TASK 72-32-72-300-009 LPC Bleed Valve Ring - Restore The Teflon Coating, Repair-009 (VRS1748)

DMC:V2500-A0-72-32-7200-00A-609A-C|Issue No:003.00|Issue Date:2020-05-01

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 72-32-72-300-009 LPC Bleed Valve Ring - Restore The Teflon Coating, Repair-009 (VRS1748)

Effectivity

FIG/ITEM PART NO.

02-100

5A1450

02-100

5A1686

02-100

5A1872

02-100

5A2225

Material of component

PART IDENT

SYMBOL

MATERIAL

Valve ring assembly

Aluminum alloy

General

Price and availability - none

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

For the method to clean the parts, refer to TASK 72-32-72-100-000.

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-339 ALKALI CLEANER (GENERAL PURPOSE)LOCALCoMat 01-339
CoMat 01-410 ISOPROPYL ALCOHOL, REAGENT GRADE0AL61CoMat 01-410
CoMat 01-555 ALKALINE CLEANERSCW17CoMat 01-555
CoMat 01-556 REMOVERSCW17CoMat 01-556
CoMat 02-001 ADHESIVE TAPE (MASKING)LOCALCoMat 02-001
CoMat 02-006 ADHESIVE TAPE ALUMINIUM FOILK6835CoMat 02-006
CoMat 02-051 HIGH TEMPERATURE GLASS CLOTH TAPEX111XCoMat 02-051
CoMat 02-099 LINT-FREE CLOTHX222XCoMat 02-099
CoMat 02-198 ADHESIVE TAPE (MASKING METAL SPRAY)07512CoMat 02-198
CoMat 05-022 ALUMINUM OXIDE ABRASIVE62596CoMat 05-022
CoMat 07-170 FLUOROCARBON RESIN23037CoMat 07-170
CoMat 07-171 THINNER23037CoMat 07-171

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-72-350-067 Remove the Bush, Seal and Guide from the Valve Ring Assembly

      CAUTION

      WHEN YOU REMOVE THE SEAL, DO NOT CAUSE DAMAGE TO THE PARENT MATERIAL.

    1. Refer to Figure and Figure.

      2. Remove the seal.

      1. Refer to VRS1751, TASK 72-32-72-300-006 (REPAIR-006).

      3. Remove the bush.

      1. Refer to VRS1752, TASK 72-32-72-300-005 (REPAIR-005).

      4. Remove the guide.

      1. Refer to VRS1785, TASK 72-32-72-300-007 (REPAIR-007).

    2. SUBTASK 72-32-72-350-068 Remove the Chromate Conversion Coating

    1. Refer to Figure.

      2. Attach applicable sling to the part, as necessary.

      1. Use slings with titanium contact faces or aluminium wire.

      3. Soak the part in solution for 10 to 30 minutes, at temperature of 122 to 140 deg F (50 to 60 deg C), as necessary.

      1. Refer to the SPM TASK 70-11-48-110-501, SUBTASK 70-11-48-110-021.

      4. Soak the part in solution for 5 to 15 minutes, at temperature of 158 to 194 deg F (70 to 90 deg C).

      1. Use CoMat 01-555 ALKALINE CLEANER of 4 to 6.7 oz/gal (30 to 50 g/L).

    5. Flush the part in a flow of clean cold water.

      6. CAUTION

        THE TOTAL IMMERSION TIME MUST NOT BE MORE THAN 150 SECONDS TO PREVENT THE BASE MATERIAL DAMAGE.

        Soak the part in solution for 30 to 90 seconds, at temperature of 59 to 86 deg F (15 to 30 deg C).

      1. Use CoMat 01-556 REMOVER of 15 to 25 percent.

    7. Flush the part in a flow of clean, cold water.

      8. Visually examine the surface of area B.

      1. If the surface of area B still has rainbow-like gold in color, do Step, Step and Step again.

    3. SUBTASK 72-32-72-350-069 Prepare the Test Pieces

    1. Refer to Figure and Figure.

    2. Machine the Test Pieces from Aluminum alloy (AMS4132 or AMS4037) flat panels.

      3. Dry abrasive blast the Test Pieces.

      1. Use CoMat 05-022 ALUMINUM OXIDE ABRASIVE. Use a dry blast system cabinet.

        Use an air pressure of 42.67 to 56.89 psi (0.29 to 0.39 MPa).

