TASK 72-32-76-300-015 LPC Stage 2.5 Stator - Replace The Abradable Rubber Of The Outer Shroud Ring, Repair-015 (VRS1873)

DMC:V2500-A0-72-32-7600-10A-920A-C|Issue No:004.00|Issue Date:2020-08-01

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 72-32-76-300-015 LPC Stage 2.5 Stator - Replace The Abradable Rubber Of The Outer Shroud Ring, Repair-015 (VRS1873)

Effectivity

FIG/ITEM

PART NO.

01-400

5R0097

01-400

5R0189

Material of component

PART IDENT

SYMBOL

MATERIAL

Ring, shroud outer

Aluminum alloy

Ring, shroud outer

Silicone rubber

General

Price and availability - Refer to IAE

This repair scheme gives the procedure for replacing of abradable rubber.

The practices and processes referred to in the procedure by the TASK number are in the SPM.

NOTE

To identify the consumable materials refer to the PCI.

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Hand ToolsLOCALTools, Hand
KnifeLOCALKnife

Sharp

OvenLOCALOven
Precision weighing scalesLOCALPrecision weighing scales
Hardness tester (Durometer)LOCALHardness tester (Durometer)
IAE 3J12775 Bond test fixture0AM53IAE 3J127751
IAE 3J12785 Inspection stand0AM53IAE 3J127851
IAE 3J13214 Molding support0AM53IAE 3J132141
IAE 3J13155 Filler injector0AM53IAE 3J131551

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-076 METHYL ETHYL KETONELOCALCoMat 01-076
CoMat 02-001 ADHESIVE TAPE (MASKING)LOCALCoMat 02-001
CoMat 02-005 ADHESIVE TAPE (MASKING)LOCALCoMat 02-005
CoMat 02-099 LINT-FREE CLOTHX222XCoMat 02-099
CoMat 02-218 MOLD RELEASE AGENTS18598CoMat 02-218
CoMat 08-032 PRIMERB1571CoMat 08-032
CoMat 08-037 DELETEDX111XCoMat 08-037
CoMat 08-038 SILICONE RUBBER COMPOUNDFAK74CoMat 08-038
CoMat 02-217 MOLD RELEASE AGENTS18598CoMat 02-217

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-76-350-066 Remove the Defective Rubber

      1. Remove the defective rubber.

      1. Use hand tools.

      2. Remove the remaining rubber from the outer shroud, if the remaining rubber is not fully removed in Step.

        1. Apply adhesive tape for masking to the areas which do not require remaining rubber.

        2. Use dry plastic blast to remove the remaining rubber.

        1. Refer to SPM TASK 70-12-07-120-501.

      3. Remove adhesive tape for masking.

    2. SUBTASK 72-32-76-110-062 Clean the Repair Area

    3. SUBTASK 72-32-76-380-058 Apply Primer

      1. CAUTION

        THICK PRIMER WILL CAUSE BOND FAILURE OF SILICONE RUBBER.

        NOTE

        Parts shall have CoMat 08-037 DELETED or CoMat 08-038 SILICONE RUBBER COMPOUND applied within 24 hours of completion of the primer application.

        Apply primer to the bond surface.

      1. Apply a very thin coat of CoMat 08-032 PRIMER with CoMat 02-099 LINT-FREE CLOTH.

      1. Refer to the SPM TASK 70-36-06-360-501.

    4. SUBTASK 72-32-76-360-067 Mixing Instruction

      1. Measure out materials by weight as follows: 10 parts rubber 1 part curing agent.

        1. Use CoMat 08-037 DELETED or CoMat 08-038 SILICONE RUBBER COMPOUND The working life of the mixed silicone rubber is a maximum 6 hours at room temperature.

        1. Refer to the SPM TASK 70-36-06-360-501.

    5. SUBTASK 72-32-76-360-068 Fill with Mixed Silicone Rubber

    1. Refer to Figure.

      2. Apply a light coat of mold release agent to the inner surface of the molding support.

      3. Set the tools to the repair part.

    4. Fill with mixed silicone rubber.

    6. SUBTASK 72-32-76-360-069 Cure the Silicone Rubber Compound

      1. Cure at 290 deg F to 310 deg F (143 deg C to 155 deg C) for one hour with the molding fixture.

      1. Refer to the SPM TASK 70-36-06-360-501.

    2. Remove the component from the molding fixture.

      3. Cure the removed component at 390 deg F to 410 deg F (199 deg C to 210 deg C) for one hour out of the molding fixture.

