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 72-42-20-300-002 No. 4 Bearing Compartment Cooling Air Tube - Replace The Tube Heatshield, Repair-002 (VRS3022)
General
Price and availability - refer to IAE.
The practices and processes referred to in the procedure by the TASK number are in the SPM.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Air hammers | LOCAL | Air hammer | ||
| Anvil | LOCAL | Anvil | ||
| Mallet | LOCAL | Mallet | ||
| Silicon carbide rag wheel | LOCAL | Silicon carbide rag wheel | ||
| Vibrating marking pencil | LOCAL | Vibrating marking pencil |
Consumables, Materials and Expendables
NONESpares
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| HEATSHIELD - NO. 4 BEARING TUBE | 0AM53 | 2A3136 | ||
| WIRE, THRUST | U1653 | AS15782 |
Safety Requirements
NONEProcedure
Refer to Figure.
Remove the tube coupling nut and thrust wire. Discard the thrust wire.
SUBTASK 72-42-20-350-056 Remove the Tube Coupling Nut and Thrust Wire from the No.4 Bearing Cooling Tube
Refer to Figure.
Grind the weld which holds the heatshield to the tube. Remove and discard the heatshield.
Grind the remaining weld from the tube until the weld is flush with the base metal of the tube.
SUBTASK 72-42-20-350-057 Remove the No.4 Bearing Heatshield
Use a Silicon carbide rag wheel or equivalent.
Clean the repair area.
SUBTASK 72-42-20-120-051 Clean the Repair Area
Refer to SPM TASK 70-23-03-230-501 or SPM TASK 70-23-08-230-501.
Fluorescent penetrant inspect the repair area.
SUBTASK 72-42-20-230-072 Examine the Repair Area
Refer to Figure. Use the manual gas tungsten arc method.
Refer to SPM TASK 70-31-13-310-501.
NOTE
The fusion weld location can vary + 0.060in. (1.524 mm).
Weld the new 2A3136 HEATSHIELD - NO. 4 BEARING TUBE to the tube.
SUBTASK 72-42-20-310-051 Weld the New No.4 Bearing Heatshield to the No.4 Bearing Cooling Tube
Refer to SPM TASK 70-37-01-370-501.
Stress-relieve the tube.
SUBTASK 72-42-20-370-051 Stress-Relieve the No.4 Bearing Cooling Tube
Use a Silicon carbide rag wheel or equivalent.
Blend the surface of the weld to remove scratches, grind marks or discontinuities.
SUBTASK 72-42-20-350-058 Blend the Repair Area
Refer to Figure.
Position the wire in the hole in the nut. Use a Mallet or an Air hammers and an Anvil to move the thrust wire into position.
Install the coupling nut with the new AS15782 WIRE, THRUST.
SUBTASK 72-42-20-350-059 Install the Tube Coupling Nut and Thrust Wire to the No.4 Bearing Cooling Tube
Refer to Inspection-000 TASK 72-42-20-100-100.
Examine the tube after repair.
SUBTASK 72-42-20-220-116 Examine the Repair
Make a permanent mark by the procedure given in SPM TASK 70-09-00-400-501.
Use a Vibrating marking pencil. Remove high metal caused by marking the number.
Make a mark VRS3022 on the repaired No.4 bearing cooling tube adjacent to part number .
SUBTASK 72-42-20-350-060 Identify the Repair
Figure: Remove the No.4 Bearing Heatshield from the No.4 Bearing Cooling Tube
Remove the No.4 Bearing Heatshield from the No.4 Bearing Cooling Tube
Figure: Install the No.4 Bearing Heatshield to the No.4 Bearing Cooling Tube
Install the No.4 Bearing Heatshield to the No.4 Bearing Cooling Tube