        The surface roughness to be coated must be 118 to 177 microinches (3.0 to 4.5 micrometers).

    4. SUBTASK 72-32-72-350-070 Remove the Damaged Teflon Coating

      CAUTION

      AFTER REMOVAL, TO PREVENT CONTAMINATION, DO NOT TOUCH THE COMPONENT BY HAND AND COVER BY CRAFT PAPER OR EQUIVALENT.

    1. Refer to Figure.

      2. Mask areas (AREA B) where teflon coating is not applied.

      3. Dry abrasive blast to remove the Teflon coating.

      1. Use CoMat 05-022 ALUMINUM OXIDE ABRASIVE. Use a dry blast system cabinet. Use an air pressure of 42.67 to 56.89 psi (0.29 to 0.39 MPa).

        The surface roughness on the area to be coated must be 118 to 177 microinches (3.0 to 4.5 micrometers) after removel of all damaged teflon coating.

    4. Remove masking tape.

    5. Make sure that all abrasive grit is removed.

      7. Dry.

      1. Air dry for 10 minutes minimum.

    5. SUBTASK 72-32-72-350-071 Apply the Teflon Coating to the Valve Ring and Test Pieces

    1. Refer to Figure, Figure and Figure.

      2. Mask the surfaces of area B.

    3. Pre-heat the valve ring and test pieces to 167 to 185 def F (75 to 85 deg C).

      4. Spray coat of Teflon on area A of the valve ring and test pieces.

      1. Mix CoMat 07-171 THINNER maximum 20 percent with Teflon coating, as necessary.

        Coating thickness is required between 0.00150 in. (0.038 mm) and 0.00248 in. (0.063 mm) after curing.

      5. Dry the coating at 167 to 185 deg F (75 to 85 deg C).

      1. If sprayed coating is first layer, dry for 2 to 5 minutes.

        If sprayed coating is over second layer, dry for 5 to 10 minutes.

    6. After drying, if it cannot dry enough at room temperature, dry the painted surface at less than 158 deg F (70 deg C) at maximum 1 minute for each spray.

    7. Do Step thru Step again so as to obtain the required thickness in Step.

      8. Visually examine the coating surface.

      1. Unwanted inclusions, cracks, blisters, wrinkles, waviness and non-uniform coating surface are not permitted.

      9. Cure the coating.

      1. Starting from room temperature, increase the temperature to 275 to 293 deg F (135 to 145 deg C) within 10 to 15 minutes.

        Hold the temperature for 10 to 15 minutes. Then increase the temperature to 347 to 365 deg F (175 to 185 deg C) within 25 to 35 minutes and hold for 60 to 70 minutes.

        Then decrease the temperature from 347 to 365 deg F (175 to 185 deg C) to room temperature at any rate.

    10. Remove masking tape from Valve Ring.

    6. SUBTASK 72-32-72-350-072 Do the Tests and examine the Coating Thickness

    1. Refer to Figure, Figure and Figure.

      2. Do the tests for the test piece.

      1. If the test pieces are not acceptable, do Step thru Step again.

      3. Visually examine the coating surface.

      1. Unwanted inclusions, cracks, blisters, wrinkles, waviness and non-uniform coating surface are not permitted.

        If the coating surface is not acceptable, do Step thru Step again.

      4. Examine the coating thickness.

      1. 0.00150 to 0.00248 in. (0.038 to 0.063 mm) is permitted.

        If the coating thickness is not acceptable, do Step thru Step again.

    7. SUBTASK 72-32-72-350-073 Apply the Chromate Conversion Coating to the Valve Ring

    1. Refer to Figure.

      2. Apply chromate conversion coating on area B.

      1. Refer to the SPM TASK 70-38-02-300-503, SUBTASK 70-38-02-300-001.

        NOTE

        Wet or dry blast may be used as surface treatment for dipping procedure, refer to the SPM TASK 70-12-01-120-501 or SPM TASK 70-12-02-120-501. Use aluminum oxide grit from 220 to 500 mesh.

