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 75-00-49-300-003 Engine Stage 7 Air Off-Take Air Ducts - Blend Repair Surface Damage, Repair-003 (VRS6118)
Material of component
DESCRIPTION | SYMBOL | MATERIAL |
HP compressor stage 7 BV and cabin air duct | TDN | Titanium Aluminum Vanadium alloy |
General
Price and availability - none
This TASK gives the procedure to repair the HP compressor stage 7 BV and cabin air duct by dressing.
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 |
|---|---|---|---|---|
| Penetrant Crack Test Equipment | 0AM53 | Penetrant Crack Test Equipment |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 05-106 ABRASIVE STONE | K6835 | CoMat 05-106 | ||
| CoMat 05-020 WATERPROOF SILICON CARBIDE | LOCAL | CoMat 05-020 | ||
| CoMat 05-021 WATERPROOF SILICON CARBIDE | 44197 | CoMat 05-021 |
Spares
NONESafety Requirements
NONEProcedure
Refer to Figure.
Use CoMat 05-106 ABRASIVE STONE and CoMat 05-021 WATERPROOF SILICON CARBIDE. The maximum depth to remove the damage must not be more than 0.005 in. (0.13 mm).
Remove the damage
Make sure the area is made smooth into the adjacent material. The diameter of the repaired area to be 50 times the depth. Remove all the sharp edges and sudden changes of the slope.
Make the damaged area smooth
Use CoMat 05-020 WATERPROOF SILICON CARBIDE. Polish the repaired area and the area made smooth. Make sure all the scratches are removed and the surface finish is the same as the adjacent material.
Polish the area
SUBTASK 75-00-49-350-052 Remove the Damage
CAUTION
TITANIUM COMPONENTYOU MUST USE SILICON CARBIDE TYPE STONES AND ABRASIVE PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.DO NOT USE FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.IF THE MATERIAL SHOWS A CHANGE IN COLOR TO DARKER THAN A LIGHT STRAW COLOR, THE COMPONENT IS TO BE REJECTED.Refer to Figure.
Make sure all the repaired areas have an equivalent surface finish as the adjacent material. Make sure the maximum depth of the repaired area is not more than 0.005 in. (0.13 mm), the diameter must not be more than 0.250 in. (6.35 mm).
Do a visual and dimensional inspection
SUBTASK 75-00-49-220-060 Examine the Repair
Refer to the SPM TASK 70-23-01-230-501.
No cracks are permitted.
Do a penetrant crack test on the repaired area
SUBTASK 75-00-49-230-056-001 Do a Crack Test
Refer to the SPM TASK 70-23-03-230-501.
No cracks are permitted.
Do a penetrant crack test on the repaired area
SUBTASK 75-00-49-230-056-002 Do a Crack Test
Figure: An Example Of An Area To Be Repaired
An Example Of An Area To Be Repaired
