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 72-41-21-300-092 HPC Stage 8 Rotor Path Ring - Replace The Lining, Repair-092 (VRS6663)
Effectivity
FIG/ITEM | PART NO | ASSEMBLY |
|---|---|---|
03-500 | 6A7578 | C |
03-500 | 6A7624 | C |
03-500 | 6B1432 | C |
03-600 | 6A7625 | B |
03-600 | 6A7627 | A |
Material of component
PART IDENT | MATERIAL |
HP compressor stage 8 rotor path ring | Corrosion resistant steel |
General
This is a source demonstrated repair that can only be accomplished by IAE approved vendors.
The vendor is self-provisioning for the coating material.
Price and Availability
Refer to International Aero Engines
Related Repairs
Repair the HP Compressor Stage 8 Rotor Path Ring Surface Protection by Replacement, refer to VRS6146, TASK 72-41-21-300-059 (REPAIR-059)
Repair the HP Compressor Stage 7 Case Assembly Surface Protection by Replacement, refer to VRS6163, TASK 72-41-21-300-006 (REPAIR-006)
Repair the HP Compressor Stage 6 Rotor Path Ring - Replace the Lining, refer to VRS6670, TASK 72-41-31-300-031 (REPAIR-031)
Repair the HP Compressor Stage 7 Rotor Path Ring - Replace the Lining, refer to VRS6671, TASK 72-41-21-300-091 (REPAIR-091)
NOTE
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| Abrasive Blast Equipment | LOCAL | Abrasive Blast Equipment | ||
| Air grinder | LOCAL | Air grinder | ||
| Chemical cleaning equipment | LOCAL | Chemical cleaning equipment | ||
| Chemical cleaning equipment | LOCAL | Chemical cleaning equipment | ||
| Hardness Tester | LOCAL | Hardness Tester | ||
| Lathe | LOCAL | Lathe | ||
| Metal spray equipment | LOCAL | Metal spray equipment | ||
| Penetrant Crack Test Equipment | LOCAL | Penetrant crack test equipment | ||
| Bottle | LOCAL | Bottle | Polythene | |
| Rotary burr | LOCAL | Rotary burr | ||
| Standard Workshop Equipment | LOCAL | Standard Workshop Equipment | ||
| Water-jet machine | LOCAL | Water-jet machine | Ultra high pressure | |
| Vibrating Marking Pencil | LOCAL | Vibrating Marking Pencil | ||
| Workshop inspection equipment | LOCAL | Workshop inspection equipment | ||
| IAE 3R18232 Lifting beam | 0AM53 | IAE 3R18232 | ||
| IAE 3R18570 Turning fixture | 0AM53 | IAE 3R18570 | Assembly A | |
| IAE 3R19081 Turning fixture | 0AM53 | IAE 3R19081 | Assembly B |
Consumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE | LOCAL | CoMat 01-025 | ||
| CoMat 01-041 ALKALINE RUST REMOVER | LOCAL | CoMat 01-041 | ||
| CoMat 02-198 ADHESIVE TAPE (MASKING METAL SPRAY) | 07512 | CoMat 02-198 | ||
| CoMat 03-036 METAL SPRAYING WIRE, Ni,Al | LOCAL | CoMat 03-036 | ||
| CoMat 03-038 METAL SPRAYING POWDER NICKEL ALUMINIUM (95/5) | 00BB6 | CoMat 03-038 | ||
| CoMat 03-057 ALUMINIUM ALLOY/POLYESTERCOMPOSITE | LOCAL | CoMat 03-057 | ||
| CoMat 03-089 METAL SPRAYING POWDER Ni/Al (95/5) | 33870 | CoMat 03-089 | ||
| CoMat 03-090 METAL SPRAYING POWDER Ni/Al (95/5) | X111X | CoMat 03-090 | ||
| CoMat 03-457 METAL SPRAY POWDER | 39918 | CoMat 03-457 | ||
| CoMat 05-001 ABRASIVE MEDIUM, ALUMINIUM OXIDE, 20/30 GRADE | LOCAL | CoMat 05-001 | ||
| CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY) | X222X | CoMat 06-063 |
Spares
NONESafety Requirements
NONEProcedure
The source demonstration requirements of this repair means that the facility not authorised to accomplish this repair either utilise the Authorised Repair Vendors listed below, or contact the IAE Repair Services Group to determine if a qualification program can be initiated at their facility.
IAE International Aero Engines AG
400 Main Street
M/S 121-10
East Hartford CT 06118
U.S.A.
Attn: Manager Technical Services
Authorised Repair Vendors for repair VRS6663 are listed below:
ROLLS-ROYCE AERO REPAIR AND OVERHAUL
East Kilbride
Glasgow
G74 4PY
SCOTLAND
MTU MAINTENANCE ZHUHAI
1 Tianke Road
Free Trade Zone
Zhuhai, Guangdong
519030
P.R. CHINA
MTU MAINTENANCE HANNOVER Gmbh
Muenchner Str.31
30855 Langenhagan
GERMANY
IHI CORPORATION
229 Tonogaya Mizuho-Machi
Nishitama-Gun
Tokyo 190-12
JAPAN
LUFTHANSA TECHNIK AG
HAM WR 420
PO Box 63 03 00
D-22313 Hamburg-Airport
GERMANY
PRATT AND WHITNEY COLUMBUS ENGINE CENTER
8801 Macon Road
M/S 906-05
Columbus
GA31908
USA
PRATT AND WHITNEY AIR NEW ZEALAND SERVICES
PO Box 14005
634 Memorial Avenue
Christchurch International Airport
Christchurch 8053
NEW ZEALAND
Rolls-Royce Inchinnan
Inchinnan Drive
Inchinnan Business Park
Inchinnan, PA4 9AF
Scotland
Asian Compressor Technology Services Co., Ltd.
1, Industrial 3rd Rd., Kuanyin Industrial Park, Kuanyin Dist.,
Taoyuan City
Taiwan 32853
MTU Aero Engines AG
Dachauer Strasse 665
80995 Muenchen
Germany
The designation by IAE of an Authorised Repair Vendor indicates that the Repair Vendor has demonstrated the necessary capability to enable it to carry out the listed repair work. However, IAE makes no warranties or representations concerning the qualifications or quality standards of the Repair Vendors to carry out the repair work and accepts no responsibility whatsoever for the work that may be carried out by a Repair Vendor other than when IAE is listed as the Repair Vendor. Authorised Repair Vendors do not act as agents or representatives of IAE.
Repair Facilities
Refer to TASK 72-41-21-100-000 (CLEANING-000).
Use chemical cleaning equipment.
Chemically clean.
SUBTASK 72-41-21-110-210 Chemically Clean
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-003.
Use CoMat 01-041 ALKALINE RUST REMOVER with chemical cleaning equipment.
Chemically remove the abradable lining.
SUBTASK 72-41-21-330-060-A01 Chemically Remove the Abradable Lining, Assembly A
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-002.
Use CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE with chemical cleaning equipment.
Put the assembly into the nitric acid and keep below the surface.
Stripping is complete when gassing stops.
Remove assembly from the acid immediately after gassing stops.
Chemically remove the bond coat.
SUBTASK 72-41-21-330-061-A01 Chemically Remove the Bond Coat, Assembly A
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-003.
Use CoMat 01-041 ALKALINE RUST REMOVER with chemical cleaning equipment.
Chemically remove the abradable lining.
SUBTASK 72-41-21-330-060-B01 Chemically Remove the Abradable Lining, Assembly B
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-002.
Use CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE with chemical cleaning equipment.
Put the assembly into the nitric acid and keep below the surface.
Stripping is complete when gassing stops.
Remove assembly from the acid immediately after gassing stops.
Chemically remove the bond coat.
SUBTASK 72-41-21-330-061-B01 Chemically Remove the Bond Coat, Assembly B
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-003.
Use CoMat 01-041 ALKALINE RUST REMOVER with chemical cleaning equipment.
Chemically remove the abradable lining.
SUBTASK 72-41-21-330-060-C01 Chemically Remove the Abradable Lining, Assembly C
Refer to Figure.
Refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-002.
Use CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE with chemical cleaning equipment.
Put the assembly into the nitric acid and keep below the surface.
Stripping is complete when gassing stops.
Remove assembly from the acid immediately after gassing stops.
Chemically remove the bond coat.
SUBTASK 72-41-21-330-061-C01 Chemically Remove the Bond Coat, Assembly C
Refer to Figure.
