TASK 72-41-34-300-020 HPC Unison Ring Control Rod Connectors - Replace The Bushes (Stage 4 Through 6), Repair-020 (VRS6238)

DMC:V2500-A0-72-41-3451-00A-920A-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 72-41-34-300-020 HPC Unison Ring Control Rod Connectors - Replace The Bushes (Stage 4 Through 6), Repair-020 (VRS6238)

Effectivity

FIG/ITEM PART NO.

04-360

6A2611

05-360

6A3688

06-360

6A2607

Material of component

RR

DESCRIPTION SYMBOL MATERIAL

Variable stator vane

TAB

Titanium copper

control rod connector

alloy

assembly, stage 4, 5

and 6

Bush

EAK

Modified 12 percent

chromium steel

General

This Repair must only be done when the instruction to do so is given in TASK 72-41-34 (INSPECTION).

This Repair instructs the replacement of standard or oversize bushes in the stage 4, 5 and 6 variable stator vane control rod connector assembly, as necessary.

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

Price and availability

Refer to International Aero Engines

NOTE

Equivalent materials or equipment can be used.

NOTE

More 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 70-23-02-230-501

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
Penetrant Crack Test EquipmentLOCALPenetrant crack test equipment
Boring machineLOCALBoring machine
Chemical cleaning equipmentLOCALChemical cleaning equipment
Heat protection glovesLOCALHeat protection gloves
Milling machineLOCALMilling machine
Vibro-engraving equipmentLOCALVibro-engraving equipment

Consumables, Materials and Expendables

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

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Bush - Standard - Assy A6A43612
Bush - Oversize - Assy A6A43622

(0.005in (0.127 mm))

Bush - Oversize - Assy A6A43632

(0.010in (0.254 mm))

Bush - Standard - Assy B6A43612
Bush - Oversize - Assy B6A43622

(0.005in (0.127 mm))

Bush - Oversize - Assy B6A43632

(0.010in (0.254 mm))

Bush - Standard - Assy C6A43612
Bush - Oversize - Assy C6A43622

(0.005in (0.127 mm))

Bush - Oversize - Assy C6A43632

(0.010in (0.254 mm))

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-34-350-100 Remove Worn Bush(es)

    1. Refer to: Figure, Figure and Figure

      2. Remove worn or damaged bush(es), as necessary.

      1. Use standard workshop equipment to pull out the bush(es).

    2. SUBTASK 72-41-34-230-095 Do a Crack Test

      1. Do a penetrant crack test on the bush location bore(s).

      1. Refer to the SPM TASK 70-23-02-230-501.

        Use penetrant crack test equipment.

    3. SUBTASK 72-41-34-220-233 Examine the Bush Location Bore(s)

    2. Visually examine the crack tested bore(s).

      3. Cracked.

      1. Refer to Step and machine oversize.

      4. Cracked in the 0.4830in (12.2675 mm) oversize bore(s).

      1. Discard.

      5. Measure the dimensions of the bush location bore(s).

        1. If there is an interference limit of 0.00024 to 0.00173in (0.006 to 0.044 mm) on the diameter of the bore(s).

        1. Refer to Step.

          Install a standard size bush.

        2. If you cannot get the interference at (1) above.

        1. Refer to Step and machine oversize.

    4. SUBTASK 72-41-34-320-051 Machine the Bore(s) Oversize

      2. Install the variable stator vane control rod connector assembly, stage 4, 5 or 6 on to the machine.

      1. Safety in position.

        Use a precision boring machine.

      3. Machine the bore(s) oversize as necessary.

      1. Use standard workshop equipment.

        NOTE

        1. A bore that does not clean up to give the necessary finish and correct interference limit on the diameter, when you install the bush(es), must be machined to the next oversize.

        2. A high quality finish free from tool marks is necessary.

      4. Remove the sharp edges.

      1. Use standard workshop equipment.

    5. SUBTASK 72-41-34-110-068 Clean the Variable Stator Vane Control Rod Connector Assembly

      1. Chemically clean the variable stator vane control rod connector assembly, stage 4, 5 or 6, as necessary.

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

        Use chemical cleaning equipment.

    6. SUBTASK 72-41-34-230-096 Do a Crack Test

      1. Do a penetrant crack test on the machined bore(s).

      1. Refer to the SPM TASK 70-23-02-230-501.

        Use penetrant crack test equipment.

