TASK 72-50-52-300-001 No. 5 Bearing Retaining Plate - Chromium Plate The Piloting Diameter, Repair-001 (VRS5012)

DMC:V2500-A0-72-50-5202-00A-647A-C|Issue No:002.00|Issue Date:2013-11-01

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 72-50-52-300-001 No. 5 Bearing Retaining Plate - Chromium Plate The Piloting Diameter, Repair-001 (VRS5012)

Effectivity

FIG/ITEM

PART NO.

01-140

4P8075

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Bearing retainer

Corrosion and heat

resistant steel

General

Price and availability - none

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

NOTE

  1. To identify the consumable materials refer to the PCI.

  2. Other consumable materials are given in SPM

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment
Grinding machineLOCALGrinding machine
Magnetizing unitLOCALMagnetizing unit
Demagnetizing unitLOCALDemagnetizing unit
Hot oil tankLOCALHot oil tank
Pressure shotpeen systemLOCALPressure shotpeen system
BasketLOCALBasket
Vapor degreaserLOCALVapor degreaser
OvenLOCALOven
Process Plating TanksLOCALProcess plating tanks
Magnifying glassLOCALMagnifying glass
Vibrating marking pencilLOCALVibrating marking pencil

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-001 SOLVENT, DELETED0AM53CoMat 01-001
CoMat 02-017 WAXLOCALCoMat 02-017
CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)LOCALCoMat 01-023
CoMat 02-034 METALLIC MASKING TAPE(LEAD FOIL)76381CoMat 02-034
CoMat 05-030 CAST STEEL SHOT DELETED0AM53CoMat 05-030
CoMat 10-023 MINERAL OIL73277CoMat 10-023

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-52-320-051 Machine the Piloting Diameter

    1. Refer to: Figure

      2. Machine the piloting diameter.

      1. Remove all of the damage and wear.

        Keep the removal of material to the minimum necessary to remove the damage.

        The preplating diameter must be between 5.5821 and 5.5758in. (141.786 and 141.626 mm).

        Surface rough must be 32 microinch (0.8 micron) before plating.

    2. SUBTASK 72-50-52-240-052 Examine the Bearing Retainer

      1. Do the magnetic particle inspection for cracks.

      1. Refer to the SPM TASK 70-24-01-240-501.

        No cracks are permitted.

    3. SUBTASK 72-50-52-210-051 Nital Etch the Piloting Diameter

      1. Do the nital etch on the piloting diameter to find sign of burning.

      1. Refer to the SPM TASK 70-21-02-210-501.

        Machine the piloting diameter if there are signs of burnt metal.

        Keep the removal of material to the minimum necessary to remove the damage.

    4. SUBTASK 72-50-52-370-051 De-embrittle the Bearing Retainer

      1. Put the bearing retainer into oil at 284 deg F (140 deg C) for 2 hours.

      1. Do this procedure as soon as possible in less than 2 hours after the etch.

    5. SUBTASK 72-50-52-110-053 Clean the Bearing Retainer

      1. Do the vapor degreasing.

    6. SUBTASK 72-50-52-330-051 Chromium Plate the Piloting Diameter

    1. Refer to: Fig. 72-50-52-330-004

      2. Mask the areas not to be plated.

      3. Do the chromium plating.

      1. Refer to the SPM TASK 70-33-02-330-501.

        Plate to a sufficient thickness to permit the machining to the last dimensions.

        The plate out of the piloting diameter is permitted but must be removed.

    4. Remove the mask.

      5. Clean and dry the bearing retainer.

      1. Flush with cold water.

        Flush with hot water.

        Dry with air blast.

    7. SUBTASK 72-50-52-370-052 De-embrittle the Bearing Retainer

      1. Put the bearing retainer into an oven at 284 to 320 deg F (140 to 160 deg C) for 5 hours.

      1. Do this procedure as soon as possible in less than 4 hours after the plating.

    8. SUBTASK 72-50-52-220-053 Examine the Plating

      1. Do the visual inspection of the plating for finish, cracks and adhesion.

      1. Plating must have constant color.

        No bubbles or sign of burned metal are permitted.

    9. SUBTASK 72-50-52-320-052 Machine the Piloting Diameter

    1. Refer to: Figure

      2. Machine the piloting diameter.

      1. The last dimension of the piloting diameter must be between 5.590 and 5.588 in. (141.986 and 141.946 mm).

        Chamfer, where necessary.

    10. SUBTASK 72-50-52-220-054 Examine the Chromium Plated Area

      1. Do the visual inspection of the chromium plated area for cracks and adhesion.

      1. Use a 5 x magnifying glass.

        The natural network crack, emphasized by grinding, is permitted.

      2. Measure the thickness of the plating.

      1. Do not accept thickness less than 0.001in. (0.025 mm) after the last machining.

    11. SUBTASK 72-50-52-350-053 Record the Repair

      1. Vibro engrave VRS5012 adjacent to the part number.

      1. Remove the metal lifted by marking the number.

    12. Figure: Chromium plate the piloting diameter

    Chromium plate the piloting diameter

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion

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:73277
Enterprise Name:HOUGHTON INTERNATIONAL INC
BU Name:HOUGHTON INTERNATIONAL INC
Street:MADISON AND VANBUREN AVENUES
P.O. Box:930
City:VALLEY FORGE
State:PA
Zip Code:19482-0930
Country:USA
Phone Number:1-610-666-4000, 1-610-666-4096
Fax Number:1-610-666-1376, 1-610-666-5682
Internet:www.houghtonintl.com
Manufacturer Code:76381
Enterprise Name:3M COMPANY
BU Name:3M COMPANY
Department:3M CENTER
City:ST PAUL
State:MN
Zip Code:55144-1000
Country:USA
Phone Number:1-651-733-1110
Fax Number:1-651-733-9973
Internet:www.mmm.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X111X
Supply Number:CoMat 01-001
Type:sp01
Supply Short Name:CoMat 01-001 SOLVENT, DELETED
Supply Name:CoMat 01-001 SOLVENT, DELETED
Specification Groups:
Doc NumberType
wiring harnesses. Where CoMat 01‐001 is specified to clean mechanical components, use one or more of the solvents that SPM TASK 70‐11‐26‐300‐503 specifies as applicable.DELETED. Where CoMat 01‐001 is specified to clean electrical contacts or wiring harnesses, use one or more of the solvents that SPM TASK 70‐11‐57‐110‐501 specifies to clean electrical contacts or
Suppliers:
ManufacturerRemarks
X111X
Manufacturer Code:LOCAL
Supply Number:CoMat 01-023
Type:sp01
Supply Short Name:CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)
Supply Name:CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)
Specification Groups:
Doc NumberType
OMAT: 111 (RR REF)99,0 PURE FLAKE O-C-303
JCR-034 (JAEC REF)99,0 PURE FLAKE O-C-303
MTH 126 (MTU REF)99,0 PURE FLAKE O-C-303
Suppliers:
ManufacturerRemarks
LOCAL
U1185
70657
24853
K6835
Manufacturer Code:LOCAL
Supply Number:CoMat 02-017
Type:sp01
Supply Short Name:CoMat02-017 WAX
Supply Name:CoMat 02-017 WAX
Specification Groups:
Doc NumberType
11429Y/Y MIL-P-23242 OMAT: 228PLATING WAX WILKINS CAMPBELL
JCR-178PLATING WAX WILKINS CAMPBELL
Suppliers:
ManufacturerRemarks
LOCAL
K6835
K4404
Manufacturer Code:76381
Supply Number:CoMat 02-034
Type:sp01
Supply Short Name:CoMat 02-034 METALLIC MASKING TAPE (LEADFOIL)
Supply Name:CoMat 02-034 METALLIC MASKING TAPE(LEAD FOIL)
Specification Groups:
Doc NumberType
PMC 4138-1 THRU -53M LEAD FOIL TAPE 420 (with linner) or 3M LEAD FOIL TAPE 421 (without linner)
Suppliers:
ManufacturerRemarks
76381
Manufacturer Code:0AM53
Supply Number:CoMat 05-030
Type:sp01
Supply Short Name:CoMat 05-030 CAST STEEL SHOT DELETED
Supply Name:CoMat 05-030 CAST STEEL SHOT DELETED
Specification Groups:
Doc NumberType
DELETED
Suppliers:
ManufacturerRemarks
0AM53
Manufacturer Code:73277
Supply Number:CoMat 10-023
Type:sp01
Supply Short Name:CoMat 10-023 MINERAL OIL
Supply Name:CoMat 10-023 MINERAL OIL
Specification Groups:
Doc NumberType
HOUGHTON MAR-TEMP 300
Suppliers:
ManufacturerRemarks
73277
Manufacturer Code:LOCAL
Tool Number:Basket
Tool Name:Basket
Manufacturer Code:LOCAL
Tool Number:Demagnetizing unit
Tool Name:Demagnetizing unit
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Link not Found
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Link not Found
Manufacturer Code:LOCAL
Tool Number:Process plating tanks
Tool Name:Process Plating Tanks
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment