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 75-24-49-300-005 LPT ACC Cooling Air Ducts - Weld Repair, Repair-005 (VRS4247)
Material of component
DESCRIPTION | IAE SYMBOL | MATERIAL |
Upper air cooling duct assembly | TiCu6-4 | |
Lower air cooling duct assembly | TiCu6-4 |
General
Price and availability - none.
The practices and processes referred to in the procedure by the TASK number are in the SPM.
NOTE
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Crack detection kit (fluorescent) | LOCAL | Crack detection kit (fluorescent) | ||
| Vacuum furnace | LOCAL | Vacuum furnace | 2400 deg F (1315 deg C) - bottom loading | |
| Tungsten inert gas system (TIG) | LOCAL | Tungsten inert gas system (TIG) | ||
| Unltraviolet lamp | LOCAL | Ultraviolet lamp |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 03-246 WELDING MATERIAL | LOCAL | CoMat 03-246 | ||
| CoMat 03-247 WELDING MATERIAL | LOCAL | CoMat 03-247 |
Spares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Refer to SPM TASK 70-31-13-310-501.
Keep accurately to the cleaning policy as described, to avoid damage to the titanium.
Clean the areas around the cracks on the two sides of the upper and lower air cooling duct assemblies.
Clean the areas around the cracks or the wear area.
SUBTASK 75-24-49-110-057 Clean the Upper and Lower Air Cooling Duct Assemblies
Refer to Figure.
Refer to SPM TASK 70-31-13-310-501.
Use protective gas equipment for purity of welds.
Use CoMat 03-246 WELDING MATERIAL to repair cracks on tubes.
Use CoMat 03-247 WELDING MATERIAL to repair cracks on housing.
Use CoMat 03-246 WELDING MATERIAL to repair cracks in joints between housing and tubes.
Tungsten inert gas weld the cracks on the two sides of the upper and lower air cooling duct assemblies.
Refer to SPM TASK 70-31-13-310-501.
Use protective gas equipment for purity of welds.
Use CoMat 03-246 WELDING MATERIAL to repair wear on tubes.
Use CoMat 03-247 WELDING MATERIAL to repair wear on housing.
Tungsten inert gas build-up weld the upper and lower air cooling duct assemblies.
SUBTASK 75-24-49-350-067 Weld Repair the Upper and Lower Air Cooling Duct Assemblies
Refer to SPM TASK 70-23-05-230-501.
No cracks are permitted.
Do the test for cracks.
SUBTASK 75-24-49-230-060 Examine the Welded Areas for Cracks
Use files or hand held stones.
No raised material is permitted on repaired surface.
Dress welds smooth on repaired surfaces.
SUBTASK 75-24-49-350-068 Dress the Welded Areas
Refer to Figure.
Use Vacuum furnace bottom loading for 2 hours at 887 deg F (475 deg C).
Argon or vacuum atmosphere is acceptable.
Heat treat the upper and lower air cooling duct assemblies.
SUBTASK 75-24-49-350-069 Heat Treat the Upper and Lower Air Cooling Duct Assemblies
Refer to SPM TASK 70-23-05-230-501.
No cracks are permitted.
Do the test for cracks.
SUBTASK 75-24-49-230-061 Do the Post Repair Inspection
Figure: Weld Repair of the Upper and Lower Air Cooling Duct Assemblies
Weld Repair of the Upper and Lower Air Cooling Duct Assemblies
