR4750701-045, 79-21-10
(1)
Assembly, Screen (SIN LRU SP)
--
(-)
AD
5/-
 
.LR4821101-046, 79-21-10
(1)
Assembly, Screen (SIN LRU SP)
.LR47507
(1)
RE
2/B
 
.LR26393-916
01-050, 79-21-10
(1)
Packing, Preformed
(SIN LRU SP)
.LR26393-916
01-050, 79-21-10
(1)
RM
-/-
 
.J1438P91601-050A, 79-21-10
(ALT)
Packing, Preformed (SIN LRU SP)
--
(-)
AD
5/-
 
.LR4750401-065, 79-21-10
(3)
Assembly, Screen (SIN LRU SP)
--
(-)
AD
5/-
 
.LR4821401-066, 79-21-10
(3)
Assembly, Screen (SIN LRU SP)
.LR47504
(3)
RE
2/B
 
.LR26393-918
01-070, 79-21-10
(3)
Packing, Preformed
(SIN LRU SP)
.LR26393-918
01-070, 79-21-10
(3)
RM
-/-
 
.J1438P91801-070A, 79-21-10
(ALT)
Packing, Preformed
(SIN LRU SP)
--
(-)
AD
5/-
 
.LR4750501-055, 79-21-10
(1)
Assembly, Screen (SIN LRU SP)
--
(-)
AD
5/-
 
.LR4821801-056, 79-21-10
(1)
Assembly, Screen (SIN LRU SP)
.LR47505
(1)
RE
2/B
 
.LR26393-924
01-060, 79-21-10
(1)
Packing, Preformed
(SIN LRU SP)
.LR26393-924
01-060, 79-21-10
(1)
RM
-/-
 
.J1438P92401-060A, 79-21-10
(ALT)
Packing, Preformed
(SIN LRU SP)
--
(-)
AD
5/-
Operation Codes
AD=Add
RE=Replace
RM=Remains
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
Use serviceable old parts for engines that have not changed.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Removal
(1)Remove the five screen assemblies (1, 3, and 5, Figure 1)from the lube unit (01-010, 79-21-10) as follows:
(a)Do not remove the contamination caught in the screen assemblies and on the MCDs when the screen assemblies (1, 3, and 5) are removed.
(b)Put the 1.0 gal (3.8 liter) oil resistant container below the lube unit (01-010).
NOTE:
When the screen assemblies (1, 3, and 5) are removed, make sure that you keep all of the contamination caught in the screen assemblies and on the MCDs.
(c)Remove the screen assemblies (1, 3, and 5) from the lube unit (01-010).
(d)Put the oil drain into the oil resistant container.
(e)Install the protective covers on the open ports of the lube unit (01-010).
(f)Remove and discard the preformed packings (2, 4, and 6) from the lube unit (01-010).
B.Installation
(1)Install the screen assemblies (1, 3, and 5, Figure 1)in the lube unit (01-010, 79-21-10) as follows:
WARNING:
LUBRICATING OILS MAY CAUSE SKIN, EYE, AND RESPIRATORY IRRITATION WITH PROLONGED OR REPEATED CONTACT. UTILIZE PROPER PERSONAL PROTECTIVE EQUIPMENT TO PREVENT SKIN AND EYE CONTACT. IF CONTACT OCCURS, FLUSH AFFECTED AREAS WITH WATER.
CAUTION:
DO NOT DAMAGE THE PREFORMED PACKINGS. OIL LEAKS CAN CAUSE DAMAGE TO THE ENGINE.
(a)Apply a light layer of C02-019 engine oil to the new preformed packings (2, 4, and 6).
(b)Install the new preformed packings (2, 4, and 6) into the groove below the flange of the screen assemblies (1, 3, and 5).
(c)Remove the protective covers from the open ports of the lube unit (01-010).
(d)Install the new screen assemblies (1, 3, and 5) into the lube unit (01-010).
(e)Tighten the new screen assemblies (1, 3, and 5) and torque to 100-120 lb in. (11.3-13.6 N.m).
Removal and Installation of the Screen Assemblies and Preformed Packings
Figure 1   (Sheet 1)
Removal and Installation of the Screen Assemblies and Preformed Packings
Figure 1   (Sheet 2)
Removal and Installation of the Screen Assemblies and Preformed Packings
Figure 1   (Sheet 3)