      1. Refer to the SPM TASK 70-36-06-360-501.

    7. SUBTASK 72-32-76-350-067 Remove Overfilled Silicone Rubber

    1. Refer to Figure.

      2. Remove overfilled silicone rubber.

      1. Use a sharp knife or equivalent.

    8. SUBTASK 72-32-76-220-127 Visually Examine the Repair Area

    1. Refer to Figure.

      2. Visually examine the repaired area.

      1. No cracks are permitted.

      2. No bubbles are permitted.

      3. No foreign inclusions are permitted.

      4. No peelings are permitted.

      5. Refer to Figure.

      6. Refer to the SPM TASK 70-36-06-360-501.

      7. If necessary, do this TASK again.

    9. SUBTASK 72-32-76-220-128 Dimensionally Check the Repaired Area

    1. Refer to Figure.

      2. Dimensionally check the outer shroud ring.

      1. Refer to Figure.

    10. SUBTASK 72-32-76-220-129 Do a Hardness Check on the Repaired Area

    1. Hardness check the repaired area at four positions equally spaced on the circumference. Hardness: ASTM D2240 (Durometer A) 52-65.

    11. SUBTASK 72-32-76-220-130 Do a Bond Test on the Repaired Area

    1. Refer to Figure.

      2. NOTE

        The bond test shall be done after curing (bake) the rubber to the conditions that follow:
        Inspection gas: Air or nitrogen gas.
        Gas pressure: 400 psi (28.1 Kg/sqcm).
        Inspection position: Refer to Figure.
        Vary the pattern as necessary to inspect not fully repaired areas.
        Probe angle: Approximately 45 degrees.
        Holes created by the bond test to be permitted.

        Do a bond test on the repaired area.

        1. Use IAE 3J12775 Bond test fixture 1 off and IAE 3J12785 Inspection stand 1 off. No signs of bulging or air leakage are permitted.

        1. Refer to Figure.

    12. Figure: Silicone Rubber Application Area

    Silicone Rubber Application Area

    Figure: Replacement Of The Abradable Rubber

    Replacement Of The Abradable Rubber

    Figure: Bond Test Of The Abradable Rubber

    Bond Test Of The Abradable Rubber

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial XML tagging correction - non technical change (REA19VC634)

Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:18598
Enterprise Name:MILLER-STEPHENSON CHEMICAL CO
BU Name:MILLER-STEPHENSON CHEMICAL CO
Street:55 BACKUS AVE
City:DANBURY
State:CT
Zip Code:06810
Country:USA
Phone Number:1-203-743-4447
Fax Number:1-203-791-8702
Manufacturer Code:B1571
Enterprise Name:DOW SILICONES BELGIUM SRL
BU Name:DOW SILICONES BELGIUM SRL
Street:RUE JULES BORDET
City:7180 SENEFFE
Country:BELGIUM
Manufacturer Code:FAK74
Enterprise Name:ELKEM SILICONES
BU Name:ELKEM SILICONES
Street:21 AVENUE GEORGES POMPIDOU
City:69486 LYON CEDEX 03
Country:FRANCE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X111X
Enterprise Name:N/A – DELETED CONSUMABLE MATERIAL
Manufacturer Code:X222X
Enterprise Name:N/A – REFER TO APPLICABLE COMAT SUFFIX
Manufacturer Code:LOCAL
Supply Number:CoMat 01-076
Type:sp01
Supply Short Name:CoMat 01-076 METHYL ETHYL KETONE
Supply Name:CoMat 01-076 METHYL ETHYL KETONE
Specification Groups:
Doc NumberType
METHYL ETHYL KETONE, TECHNICAL GRADE, CERTIFIED TO BSI BS 1940 OR ASTM D740, OR TT-M-261
Suppliers:
ManufacturerRemarks
LOCAL
Manufacturer Code:LOCAL
Supply Number:CoMat 02-001
Type:sp01
Supply Short Name:CoMat 02-001 ADHESIVE TAPE (MASKING)
Supply Name:CoMat 02-001 ADHESIVE TAPE (MASKING)
Specification Groups:
Doc NumberType
OMAT: 230 (RR REF)ZINC OXIDE AT142
JCR-197 (JAEC REF)ZINC OXIDE AT142
Suppliers:
ManufacturerRemarks
LOCAL
K6835
U0415
Manufacturer Code:LOCAL
Supply Number:CoMat 02-005
Type:sp01
Supply Short Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Supply Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Specification Groups:
Doc NumberType
OMAT: 2/94 (RR REF)AT 7 BLACK, WATERPROOF
Suppliers:
ManufacturerRemarks
LOCAL
U0415
K6835
Manufacturer Code:X222X
Supply Number:CoMat 02-099
Type:sp01
Supply Short Name:CoMat 02-099 LINT-FREE CLOTH
Supply Name:CoMat 02-099 LINT-FREE CLOTH
Specification Groups:
Doc NumberType
WHERE COMAT 02-099 IS SPECIFIED WITH NO SUFFIX, USE COMAT 02-099A OR COMAT 02-099B.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:18598
Supply Number:CoMat 02-217
Type:sp01
Supply Short Name:CoMat 02-217 MOLD RELEASE AGENTS
Supply Name:CoMat 02-217 MOLD RELEASE AGENTS
Specification Groups:
Doc NumberType
JS-3027-1 (JAEC REF)MS-122A or MS 122AD or MS-122DF or MS- 122N/CO2
Suppliers:
ManufacturerRemarks
18598
Manufacturer Code:18598
Supply Number:CoMat 02-218
Type:sp01
Supply Short Name:CoMat 02-218 MOLD RELEASE AGENTS
Supply Name:CoMat 02-218 MOLD RELEASE AGENTS
Specification Groups:
Doc NumberType
JS-3027-2 (JAEC REF)MS-143
Suppliers:
ManufacturerRemarks
18598
Manufacturer Code:X222X
Supply Number:CoMat 08-032
Type:sp01
Supply Short Name:CoMat 08-032 PRIMER
Supply Name:CoMat 08-032 PRIMER
Specification Groups:
Doc NumberType
DELETED. USE ONE OF THE COMAT 08-032 LETTER SUFFIX ALTERNATIVE MATERIALS.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:X111X
Supply Number:CoMat 08-037
Type:sp01
Supply Short Name:CoMat 08-037 DELETED
Supply Name:CoMat 08-037 DELETED
Specification Groups:
Doc NumberType
DELETED
Suppliers:
ManufacturerRemarks
X111X
Manufacturer Code:FAK74
Supply Number:CoMat 08-038
Type:sp01
Supply Short Name:CoMat 08-038 SILICONE RUBBER COMPOUND
Supply Name:CoMat 08-038 SILICONE RUBBER COMPOUND
Specification Groups:
Doc NumberType
JCR-106 (JAEC REF)BLUESIL V-622
JS-3024 (JAEC REF)
Suppliers:
ManufacturerRemarks
FAK74
Manufacturer Code:LOCAL
Tool Number:Hardness tester (Durometer)
Tool Name:Hardness tester (Durometer)
Manufacturer Code:0AM53
Tool Number:IAE 3J12775
Tool Name:IAE 3J12775 Bond test fixture
Manufacturer Code:0AM53
Tool Number:IAE 3J12785
Tool Name:IAE 3J12785 Inspection stand
Manufacturer Code:0AM53
Tool Number:IAE 3J13155
Tool Name:IAE 3J13155 Filler injector
Manufacturer Code:0AM53
Tool Number:IAE 3J13214
Tool Name:IAE 3J13214 Molding support
Manufacturer Code:LOCAL
Tool Number:Knife
Tool Name:Knife
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Manufacturer Code:LOCAL
Tool Number:Precision weighing scales
Tool Name:Precision weighing scales
Manufacturer Code:LOCAL
Tool Number:Tools, Hand
Tool Name:Hand Tools