    7. SUBTASK 72-41-34-220-234 Examine the Machined Bore(s)

    2. Visually examine the crack tested bore(s).

      3. Cracked.

      1. Do again Step.

        Machine bore(s) to the next oversize.

      4. Cracked in the 0.4830in (12.2675 mm) oversize bore(s).

      1. Discard.

      5. Measure the dimensions of the bore(s) in the variable stator vane control rod connector assembly, stage 4, 5 or 6.

      1. Refer to Figure, Figure or Figure.

        Make sure there will be an interference limit of 0.00024 to 0.00173in (0.006 to 0.044 mm), during assembly.

    8. SUBTASK 72-41-34-350-101 Install Standard or Oversize Bush(es)

    1. Refer to: Figure, Figure and Figure

      2. Freeze and install standard or oversize bush(es) in the variable stator vane control rod connector assembly stage 4, 5 or 6, as necessary.

      1. Use standard workshop equipment, with heat protective gloves.

      3. Assembly A.

      1. Use 6A4361 2 off or 6A4362 2 off or 6A4363 2 off, as necessary.

      4. Assembly B.

      1. Use 6A4361 2 off or 6A4362 2 off or 6A4363 2 off, as necessary.

      5. Assembly C.

      1. Use 6A4361 2 off or 6A4362 2 off or 6A4363 2 off, as necessary.

    9. SUBTASK 72-41-34-220-235 Examine the Bush(es) for Location

    1. Refer to: Figure, Figure and Figure

      2. Visually examine the bush(es) for location.

      1. Make sure the bush(es) are pushed fully into position.

    10. SUBTASK 72-41-34-320-052 Machine the Bush(es) to Length

      2. Install the variable stator vane control rod connector assembly, stage 4, 5 or 6 on to the machine.

      1. Safety in position.

        Use a milling machine.

      3. Machine the bush(es) length to the dimensions shown in the Figs.

      1. Use standard workshop equipment.

      4. Remove sharp edges.

      1. Use standard workshop equipment.

    11. SUBTASK 72-41-34-110-069 Clean the Variable Stator Vane Control Rod Connector Assembly

      1. Chemically clean the variable stator vane control rod connector assembly, stage 4, 5 or 6, as necessary.

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

        Use chemical cleaning equipment.

    12. SUBTASK 72-41-34-220-236 Examine the Bush(es)

    1. Refer to: Figure, Figure and Figure

    2. Measure the dimensions of the bush(es) length, when installed in the variable stator vane control rod connector assembly, stage 4, 5 or 6.

    13. SUBTASK 72-41-34-350-102 Identify the Repair

    1. Refer to: Figure, Figure and Figure

      2. Make a mark VRS6238 adjacent to the part number together with the correct suffix letter for the oversize bush(es) installed.

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

        Use vibro-engraving equipment.

    14. Figure: Repair details and dimensions - Assembly A

    Repair details and dimensions - Assembly A

    Figure: Repair details and dimensions - Assembly A

    Repair details and dimensions - Assembly A

    Figure: Repair details and dimensions - Assembly A

    Repair details and dimensions - Assembly A

    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 - Assembly B

    Repair details and dimensions - Assembly B

    Figure: Repair details and dimensions - Assembly B

    Repair details and dimensions - Assembly B

    Figure: Repair details and dimensions - Assembly B

    Repair details and dimensions - Assembly B

    Figure: Repair details and dimensions - Assembly C

    Repair details and dimensions - Assembly C

    Figure: Repair details and dimensions - Assembly C

    Repair details and dimensions - Assembly C

    Figure: Repair details and dimensions - Assembly C

    Repair details and dimensions - Assembly C

    Figure: Repair details and dimensions - Assembly C

    Repair details and dimensions - Assembly C

Requirements After Job Completion

Follow-On Conditions

NONE
Link not Found
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
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: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:Heat protection gloves
Tool Name:Heat protection gloves
Manufacturer Code:LOCAL
Tool Number:Milling machine
Tool Name:Milling machine
Manufacturer Code:LOCAL
Tool Number:Penetrant crack test equipment
Tool Name:Penetrant Crack Test Equipment
Link not Found
Manufacturer Code:LOCAL
Tool Number:Vibro-engraving equipment
Tool Name:Vibro-engraving equipment