Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
All
Common Information
TASK 72-40-00-300-006 No. 4 Bearing/HPT Nut - Replace Nut Silver Plate And Treat With Anti-Galling Compound, Repair-006 (VRS3011)
General
If you did the procedure in Rework 001, TASK 72-40-00-840-001 (REWORK-001) to get PN 2A2247, you do not have to remove the eight plugs (PN 2A2248) to do this repair.
This repair must only be done when the instruction to do so is given in 72-40-00-200-000 (INSPECTION/CHECK-000).
The practices and processes referred to in the procedure by TASK number are in the SPM.
Price and availability - none
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 10-130 ANTIGALLING COMPOUND | 8F024 | CoMat 10-130 |
Spares
NONESafety Requirements
NONEProcedure
Refer to the SPM TASK 70-33-16-300-503.
Remove the silver plate.
SUBTASK 72-40-00-330-055 Remove the Silver Plate from the Bearing Retaining Nut
NOTE
If SB 72-0095 was incorporated in the field, then PN 2A2247 will have 16 holes with eight metering plugs. Remove the metering plugs before the removal of the silver plate. Procured PN 2A2247 will have only eight holes and no metering plugs.Refer to Figure and SPM TASK 70-38-24-300-503.
Mask the areas that are not to be plated.
SUBTASK 72-40-00-350-062 Mask the Areas that are not to be Plated
Refer to the SPM TASK 70-33-16-300-503.
Apply silver plate between 0.0003 and 0.0006 in. (0.008 and 0.015 mm) in thickness.
Apply silver plate to the retaining nut.
SUBTASK 72-40-00-330-056 Apply Silver Plate to the Areas of the Bearing Retaining Nut
Refer to Figure.
Examine the retaining nut after the silver plate has been applied. Complete plating coverage is required on all threads.
SUBTASK 72-40-00-220-118 Examine the Bearing Retaining Nut
Refer to the SPM TASK 70-38-39-380-501.
Apply CoMat 10-130 ANTIGALLING COMPOUND to the retaining nut after you apply silver plate.
SUBTASK 72-40-00-380-054 Apply Antigalling Compound to the Areas of the Bearing Retaining Nut
NOTE
If SB 72-0095 was incorporated in the field, then re-install the metering plugs. Do not plug the holes with antigalling compound.Make a permanent mark by TASK 70-09-00-400-501.
Refer to Figure for the only permitted location of electrical contact.
Use the vibro-peen method to make a mark VRS3011 adjacent to the part number.
SUBTASK 72-40-00-350-063 Identify the Repair
Figure: Repair Details and Dimensions (For PN 2A0145 and 2A2247 Only)
Repair Details and Dimensions (For PN 2A0145 and 2A2247 Only)
Figure: Repair Details and Dimensions (Typical for All Part Numbers)
Repair Details and Dimensions (Typical for All Part Numbers)
Figure: Repair Details and Dimensions (For PN 2A2245 Only)
Repair Details and Dimensions (For PN 2A2245 Only)
