TASK 72-41-31-300-024 HPC Front Cases - Repair Worn Or Damaged Stage 6 Bush Holes By The Installation Of Steel Liner(s),Repair-024 (VRS6618)

DMC:V2500-A0-72-41-3101-00A-664A-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 72-41-31-300-024 HPC Front Cases - Repair Worn Or Damaged Stage 6 Bush Holes By The Installation Of Steel Liner(s),Repair-024 (VRS6618)

Effectivity

FIG/ITEM

PART NO.

01-400

6A3462

01-400

6A3675

01-400

6A5470

Material of component

PART IDENT

SYMBOL

MATERIAL

HP Compressor Front Case Assembly

TEG

6 percent, Aluminum

4 percent Vanadium alloy

Liner

EAF

Chromium - Nickel (18/8) -

Stabilised Steel

General

This Repair must only be done when the instruction to do so is given in 72-41-31 Inspection/Check.

This Repair, repairs worn or damaged Stage 6 VSV Bush Locations, in the HP Compressor Front Case Assembly, by the Installation of Steel Liner(s).

The Practises and processes referred to in the procedure by the TASK/SUBTASK numbers are in the SPM.

Price and availability

Refer to International Aero Engines

Related repairs - none

NOTE

Equivalent materials or equipment can be used.
More equipment and materials necessary to do this Repair are in the TASKS given below:
TASK 70-09-00-400-501
TASK 70-11-01-300-503
TASK 70-11-03-300-503
TASK 70-11-08-300-503
TASK 70-23-01-230-501

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Chemical cleaning equipmentLOCALChemical cleaning equipment
Boring machineLOCALBoring machine
Standard workshop equipmentLOCALStandard workshop equipment
Penetrant Crack Test EquipmentLOCALPenetrant crack test equipment
Workshop inspection equipmentLOCALWorkshop inspection equipment
Heat protection glovesLOCALHeat protection gloves
DriftLOCALDrift

Non-metallic

Vibrating marking pencilLOCALVibrating marking pencil

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-026 LIQUID NITROGENLOCALCoMat 03-026

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Liner6A657684 AR.

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-31-110-086 Clean the HP Compressor Front Case Assembly

      1. Chemically clean the HP Compressor Front Case Assembly.

      1. Use chemical cleaning equipment.

    2. SUBTASK 72-41-31-323-051 Machine the Worn or Damaged HP Compressor Front Case Assembly

      CAUTION

      TITANIUM COMPONENT - YOU MUST USE SILICON CARBIDE TYPE ABRASIVE WHEELS, STONES AND PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.

      CAUTION

      TITANIUM COMPONENT - DO NOT USE FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.

      CAUTION

      TITANIUM COMPONENT - IF THE MATERIAL SHOWS A CHANGE IN COLOR, TO DARKER THAN A LIGHT STRAW COLOR, THE COMPONENT IS TO BE REJECTED.

    1. Refer to Figure and Figure.

      2. Machine the worn or damaged HP Compressor Front Case Assembly, Stage 6 VSV Bush Location(s).

      1. Machine to remove all the damage and wear.

        Only remove the minimum amount of material.

        Use a suitable boring machine, with standard workshop equipment.

    3. SUBTASK 72-41-31-110-087 Do a Swab Etch

      1. Chemically clean.

      1. Refer to the SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-001.

        Use chemical cleaning equipment.

      2. Swab etch the repaired area(s).

      1. Refer to the SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-002.

        Use chemical cleaning equipment.

    4. SUBTASK 72-41-31-230-086 Do a Crack Test

      1. Do a penetrant crack test of the repaired area(s).

      1. Refer to the SPM TASK 70-23-01-230-501.

        Use penetrant crack test equipment.

        Cracks are not permitted.

    5. SUBTASK 72-41-31-220-209 Examine the HP Compressor Front Case Assembly

    1. Refer to Figure and Figure.

      2. Visually examine and measure the dimensions of the HP Compressor Front Case Assembly, Stage 6 VSV Bush Location(s).

      1. Make sure the bush location(s) are to the given limits.

        Make sure there will be an interference fit of 0.0005 to 0.001in. (0.0127 to 0.0254 mm) on the liner(s) to bush location(s), during assembly.

        Use workshop inspection equipment.

    6. SUBTASK 72-41-31-350-086 Install the Liner(s)

    1. Refer to Figure and Figure.

      2. Freeze the liner.

      1. Use 6A6576 liner, 01-480, 84 off, as necessary.

        Freeze the liner to minus 30 degrees F, with CoMat 03-026 LIQUID NITROGEN.

        Use standard workshop equipment, with heat protective gloves.

      3. Apply locktite to the machined bush location(s) in the HP Compressor Front Case Assembly.

      1. Use locktite 601 retainer or a suitable equivalent.

      4. Install the liner(s) in to the machined bush location(s), immediately after removal from the liquid nitrogen.

      1. Use a non-metallic drift to make sure the liner(s) is/are seated against the HP Compressor Front Case Assembly.

        Allow the part to reach room temperature.

    7. SUBTASK 72-41-31-220-210 Examine the Liner(s)

    1. Refer to Figure and Figure.

      2. Visually examine the liner(s) for location.

      1. Make sure the liner(s) are pushed fully into position.

    8. SUBTASK 72-41-31-323-052 Machine the Liner(s)

    1. Refer to Figure and Figure.

      2. Machine the liner(s) bore, to detail dimensions.

      1. Use a suitable boring machine, with standard workshop equipment.

    9. SUBTASK 72-41-31-220-211 Examine the HP Compressor Front Case Assembly

    1. Refer to Figure and Figure.

      2. Visually examine and measure the dimension of the liner(s) and the HP Compressor Front Case Assembly.

      1. Make sure the liner(s) diameters are the same as the adjacent bush location(s) and to the limits specified.

        Use workshop inspection equipment.

    10. SUBTASK 72-41-31-230-087 Do a Crack Test

      1. Do a penetrant crack test of the repaired area(s).

      1. Refer to the SPM TASK 70-23-01-230-501.

        Use penetrant crack test equipment.

        Cracks are not permitted.

    11. SUBTASK 72-41-31-350-087 Identify the Repair

      1. Make a mark VRS6618 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.

    12. Figure: Repair details and dimensions

    Repair details and dimensions

    Figure: Repair details and dimensions

    Repair details and dimensions

    Figure: Repair details and dimensions

    Repair details and dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Link not Found
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Supply Number:CoMat 03-026
Type:sp01
Supply Short Name:CoMat 03-026 LIQUID NITROGEN
Supply Name:CoMat 03-026 LIQUID NITROGEN
Specification Groups:
Doc NumberType
OMAT:220BB-N-411 T2GBC1
JCR-135BB-N-411 T2GBC1
Suppliers:
ManufacturerRemarks
LOCAL
U2046
U2096
Manufacturer Code:LOCAL
Tool Number:Boring machine
Tool Name:Boring machine
Manufacturer Code:LOCAL
Tool Number:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Drift
Tool Name:Drift
Manufacturer Code:LOCAL
Tool Number:Heat protection gloves
Tool Name:Heat protection gloves
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