TASK 72-60-24-300-014 Input Gearshaft - Chromium Plate The Front Bearing Journal, Repair-014 (VRS5144)

DMC:V2500-A0-72-60-2401-04A-647A-C|Issue No:001.00|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 72-60-24-300-014 Input Gearshaft - Chromium Plate The Front Bearing Journal, Repair-014 (VRS5144)

Effectivity

FIG/ITEM

PART NO.

01-140

4P0175

01-140

4B0285

01-140

4P0287

01-140

4P0294

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Gearshaft

Wrought alloy steel

General

NOTE

To identify the consumable materials refer to the PCI.
Other consumable materials are given in the SPM.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Grinding machineLOCALGrinding machine
Hot oil tankLOCALHot oil tank
Pressure shotpeen systemLOCALPressure shotpeen system
Process Plating TanksLOCALProcess plating tanks
OvenLOCALOven
Magnifying glass, 5xLOCALMagnifying glass, 5x
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 02-034 METALLIC MASKING TAPE(LEAD FOIL)76381CoMat 02-034
CoMat 05-030 CAST STEEL SHOT DELETED0AM53CoMat 05-030

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-24-320-064 Machine the Front Bearing Journal of the Gearshaft

    1. Refer to Figure.

      2. Machine the front bearing journal.

      1. Remove all damage and wear.

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

      3. The preplating diameter must be between 1.7710 to 1.7616 in. (44.984 to 44.745 mm).

      4. Surface roughness must be 32 microin. (0.8 micron) before plating.

      5. Use grinding machine.

    2. SUBTASK 72-60-24-240-056 Examine the Gearshaft

      1. Do the magnetic particle inspection for cracks.

      1. Refer to the SPM TASK 70-24-01-240-501. Cracks are not permitted.

    3. SUBTASK 72-60-24-210-055 Nital Etch the Front Bearing Journal

      1. Do the nital etch on the front bearing journal to find signs of burnt metal.

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

      2. Machine the front bearing journal if there is signs of burnt metal.

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

    4. SUBTASK 72-60-24-370-061 Do the De-embrittlement Treatment

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

      1. Use a hot oil tank.

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

    5. SUBTASK 72-60-24-380-055 Shot-peen the Front Bearing Journal

      1. Shot-peen the front bearing journal surface to an intensity of 0.006A to 0.008A in.

    6. SUBTASK 72-60-24-110-055 Clean the Gearshaft

      1. Vapor degrease the gearshaft.

      1. Refer to the SPM TASK 70-11-01-300-503.

    7. SUBTASK 72-60-24-330-058 Chromium Plate the Front Bearing Journal of the Gearshaft

    1. Refer to Figure.

      2. Mask the areas of the gear not to be plated.

      3. Chromium plate the front bearing journal.

      1. Refer to the SPM TASK 70-33-02-330-501. Plate to a sufficient thickness to permit the machining to the last dimensions.

      2. The plating out of the front bearing journal area is permitted but must be removed.

      3. Use process plating tanks.

    4. Remove the mask.

      5. Clean and dry the gearshaft.

      1. Flush with cold water.

      2. Flush with hot water.

      3. Dry with air blast.

    8. SUBTASK 72-60-24-370-062 De-embrittle the Gearshaft

      1. Put the gearshaft into an oven at 284 to 392 deg F (140 to 200 deg C) for 5 hours.

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

    9. SUBTASK 72-60-24-220-082 Examine the Gearshaft

      1. Visually examine the plating for finish, cracks and adhesion.

      1. Plating must have a constant color.

      2. Cracks are not permitted.

      3. Bubbles or signs of burnt metal are not permitted.

    10. SUBTASK 72-60-24-320-065 Machine the Front Bearing Journal of the Gearshaft

    1. Refer to Figure.

      2. Machine the front bearing journal.

      1. The journal diameter must be between 1.7734 to 1.7730 in. (45.045 to 45.034 mm).

      2. Chamfer where necessary.

      3. Use grinding machine.

    11. SUBTASK 72-60-24-220-083 Examine the Chromium Plated Area

    1. Refer to Figure.

      2. Visually examine the chromium plated area for cracks and adhesion.

      1. Use a 5x magnifying glass. The natural network crack, emphasized by grinding, is permitted.

      3. Measure the thickness of the plating.

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

    12. SUBTASK 72-60-24-350-063 Record the Repair

      1. Vibro engrave VRS5144 adjacent to the part number.

      1. Use vibrating marking pencil.

      2. Remove the metal lifted by marking.

    13. Figure: Chromium plate the front bearing journal of the gearshaft

    Chromium plate the front bearing journal of the gearshaft

Requirements After Job Completion

Follow-On Conditions

NONE
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: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 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
Link not Found
Link not Found
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