Use IAE 3R18232 Lifting beam 1 off and IAE 3R18570 Turning fixture 1 off with a lathe.
Set to turn correctly.
Use a dial test indicator.
Assemble the fixture on the machine.
SUBTASK 72-41-21-320-001-A02 Machine the Abradable Lining, Assembly A
Refer to Figure.
SUBTASK 72-41-21-320-002-A02 Grind the Remaining Lining Material, Assembly A
Refer to Figure.
Use IAE 3R18232 Lifting beam1 off and IAE 3R19081 Turning fixture 1 off with a lathe.
Set to turn correctly.
Use a dial test indicator.
Assemble the fixture on the machine.
SUBTASK 72-41-21-320-001-B02 Machine the Abradable Lining, Assembly B
Refer to Figure.
SUBTASK 72-41-21-320-002-B02 Grind the Remaining Lining Material, Assembly B
Refer to Figure.
SUBTASK 72-41-21-320-001-C02 Machine the Abradable Lining, Assembly C
Refer to Figure.
SUBTASK 72-41-21-320-002-C02 Grind the Remaining Lining Material, Assembly C
Refer to Figure.
Refer to the SPM TASK 70-15-01-160-501.
Use an ultra high pressure water-jet machine.
Make sure that the abradable lining and old bond coat are removed.
Remove the abradable lining.
SUBTASK 72-41-21-330-064-A03 Remove the Abradable Lining by Ultra High Pressure Water-Jet, Assembly A
Refer to Figure.
Refer to the SPM TASK 70-12-02-120-501.
Use CoMat 05-001 ABRASIVE MEDIUM, ALUMINIUM OXIDE, 20/30 GRADE with abrasive blast equipment.
Make sure the old bond coat and abradable lining have been removed.
Abrasive blast to remove the bond coat that remains.
SUBTASK 72-41-21-120-089-A03 Abrasive Blast to Remove the Remaining Bond Coat, Assembly A
Refer to Figure.
Refer to the SPM TASK 70-15-01-160-501.
Use an ultra high pressure water-jet machine.
Make sure that the abradable lining and old bond coat are removed.
Remove the abradable lining.
SUBTASK 72-41-21-330-064-B03 Remove the Abradable Lining by Ultra High Pressure Water-Jet, Assembly B
Refer to Figure.
Refer to the SPM TASK 70-12-02-120-501.
Use CoMat 05-001 ABRASIVE MEDIUM, ALUMINIUM OXIDE, 20/30 GRADE with abrasive blast equipment.
Make sure the old bond coat and abradable lining have been removed.
Abrasive blast to remove the bond coat that remains.
SUBTASK 72-41-21-120-089-B03 Abrasive Blast to Remove the Remaining Bond Coat, Assembly B
Refer to Figure.
Refer to the SPM TASK 70-15-01-160-501.
Use an ultra high pressure water-jet machine.
Make sure that the abradable lining and old bond coat are removed.
Remove the abradable lining.
SUBTASK 72-41-21-330-064-C03 Remove the Abradable Lining by Ultra High Pressure Water-Jet, Assembly C
Refer to Figure.
Refer to the SPM TASK 70-12-02-120-501.
Use CoMat 05-001 ABRASIVE MEDIUM, ALUMINIUM OXIDE, 20/30 GRADE with abrasive blast equipment.
Make sure the old bond coat and abradable lining have been removed.
Abrasive blast to remove the bond coat that remains.
SUBTASK 72-41-21-120-089-C03 Abrasive Blast to Remove the Remaining Bond Coat, Assembly C
Refer to the SPM TASK 70-11-39-300-503, SUBTASK 70-11-39-300-001.
Use a polythene bottle.
Swab etch the repair area(s).
SUBTASK 72-41-21-110-211 Cold Ferric Chloride Etch
Refer to the SPM TASK 70-23-05-230-501.
Use CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY) with penetrant crack test equipment.
Cracks are not allowed.
Do a local penetrant crack test on the repair area(s).
SUBTASK 72-41-21-230-237 Do a Local Crack Test
Refer to the SPM TASK 70-11-01-300-503.
Use chemical cleaning equipment.
Chemically Clean.
SUBTASK 72-41-21-110-212 Clean the Stage 8 Rotor Path Ring
For Assembly A and Assembly B refer to VRS6146, TASK 72-41-21-300-059 (REPAIR-059).
For Assembly C refer to VRS6163, TASK 72-41-21-300-006 (REPAIR-006).
Apply the surface protection as necessary.
SUBTASK 72-41-21-380-135 Apply the Surface Protection
NOTE
The adhesive tape permits the blasting and the sprayed coating to be done in one operation.Use CoMat 02-198 ADHESIVE TAPE (MASKING METAL SPRAY) or locally made fixture.
Seal the areas not to be sprayed.
SUBTASK 72-41-21-350-221 Seal the Areas Not to be Sprayed, Assembly A, Assembly B and Assembly C
Refer to the SPM TASK 70-12-02-120-501.
Use CoMat 05-001 ABRASIVE MEDIUM, ALUMINIUM OXIDE, 20/30 GRADE with abrasive blast equipment.
Abrasive blast.
SUBTASK 72-41-21-120-090 Abrasive Blast the Areas to be Sprayed, Assembly A, Assembly B and Assembly C

CAUTION
TO PREVENT CONTAMINATION, DO NOT TOUCH THE SURFACE, WHICH IS CLEANED FOR REPAIR.
CAUTION
DO NOT DWELL IN ANY ONE AREA, USE CONTINUOUS MOTION. EXTENDED DURATION OF ABRASIVE BLASTING CAN CAUSE DETERIORATION OF THE PREPARED SURFACE CONDITION AND MUST BE PREVENTED.Refer to the SPM TASK 70-11-01-300-503.
Use chemical cleaning equipment.
Chemically clean.
SUBTASK 72-41-21-110-213 Clean the Stage 8 Rotor Path Ring
Refer to the SPM TASK 70-34-01-340-501, SUBTASK 70-34-01-340-025 or SUBTASK 70-34-01-340-010.
For powder feed plasma spray gun, use CoMat 03-038 METAL SPRAYING POWDER NICKEL ALUMINIUM (95/5), CoMat 03-089 METAL SPRAYING POWDER Ni/Al (95/5) or CoMat 03-090 METAL SPRAYING POWDER Ni/Al (95/5).
Alternatively for the wire feed combustion spraying, use CoMat 03-036 METAL SPRAYING WIRE, Ni,Al.
Pre heat the seal ring to 221 deg F to 257 deg F (105 deg C to 125 deg C).
Apply a thickness of 0.003 in. to 0.005 in. (0.08 mm to 0.13 mm).
Use metal spray equipment.
Apply bond coat to a test piece.
Apply the bond coat.
Refer to the SPM TASK 70-34-01-340-501.
Use CoMat 03-457 METAL SPRAY POWDER with metal spray equipment.
Spray sufficient thickness to allow for machining.
Apply abradable lining to a test piece to check the spray hardness.
Apply the abradable lining.
SUBTASK 72-41-21-340-063 Apply the Abradable Lining to the Repaired Part and Test Piece, Assembly A, Assembly B and Assembly C
Refer to the SPM TASK 70-34-01-340-501.
Visually examine the sprayed coating on the ring.
Refer to the SPM TASK 70-34-01-340-501, SUBTASK 70-34-01-340-004.
Use hardness testing equipment.
Average hardness must be 45 to 70 R15Y, outer limits 35 minimum, 80 maximum.
If the hardness value is outside these limits, reject the assembly and do the repair again.
Hardness test the sprayed coating on the test piece.
SUBTASK 72-41-21-220-645 Examine the Stage 8 Rotor Path Lining, Assembly A, Assembly B and Assembly C
Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.
Use vibro engraving equipment.
Make a mark VRS6663 adjacent to the part number.
SUBTASK 72-41-21-350-223 Identify the Repair
Figure: Repair Details and Dimensions - Assembly A
Repair Details and Dimensions - Assembly A

Figure: Repair Details and Dimensions - Assembly B
Repair Details and Dimensions - Assembly B

Figure: Repair Details and Dimensions - Assembly C
Repair Details and Dimensions - Assembly C

Figure: Repair Details and Dimensions - Assembly A
Repair Details and Dimensions - Assembly A

Figure: Repair Details and Dimensions - Assembly B
Repair Details and Dimensions - Assembly B

Figure: Repair Details and Dimensions - Assembly C
Repair Details and Dimensions - Assembly C

