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 75-24-49-300-007 LPT ACC Connector Air Tube - Weld Repair, Repair-007 (VRS4251)
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 |
|---|---|---|---|---|
| Hand held stones | LOCAL | Hand held stones | ||
| Tungsten inert gas system (TIG) | LOCAL | Tungsten inert gas system (TIG) |
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.
Dirty surfaces cause a decrease in weld strength.
Clean the areas around the cracks on two sides, if possible.
SUBTASK 75-24-49-110-061 Clean the Tube Connector
Refer to Figure and SPM TASK 70-31-13-310-501.
For purity of welds, weld in a protective gas environment.
Use CoMat 03-246 WELDING MATERIAL to repair cracks on tubes and CoMat 03-247 WELDING MATERIAL on housing.
To repair cracks in joints between housing and tubes, use CoMat 03-246 WELDING MATERIAL.
Weld up cracks, use tungsten inert gas method.
SUBTASK 75-24-49-350-083 Weld Up Repair Tube Connector
NOTE
Do the welding of titanium in a protective gas atmosphere to avoid impurities in weld seams, leading to premature cracking and reduction in fatigue strength.Refer to SPM TASK 70-31-13-310-501 for acceptance standards.
Examine the weld quality.
SUBTASK 75-24-49-220-090 Examine the Welds
Refer to SPM TASK 70-23-05-230-501.
No cracks are permitted.
Do the test for cracks.
SUBTASK 75-24-49-230-070 Examine the Local Repaired Areas of Cracks
Refer to SPM TASK 70-11-06-300-503 or SPM TASK 70-11-26-300-503.
Clean the tube.
SUBTASK 75-24-49-110-062 Clean the Tube Connector
Use files or Hand held stones.
No increased material is permitted on the touch surfaces.
Dress the welds, which are too much to the initial contour.
SUBTASK 75-24-49-350-084 Dress the Welded Areas
CAUTION
DO NOT OVERHEAT THE AREAS WHICH ARE DRESSED.Put the part in an oven for two hours at 887 deg F (475 deg C).
Use argon or vacuum.
Heat treat the tube connector.
SUBTASK 75-24-49-370-052 Heat Treatment after the Repair
Refer to SPM TASK 70-23-05-230-501.
No cracks are permitted.
Do a test for cracks.
SUBTASK 75-24-49-230-071 Examine the Repaired Area for Cracks
Refer to SPM TASK 70-11-06-300-503 or SPM TASK 70-11-26-300-503.
Clean the tube.
SUBTASK 75-24-49-110-063 Clean the Tube Connector
Figure: Tube connector - Weld up cracks
Tube connector - Weld up cracks
