TASK 72-41-31-300-026 HPC Front Cases - Replace The Stage 4 And Stage 6 Segment Anti-Rotation Stop Pin(s), Repair-026 (VRS6624)

DMC:V2500-A0-72-41-3101-01A-920A-C|Issue No:002.00|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 72-41-31-300-026 HPC Front Cases - Replace The Stage 4 And Stage 6 Segment Anti-Rotation Stop Pin(s), Repair-026 (VRS6624)

Effectivity

FIG/ITEM

PART NO.

01-400

6A4439

Material of component

PART IDENT

SYMBOL

MATERIAL

HP Compressor Front Case Assembly

TEG

6 percent aluminum

4 percent vanadium alloy

Anti-Rotation Stop Pin

EAF

Chromium-Nickel Steel

General

This Repair must only be done when the instruction to do so is given in 72-41-31 Inspection-002.

This Repair replaces the Stage 4 and Stage 6 Segment Anti-Rotation Stop Pin(s) in the HP Compressor Front Case Assembly.

The practices 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

  1. Equivalent materials or equipment can be used.

  2. More equipment and materials necessary to do this Repair are in the SPM TASKS given below:

  3. TASK 70-09-00-400-501

  4. TASK 70-11-08-300-503

  5. TASK 70-11-26-300-503

  6. TASK 70-23-05-230-501

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Standard workshop equipmentLOCALStandard workshop equipment
ClothLOCALCloth

Soft clean

Dry Blast EquipmentLOCALDry Blast Equipment
Chemical cleaning equipmentLOCALChemical Cleaning Equipment
Penetrant Crack Test EquipmentLOCALPenetrant Crack Test Equipment
BinocularsLOCALBinoculars

7x or 10x

Heat protection glovesLOCALHeat protection gloves
Vibrating Marking PencilLOCALVibrating Marking Pencil

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-026 LIQUID NITROGENLOCALCoMat 03-026
CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)LOCALCoMat 06-022

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Stage 4 Anti-rotation stop pinLOCALAS206782
Stage 6 Anti-rotation stop pinLOCAL6A43542

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-31-350-088 Remove the Anti-Rotation Stop Pin(s)

    1. Refer to Figure, Figure and Figure.

      2. 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.

        Remove the damaged anti-rotation stop pin(s) from the HP Compressor front case assembly.

      1. Use standard workshop equipment.

      3. Remove sharp edges or burrs around the location hole(s).

      1. Use standard workshop equipment.

    2. SUBTASK 72-41-31-160-051 Clean the Location Hole(s)

      1. Clean the location hole(s).

      1. Use a soft clean cloth and blast with air.

    3. SUBTASK 72-41-31-110-088 Do a Swab Etch

      1. Chemically clean the repaired area.

      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.

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

        Use chemical cleaning equipment.

    4. SUBTASK 72-41-31-230-088 Do a Crack Test

      1. Do a local penetrant crack test around the location hole(s).

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

        Cracks are not permitted.

    5. SUBTASK 72-41-31-210-051 Examine the HP Compressor Front Case Assembly

    1. Refer to Figure, Figure and Figure.

      2. Examine the HP Compressor front case assembly around the location hole(s) for crack indications.

        1. Use X7 or X10 binoculars.

        1. Reject if cracked.

      3. Visually examine and measure the dimensions of the location hole(s).

        1. Hole diameter(s) between 0.236 in. - 0.237 in. (5.99 mm - 6.01 mm).

        1. Accept.

        2. Hole diameter(s) larger than in Step.

        1. Weld repair per Repair, VRS3861 TASK 72-41-31-300-023 (REPAIR-023).

        3. Make sure you can get an interference fit of 0.00008 in. to 0.00126 in. (0.002 mm to 0.032 mm) on the hole diameter.

        1. Use workshop inspection equipment.

    6. SUBTASK 72-41-31-350-089 Install the Anti-Rotation Stop Pin(s)

    1. Refer to Figure, Figure and Figure.

      2. Freeze the pin(s).

        1. Use the appropriate part number for Stage 4 and/or Stage 6 pin(s).

        1. Freeze the pin(s) to -30 degrees F.

        2. Use CoMat 03-026 LIQUID NITROGEN, with standard workshop equipment.

        3. Use heat protective gloves.

      3. Install the anti-rotation stop pin(s) in the location hole(s) in the HP Compressor front case assembly.

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

        Allow the parts to reach room temperature.

        Use standard workshop equipment.

    7. SUBTASK 72-41-31-220-212 Examine the HP Compressor Front Case Assembly

    1. Refer to Figure, Figure and Figure.

    2. Visually examine the anti-rotation stop pin(s) for location.

    8. SUBTASK 72-41-31-230-089 Do a Crack Test

      1. Do a local penetrant crack test around the location hole(s).

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

        Cracks are not permitted.

    9. SUBTASK 72-41-31-110-089 Clean the Repair Area(s)

      1. Chemically clean the repair areas of the HP Compressor front case assembly to remove the fluorescent penetrant.

      1. Refer to the SPM TASK 70-11-26-300-503.

        Use chemical cleaning equipment.

    10. SUBTASK 72-41-31-350-090 Identify the Repair

      1. Make a mark VRS6624 adjacent to the assembly number.

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

        Use vibro-engraving equipment.

    11. Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Figure: Pin Installation

    Pin Installation

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the repair procedure. (19VG123)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
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: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:Binoculars
Tool Name:Binoculars
Link not Found
Manufacturer Code:LOCAL
Tool Number:Cloth
Tool Name:Cloth
Manufacturer Code:LOCAL
Tool Number:Dry Blast Equipment
Tool Name:Dry Blast Equipment
Manufacturer Code:LOCAL
Tool Number:Heat protection gloves
Tool Name:Heat protection gloves
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Vibrating Marking Pencil
Tool Name:Vibrating Marking Pencil