TASK 72-41-13-300-029 HPC Rear Shaft - Repair Of The No. 4 Bearing Spacer Face By Material Removal, Repair-029 (VRS6662)

DMC:V2500-A0-72-41-1301-00A-655A-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 72-41-13-300-029 HPC Rear Shaft - Repair Of The No. 4 Bearing Spacer Face By Material Removal, Repair-029 (VRS6662)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

01-900

6A4158

A

01-900

6A5868

A

01-900

6A7712

A

01-900

6A7714

A

01-900

6A4151

B

01-900

6A7708

B

Material of component

PART IDENT

MATERIAL

HP compressor rear shaft

Heat resisting alloy

General

This repair must only be done when the instruction to do so is given in TASK 72-41-13-200-000 (Inspection-000).

This TASK gives the procedure to repair the HP compressor rear shaft.

TASKS identified by SPM TASK are in the Standard Practices and Processes Manual (SPM).

Price and availability

Refer to International Aero Engines

Related Repairs - none

NOTE

Equipment and materials necessary to do this repair are in the SPM TASKS given below:
SPM TASK 70-09-00-400-501
SPM TASK 70-11-01-300-503
SPM TASK 70-23-05-230-501
SPM TASK 70-11-39-300-503

NOTE

  1. It is possible that some materials in the Consumable Materials chart cannot be used for some or all of the necessary applications. Before you use the materials, make sure the types, quantities and applications of the materials necessary are legally permitted in your location. All persons must obey all applicable federal, state, local and provincial laws and regulations when it is necessary to work with these materials.

  2. To identify the consumable materials, refer to the overhaul Processes and Consumables Index (PCI).

  3. Other necessary consumable materials are referred to in the SPM TASKs.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Chemical cleaning equipmentLOCALChemical cleaning equipment
Cylindrical grinding machineLOCALCylindrical grinding machine
Dial test indicatorsLOCALDial test indicators
Penetrant Crack Test EquipmentLOCALPenetrant crack test equipment
Standard workshop equipmentLOCALStandard workshop equipment
Vibrating marking pencilLOCALVibrating marking pencil
Workshop inspection equipmentLOCALWorkshop inspection equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)LOCALCoMat 06-022

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-13-220-202 Make sure the HP Compressor Rear Shaft can be Repaired

    1. Refer to Figure and Figure.

      2. NOTE

        Dimensions given are necessary after machining.

        Visually and dimensionally examine HP compressor rear shaft.

      1. Make sure there is sufficient material on the No. 4 bearing front seal seat face for machining.

    2. SUBTASK 72-41-13-324-061 Grind the HP Compressor Rear Shaft

    1. CAUTION

      DO NOT REMOVE MORE MATERIAL THAN IS NECESSARY.

      Refer to Figure and Figure.

      2. Install the fixture into the cylindrical grinding machine.

      1. Use a locally made grinding fixture.

      2. Use a cylindrical grinding machine and standard workshop equipment.

      3. Install the HP compressor rear shaft on to the fixture and set to turn correctly.

      1. Use a dial test indicator and standard workshop equipment.

      2. Make sure that datums A and B are set to turn correctly.

      4. Grind the HP compressor rear shaft.

      1. Use a cylindrical grinding machine.

      2. Machine only the minimum quantity of material to remove frettage.

        Grinding Data

        Wheel abrasive

        Aluminum oxide

        Grain size

        60-100

        Grade

        I-K

        Structure

        4-6

        Bond

        Vitrified

        Peripheral wheel-speed

        4000-6000 ft/min (1220-1825 M/min)

        Work-speed

        80 ft/min (24 M/min)

        In-feed rate

        0.00005 in./rev (0.0013 mm/rev)

        NOTE

        The above information is for reference only.

      5. Remove burrs.

      1. Use standard workshop equipment.

    6. Remove the HP compressor rear shaft from the cylindrical grinder.

    3. SUBTASK 72-41-13-110-087 Clean the HP Compressor Rear Shaft

      1. Chemically clean the part.

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

      2. Use chemical cleaning equipment.

    4. SUBTASK 72-41-13-110-088 Do a Swab Etch

    1. Refer to Figure and Figure.

      2. Swab etch the repaired area.

      1. Refer to the SPM TASK 70-11-39-300-503, SUBTASK 70-11-39-300-001.

      2. Use chemical cleaning equipment.

      3. Visually examine the HP compressor rear shaft.

        1. Use X10 binoculars.

        1. Indications of defects are not permitted.

    5. SUBTASK 72-41-13-230-100 Do a Crack Test

      1. Do a crack test on the repaired area.

        1. Refer to the SPM TASK 70-23-05-230-501.

        2. Use penetrant crack test equipment.

        3. Cracks are not permitted.

    6. SUBTASK 72-41-13-220-203 Examine the HP Compressor Rear Shaft

    1. Refer to Figure and Figure.

      2. Do a visual inspection and measure the dimensions of the HP compressor rear shaft.

        1. Use workshop inspection equipment.

        1. Make sure the surface finish of the repaired surface is as given in the figures.

    7. SUBTASK 72-41-13-350-091 Identify the Repair

    1. Refer to Figure.

      2. Make a mark VRS6662 adjacent to the assembly number.

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

    8. 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

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X222X
Supply Number:CoMat 06-022
Type:sp01
Supply Short Name:CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)
Supply Name:CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)
Specification Groups:
Doc NumberType
ARDROX 985-P14 OMAT: 652 (CHEMETALL OAKITE 985-P14)It is not permitted to mix the selected CoMat 06‐022 letter suffix material with other CoMat 06‐022 letter suffix materials. Where CoMat 06‐022 is specified with no suffix, use one of the CoMat 06‐ 022 letter suffix materials.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:LOCAL
Tool Number:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Cylindrical grinding machine
Tool Name:Cylindrical grinding machine
Link not Found
Manufacturer Code:LOCAL
Tool Number:Penetrant crack test equipment
Tool Name:Penetrant Crack Test Equipment
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment