TASK 72-41-13-300-026 HP Compressor Rear Shaft - Repair Damaged Threads by Material Removal, Repair-026 (VRS6617)

DMC:V2500-A0-72-41-1301-05A-649A-C|Issue No:002.00|Issue Date:2016-08-01

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 72-41-13-300-026 HP Compressor Rear Shaft - Repair Damaged Threads by Material Removal, Repair-026 (VRS6617)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

01-900

6A4151

A

01-900

6A7708

B

01-900

6A4158

C

01-900

6A5868

C

01-900

6A7712

D

01-900

6A7714

D

Material of component

PART IDENT

SYMBOL

MATERIAL

HP Compressor Rear Shaft Assembly

QYX

Inconel 718

General

This TASK gives the procedure to repair damaged threads by material removal on the HP Compressor Rear Shaft.

This repair must only be done when the instruction to do so is given in the relevant Inspection/Check inspection procedures (identified by the applicable part number) located in section 72-41-13.

The repair scheme is broken into three parts, as follows:

Part 1: Dress to the depth of the defect (1X times the depth of the defect).

Part 2: Dress to twice the depth of the defect (2X times the depth of the defect).

Part 3: Dress to remove raised material, burrs and sharp edges.

The depth of the applied dressing must be in accordance with the instructions in the Inspection/Check, refer to TASK 72-41-13-200-001-C00 or TASK 72-41-13-200-001-D00 or TASK 72-41-13-200-001-E00 or TASK 72-41-13-200-001-F00.

There are two alternative procedures to remove the damage. One uses hand tools and the other uses machine tools. You must use the correct materials as shown in the applicable SUBTASK.

Where reference is made to a SUBTASK within a TASK in the form "TASK, SUBTASK" the operator must read and apply the complete TASK. The SUBTASK is listed only when the TASK gives options for the processing of the component. The specified SUBTASK instructs what option must be used during application of the TASK for the successful completion of the Repair Scheme VRS6617.

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

More equipment and materials necessary to do this Repair are in the TASKS given below.
SPM TASK 70-09-00-400-501.
SPM TASK 70-11-39-300-503.
SPM TASK 70-23-03-230-501.
SPM TASK 70-23-04-230-501.

NOTE

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.

NOTE

To identify the consumable materials refer to the Consumable Materials Index (PCI).

NOTE

Other necessary consumable materials are referred to in the SPM TASKS in this TASK.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Fluorescent Penetrant Inspection EquipmentLOCALFluorescent penetrant inspection equipment
Standard workshop equipmentLOCALStandard workshop equipment
Vibro-peen equipmentLOCALVibro-peen equipment
Dimensional inspection equipmentLOCALDimensional inspection equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 05-112 EMERY POLISHING PAPERLOCALCoMat 05-112
CoMat 05-144 WHEEL, BEAR-TEX UNIFIED DEBURRING9K848CoMat 05-144
CoMat 05-145 WHEEL, CLOTH BUFFIAE65CoMat 05-145
CoMat 05-147 WHEEL, RUBBER BONDED GRINDINGLOCALCoMat 05-147
CoMat 05-149 COMPOUND, BUFFING AND POLISHINGIAE65CoMat 05-149
CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)LOCALCoMat 06-022

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-13-220-001 Examine the Damaged Area

    1. Refer to Figure, Figure, Figure and Figure.

      2. Dimensionally inspect the damage.

          1. If the depth of dressing will be greater than 0.04 in. (1.016 mm).

          1. Reject.

          2. If the distance between dressed areas will be less than 3.50 in. (90.00 mm).

          1. Reject.

          3. If the total length of dressed thread will exceed 7.00 in. (177.80 mm).

          1. Reject.

            NOTE

            All existing dress repairs to the threads should be included when calculating the total length of dressed thread.

          4. If the depth of dressing is less than 0.040 in. (1.016 mm), the distance between dressed areas is greater than 3.50 in. (90.00 mm) and the total length of dressed thread will not be in excess of 7.00 in (177.80 mm).

          1. Continue with the repair.

  2. CAUTION

    DRESSING IN ACCORDANCE WITH PART 1 OF VRS6617 MUST ONLY BE DONE WHEN THE INSTRUCTION TO DO SO IS GIVEN IN THE RELEVANT INSPECTION PROCEDURES (IDENTIFIED BY THE APPLICABLE PART NUMBER) LOCATED IN SECTION 72-41-13.

    PART 1: DRESS TO THE DEPTH OF THE DEFECT (1X TIMES THE DEPTH OF THE DEFECT)

    3. SUBTASK 72-41-13-350-001 Remove the Damaged Material (Machine Tool Procedure)

    1. Deleted.

    4. SUBTASK 72-41-13-350-002 Remove Damaged Material (Hand Tool Procedure)

    1. CAUTION

      POWER TOOLS AND HAND HELD POWER TOOLS MUST NOT BE USED TO DRESS THE HP COMPRESSOR REAR SHAFT.

      Refer to Figure, Figure, Figure and Figure.

      2. Dress to remove the damage from the HP Compressor Rear Shaft threads.

      1. Dress to 1X times the depth of the defect.

      2. Where material is removed from a radius or chamfer make sure that the size of the radius or chamfer is not reduced.

      3. It is not necessary to dress to the maximum depth 0.040 in. (1.016 mm) for every defect. Remove the minimum amount of material necessary to remove the defect.

      4. The minimum blend ratio is 50 to 1. Larger blend ratios are acceptable but will reduce the number of defects that can be repaired.

      5. The maximum circumferential length of a single dressed area must not exceed 2.00 in. (50.80 mm).

      6. The combined dressed length of all defects must not exceed 7.00 in. (177.80 mm).

      7. Blend the repair area(s) smooth with the surrounding material.

      8. Use a suitable abrasive stone or paper to remove the damage.

    5. SUBTASK 72-41-13-220-002 Visually and Dimensionally Inspect the Repair Area

    1. Refer to Figure, Figure, Figure and Figure.

      2. Visually inspect the repaired area(s).

        1. Make sure that all defects have been removed.

          1. If any defects remain.

          1. Repeat the repair from Step.

          2. If all defects have been removed.

          1. Continue with the repair.

      3. Dimensionally inspect the repair area(s).

        1. If the dimensions of the repair area(s) are not within the limits given in the referenced figures.

        1. Reject.

        2. If the dimensions of the repair area(s) are not in excess of the limits in the referenced figures.

        1. Continue with the repair.

    6. SUBTASK 72-41-13-110-001 Cold Ferric Chloride Etch

      1. Swab etch the repair area(s) on the HP Compressor Rear Shaft thread.

      1. Refer to SPM TASK 70-11-39-300-503.

    7. SUBTASK 72-41-13-230-001 Fluorescent Penetrant Inspect

      1. Inspect for cracking at the repair area on the HP Compressor Rear Shaft using fluorescent penetrant inspection.

      1. Refer to SPM TASK 70-23-04-230-501.

          1. If cracking is detected.

          1. Reject.

          2. If no cracking is detected.

          1. Continue with the repair.

    8. SUBTASK 72-41-13-350-003 Polish the Repair Area

      CAUTION

      MAKE SURE THAT ALL OF THE BURRS CREATED BY THE REPAIR PROCESS ARE REMOVED.

      1. Polish the etched area(s).

      1. Polish to achieve a surface texture of 126 microinches (3.2 micrometres).

      2. Use a suitable abrasive paper to achieve the required surface finish.

      3. Take care not to remove any more material from the HP Compressor Rear Shaft thread.

    9. SUBTASK 72-41-13-350-004 Identify the Repair

    1. Refer to Figure and Figure.

      NOTE

      If the HP Compressor Rear Shaft is already identified with the repair scheme number VRS6617 from a previous application of the repair scheme, further identification is not necessary.

      2. Vibro-peen VRS6617 at the indicated location(s) on the HP Compressor Rear Shaft.

      1. Refer to SPM TASK 70-09-00-400-501.

      3. Remove raised material, burrs and/or sharp edges at the vibro-peen marking area.

  10. CAUTION

    DRESSING IN ACCORDANCE WITH PART 2 OF VRS6617 MUST ONLY BE DONE WHEN THE INSTRUCTION TO DO SO IS GIVEN IN THE RELEVANT INSPECTION PROCEDURES (IDENTIFIED BY THE APPLICABLE PART NUMBER) LOCATED IN SECTION 72-41-13.

    PART 2: DRESS TO TWICE THE DEPTH OF THE DEFECT (2X TIMES THE DEPTH OF THE DEFECT)

    11. SUBTASK 72-41-13-350-005 Remove Damaged Material (Hand Tool Procedure)

      CAUTION

      POWER TOOLS AND HAND HELD POWER TOOLS MUST NOT BE USED TO DRESS THE HP COMPRESSOR REAR SHAFT.

    1. Refer to Figure, Figure, Figure and Figure.

      2. Dress to remove the damage from the HP Compressor Rear Shaft threads.

      1. Dress to 2X times the depth of the defect.

      2. Where material is removed from a radius or chamfer make sure that the size of the radius or chamfer is not reduced.

      3. It is not necessary to dress to the maximum depth 0.040 in. (1.016 mm) for every defect. Remove the minimum amount of material necessary to remove the defect.

      4. The minimum blend ratio is 50 to 1. Larger blend ratios are acceptable but will reduce the number of defects that can be repaired.

      5. The maximum circumferential length of a single dressed area must not exceed 2.00 in. (50.80 mm).

      6. The combined dressed length of all defects must not exceed 7.00 in. (177.80 mm).

      7. Blend the repair area(s) smooth with the surrounding material.

      8. Use a suitable abrasive medium to remove the damage.

    12. SUBTASK 72-41-13-220-003 Visually and Dimensionally Inspect the Repair Area

    1. Refer to Figure, Figure, Figure and Figure.

      2. Visually inspect the repaired area(s).

        1. Make sure that all defects have been removed.

          1. If any defects remain.

          1. Repeat the repair from Step.

          2. If all defects have been removed.

          1. Continue with the repair.

      3. Dimensionally inspect the repair area(s).

        1. If the dimensions of the repair area(s) are not within the limits given in the references figures.

        1. Reject.

        2. If the dimensions of the repair area(s) are not in excess of the limits in the referenced figures.

        1. Continue with the repair.

    13. SUBTASK 72-41-13-110-002 Swab Etch the Repair Area

      1. Cold ferric chloride swab etch the repair area on the HP Compressor Rear Shaft thread.

      1. Refer to SPM TASK 70-11-39-300-503.

    14. SUBTASK 72-41-13-230-002 Fluorescent Penetrant Inspect

      1. Inspect for cracking at the repair area on the HP Compressor Rear Shaft using fluorescent penetrant inspection.

      1. Refer to SPM TASK 70-23-04-230-501.

          1. If cracking is detected.

          1. Reject.

          2. If no cracking is detected.

          1. Continue with the repair.

    15. SUBTASK 72-41-13-350-006 Polish the Repair Area

      CAUTION

      MAKE SURE THAT ALL OF THE BURRS CREATED BY THE REPAIR PROCESS ARE REMOVED.

      1. Lightly polish the etched area(s).

      1. Polish to achieve a surface texture of 126 microinches (3.2 micrometres).

      2. Use a suitable abrasive paper to achieve the required surface finish.

      3. Take care not to remove any more material from the HP Compressor Rear Shaft thread.

    16. SUBTASK 72-41-13-350-007 Identify the Repair

    1. Refer to Figure and Figure.

      NOTE

      If the HP Compressor Rear Shaft is already identified with the repair scheme number VRS6617 from a previous application of the repair scheme, further identification is not necessary.

      2. Vibro-peen VRS6617 at the indicated location(s) on the HP Compressor Rear Shaft.

      1. Refer to SPM TASK 70-09-00-400-501.

      3. Remove raised material, burrs and/or sharp edges at the vibro-peen marking area.

  17. CAUTION

    DRESSING IN ACCORDANCE WITH PART 3 OF VRS6617 MUST ONLY BE DONE WHEN THE INSTRUCTION TO DO SO IS GIVEN IN THE RELEVANT INSPECTION PROCEDURES (IDENTIFIED BY THE APPLICABLE PART NUMBER) LOCATED IN SECTION 72-41-13.

    PART 3: DRESS TO REMOVE RAISED MATERIAL, BURRS AND SHARP EDGES

    18. SUBTASK 72-41-13-350-008 Remove Raised Material, Burrs and/or Sharp Edges (Hand Tool Procedure)

      CAUTION

      POWER TOOLS AND HAND HELD POWER TOOLS MUST NOT BE USED TO DRESS THE HP COMPRESSOR REAR SHAFT.

    1. Refer to Figure, Figure, Figure and Figure.

      2. Dress to remove the damage from the HP Compressor Rear Shaft threads.

      1. Dress to remove raised material, burrs and sharp edges only.

      2. Do not remove any parent material from the HP Compressor Rear Shaft thread.

      3. Use a suitable abrasive medium to remove the damage.

    19. SUBTASK 72-41-13-220-003 Visually and Dimensionally Inspect the Repair Area

    1. Refer to Figure, Figure, Figure and Figure.

      2. Visually inspect the repaired area(s).

        1. Make sure that all defects have been removed.

          1. If any defects remain.

          1. Repeat the repair from Step.

          2. If all defects have been removed.

          1. Continue with the repair.

    20. SUBTASK 72-41-13-110-003 Swab Etch the Repair Area

      1. Cold ferric chloride swab etch the repair area on the HP Compressor Rear Shaft thread.

      1. Refer to SPM TASK 70-11-39-300-503.

    21. SUBTASK 72-41-13-230-003 Fluorescent Penetrant Inspect

      1. Inspect for cracking at the repair area on the HP Compressor Rear Shaft using fluorescent penetrant inspection.

      1. Refer to SPM TASK 70-23-04-230-501.

          1. If cracking is detected.

          1. Reject.

          2. If no cracking is detected.

          1. Continue with the repair.

    22. SUBTASK 72-41-13-350-009 Polish the Repair Area

      1. Lightly polish the etched area(s).

      1. Polish the repair area(s) to achieve a surface texture of 126 microinches (3.2 micrometres).

      2. Use a suitable abrasive paper to achieve the required surface finish.

      3. Take care not to remove any more material from the HP Compressor Rear Shaft thread.

    23. SUBTASK 72-41-13-350-010 Identify the Repair

    1. Refer to Figure and Figure.

      NOTE

      If the HP Compressor Rear Shaft is already identified with the repair scheme number VRS6617 from a previous application of the repair scheme, further identification is not necessary.

      2. Vibro-peen VRS6617 at the indicated location(s) on the HP Compressor Rear Shaft.

      1. Refer to SPM TASK 70-09-00-400-501.

      3. Remove raised material, burrs and/or sharp edges at the vibro-peen marking area.

    24. Figure: HP Compressor Rear Shaft Thread - Component Section - Assembly A, Assembly B, Assembly C and Assembly D

    HP Compressor Rear Shaft Thread - Component Section - Assembly A, Assembly B, Assembly C and Assembly D

    Figure: HP Compressor Rear Shaft Thread - Repair Location and Dimensions - Assembly A, Assembly B, Assembly C and Assembly D

    HP Compressor Rear Shaft Thread - Repair Location and Dimensions - Assembly A, Assembly B, Assembly C and Assembly D

    Figure: HP Compressor Rear Shaft Thread - Repair Details - Assembly A, Assembly B, Assembly C and Assembly D

    HP Compressor Rear Shaft Thread - Repair Details - Assembly A, Assembly B, Assembly C and Assembly D

    Figure: HP Compressor Rear Shaft Thread - Repair Details and Dimensions - Assembly A, Assembly B, Assembly C and Assembly D

    HP Compressor Rear Shaft Thread - Repair Details and Dimensions - Assembly A, Assembly B, Assembly C and Assembly D

    Figure: HP Compressor Rear Shaft Thread - Identity Marking Locations - Assembly A, Assembly B, Assembly C and Assembly D

    HP Compressor Rear Shaft Thread - Identity Marking Locations - Assembly A, Assembly B, Assembly C and Assembly D

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the general information to define the maximum depth of dressing and the blend ratio. (98VR721C)

Change Type:

Revised the procedure to make it inline with the latest editorial standard. (98VR721C)

Change Type:

Added figure 1 thru figure 5. (98VR721C)

Manufacturer Code:9K848
Enterprise Name:DELETED, SEE CAGE CODE 06565
Manufacturer Code:IAE65
Enterprise Name:DELETED, SEE VENDOR CODE V065V
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:K6835
Supply Number:CoMat 05-112
Type:sp01
Supply Short Name:CoMat 05-112 EMERY POLISHING PAPER
Supply Name:CoMat 05-112 EMERY POLISHING PAPER
Specification Groups:
Doc NumberType
FEPA GRIT SIZE P500 EMERY POLISHING PAPER OR ALUMINUM OXIDE ABRASIVE PAPER
Suppliers:
ManufacturerRemarks
K6835
KC1D9
LOCAL
Manufacturer Code:9K848
Supply Number:CoMat 05-144
Type:sp01
Supply Short Name:CoMat 05-144 WHEEL, BEAR-TEX UNIFIED DEBURRING
Supply Name:CoMat 05-144 WHEEL, BEAR-TEX UNIFIED DEBURRING
Specification Groups:
Doc NumberType
58782
Suppliers:
ManufacturerRemarks
9K848
Manufacturer Code:IAE65
Supply Number:CoMat 05-145
Type:sp01
Supply Short Name:CoMat 05-145 WHEEL, CLOTH BUFF
Supply Name:CoMat 05-145 WHEEL, CLOTH BUFF
Specification Groups:
Doc NumberType
86/82 GRAY
Suppliers:
ManufacturerRemarks
IAE65
Manufacturer Code:LOCAL
Supply Number:CoMat 05-147
Type:sp01
Supply Short Name:CoMat 05-147 WHEEL, RUBBER BONDED GRINDING
Supply Name:CoMat 05-147 WHEEL, RUBBER BONDED GRINDING
Specification Groups:
Doc NumberType
C100-102-CHSC
Suppliers:
ManufacturerRemarks
LOCAL
54916
IE224
Manufacturer Code:V065V
Supply Number:CoMat 05-149
Type:sp01
Supply Short Name:CoMat 05-149 COMPOUND, BUFFING AND POLISHING
Supply Name:CoMat 05-149 COMPOUND, BUFFING AND POLISHING
Specification Groups:
Doc NumberType
No. 1062 WHITE POLISHING COMPOUNDMOCO
Suppliers:
ManufacturerRemarks
V065V
56KR1
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:Dimensional inspection equipment
Tool Name:Dimensional inspection equipment
Manufacturer Code:LOCAL
Tool Number:Fluorescent penetrant inspection equipment
Tool Name:Fluorescent Penetrant Inspection Equipment
Link not Found
Manufacturer Code:LOCAL
Tool Number:Vibro-peen equipment
Tool Name:Vibro-peen equipment