    8. SUBTASK 72-32-72-350-074 Install the Bush, Seal and Guide to the Valve Ring

    1. Refer to Figure and Figure.

      2. Install the seal.

      1. Refer to VRS1751, TASK 72-32-72-300-006 (REPAIR-006).

      3. Install the bush.

      1. Refer to VRS1752, TASK 72-32-72-300-005 (REPAIR-005).

      4. Install the guide.

      1. Refer to VRS1785, TASK 72-32-72-300-007 (REPAIR-007).

    9. SUBTASK 72-32-72-350-075 Touch up the Chromate Conversion Coating to the Valve Ring

    1. Refer to Figure and Figure.

      2. If necessary, apply chromate conversion coating to the part, if the coating is damaged during installation of the Bush, Seal and guide.

      1. Refer to the SPM TASK 70-38-02-300-503, SUBTASK 70-38-02-300-002.

    10. SUBTASK 72-32-72-350-076 Identify the Repair

      1. Mark VRS1748, adjacent to the part number.

      1. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

        Use vibro-engraving equipment.

      2. Apply chromate conversion coating to the vibro engraved mark.

      1. Refer to the SPM TASK 70-38-02-300-503, SUBTASK 70-38-02-300-002.

    11. Figure: Repair Details and Dimensions

    Sheet 1

    Legend
    Repair Details and Dimensions

    Sheet 1

    Close

    Figure: Repair Details and Dimensions

    Sheet 2

    Legend
    Repair Details and Dimensions

    Sheet 2

    Close

    Figure: Repair Details and Dimensions

    Sheet 1

    Legend
    Repair Details and Dimensions

    Sheet 1

    Close

    Figure: Repair Details and Dimensions

    Sheet 2

    Legend
    Repair Details and Dimensions

    Sheet 2

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised effectivity table, preliminary requirements, figure and deleted support equipments. (07VJ808A)

Manufacturer Code:07512
Enterprise Name:SAINT-GOBAIN PERFORMANCE PLASTICS
BU Name:SAINT-GOBAIN PERFORMANCE PLASTICS
Street:150 DEY ROAD
City:WAYNE
State:NJ
Zip Code:07470
Country:USA
Phone Number:1-973-696-4700
Fax Number:1-973-696-4056
Internet:www.plastics.saint-gobain.com, www.saint-gobain.com
Manufacturer Code:0AL61
Enterprise Name:MILLIPORESIGMA
BU Name:MILLIPORESIGMA
Street:400 SUMMIT DR
City:BURLINGTON
State:MA
Zip Code:01803
Country:UNITED STATES OF AMERICA
Manufacturer Code:23037
Enterprise Name:DUPONT
BU Name:DUPONT
Street:1007 MARKET ST
City:WILMINGTON
State:DE
Zip Code:19898
Country:USA
Phone Number:1-302-774-7321, 800-441-7715
Fax Number:1-302-774-1000
Email:info@dupont.com
Internet:www.dupont.com
Manufacturer Code:62596
Enterprise Name:MICRO ABRASIVES CORPORATION
BU Name:MICRO ABRASIVES CORPORATION
Street:720 SOUTHAMPTON RD
P.O. Box:669
City:WESTFIELD
State:MA
Zip Code:01085-0669
Country:USA
Phone Number:1-413-562-3641
Fax Number:1-413-562-7409
Internet:www.microgrit.com
Manufacturer Code:K6835
Enterprise Name:MED-LAB LTD
BU Name:MED-LAB LTD
Street:COPELAND ST
City:DERBY
Zip Code:DE1 2PU
Country:GREAT BRITAIN
Phone Number:44-1332-349094
Fax Number:44-1332-371237
Email:sales@med-lab.co.uk
Internet:www.med-lab.co.uk
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:SCW17
Enterprise Name:THE JAPAN CEE-BEE CHEMICAL CO LTD
BU Name:THE JAPAN CEE-BEE CHEMICAL CO LTD
Building:4TH FLOOR, OMORI PLAZA BUILDING
Street:28-3 MINAMI-OI 3-CHOME
City:TOKYO
Province:SHINAGAWA-KU
Zip Code:140-0013
Country:JAPAN
Internet:http://www.jcbchem.co.jp
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 01-339
Type:sp01
Supply Short Name:CoMat 01-339 ALKALI CLEANER (GENERAL PURPOSE)
Supply Name:CoMat 01-339 ALKALI CLEANER (GENERAL PURPOSE)
Specification Groups:
Doc NumberType
CEE-BEE A-7X7SPMC 104 (PW REF)
SPMC 104CEE-BEE A-7X7
Suppliers:
ManufacturerRemarks
LOCAL
3MCT7
U5702
Manufacturer Code:0AL61
Supply Number:CoMat 01-410
Type:sp01
Supply Short Name:CoMat 01-410 ISOPROPYL ALCOHOL, REAGENT GRADE
Supply Name:CoMat 01-410 ISOPROPYL ALCOHOL, REAGENT GRADE
Specification Groups:
Doc NumberType
PMC 9016 (PW REF)PX1834
Suppliers:
ManufacturerRemarks
0AL61
Manufacturer Code:SCW17
Supply Number:CoMat 01-555
Type:sp01
Supply Short Name:CoMat 01-555 ALKALINE CLEANER
Supply Name:CoMat 01-555 ALKALINE CLEANER
Specification Groups:
Doc NumberType
JCR-317 (JAEC REF)CEE-BEE R-28
Suppliers:
ManufacturerRemarks
SCW17
Manufacturer Code:SCW17
Supply Number:CoMat 01-556
Type:sp01
Supply Short Name:CoMat 01-556 REMOVER
Supply Name:CoMat 01-556 REMOVER
Specification Groups:
Doc NumberType
JCR-318 (JAEC REF)CEE-BEE B-21bL
Suppliers:
ManufacturerRemarks
SCW17
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:K6835
Supply Number:CoMat 02-006
Type:sp01
Supply Short Name:CoMat 02-006 ADHESIVE TAPE ALUMINIUM FOIL
Supply Name:CoMat 02-006 ADHESIVE TAPE ALUMINIUM FOIL
Specification Groups:
Doc NumberType
OMAT: 298 (RR REF)SCOTCH 425
Suppliers:
ManufacturerRemarks
K6835
52152
76381
LOCAL
Manufacturer Code:X111X
Supply Number:CoMat 02-051
Type:sp01
Supply Short Name:CoMat 02-051 HIGH TEMPERATURE GLASS CLOTH TAPE
Supply Name:CoMat 02-051 HIGH TEMPERATURE GLASS CLOTH TAPE
Suppliers:
ManufacturerRemarks
X111X
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:07512
Supply Number:CoMat 02-198
Type:sp01
Supply Short Name:CoMat 02-198 ADHESIVE TAPE (MASKING METAL SPRAY)
Supply Name:CoMat 02-198 ADHESIVE TAPE (MASKING METAL SPRAY)
Specification Groups:
Doc NumberType
OMAT: 2/96 (RR REF)CHR 23816 TAPE
Suppliers:
ManufacturerRemarks
07512
K6835
K1369
KC622
Manufacturer Code:62596
Supply Number:CoMat 05-022
Type:sp01
Supply Short Name:CoMat 05-022 ALUMINUM OXIDE ABRASIVE
Supply Name:CoMat 05-022 ALUMINUM OXIDE ABRASIVE
Specification Groups:
Doc NumberType
PMC 3046ALUMINUM OXIDE No. 240
Suppliers:
ManufacturerRemarks
62596
Manufacturer Code:23037
Supply Number:CoMat 07-170
Type:sp01
Supply Short Name:CoMat 07-170 FLUOROCARBON RESIN
Supply Name:CoMat 07-170 FLUOROCARBON RESIN
Specification Groups:
Doc NumberType
JCR-320TEFLON S DuPont 958-406
Suppliers:
ManufacturerRemarks
23037
Manufacturer Code:23037
Supply Number:CoMat 07-171
Type:sp01
Supply Short Name:CoMat 07-171 THINNER
Supply Name:CoMat 07-171 THINNER
Specification Groups:
Doc NumberType
JCR-319TN-8595
Suppliers:
ManufacturerRemarks
23037