TASK 72-41-33-300-023 HPC Stage 4 Variable Stator Vane Shroud - Replace The Dowel Pins, Repair-023 (VRS6677)

DMC:V2500-A0-72-41-3314-01A-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 72-41-33-300-023 HPC Stage 4 Variable Stator Vane Shroud - Replace The Dowel Pins, Repair-023 (VRS6677)

Effectivity

FIG/ITEM

PART NO.

03-200

6A3469

Assembly A

03-200

6A7561

Assembly B

Material of component

PART IDENT

SYMBOL

MATERIAL

HP Compressor Stage 4

Inner Shroud

LJH

Aluminium

Dowel pin

QAL

Nimonic 80A

General

Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.

This repair must only be done when the instruction to do so is given in TASK 72-41-33 Inspection/Check.

This repair has been issued to replace worn pins in the HP compressor stage 4 inner shroud.

The practices and processes referred to in the procedure by the TASK/SUBTASK number are in the 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 70-38-02-300-503

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

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-099 LINT-FREE CLOTHLOCALCoMat 02-099
CoMat 03-026 LIQUID NITROGENLOCALCoMat 03-026

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Retaining RingAS20762
Dowel PinLK41751
Retaining RingAS20762
Dowel PinAS20743

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-33-020-001-A00 Remove the Dowel Pins, Assembly A

    1. Refer to Figure and Figure.

      2. Remove the half shrouds from each other.

      1. Make a note of the position of the correlation marks of the matched set.

      3. Remove the worn dowel pins.

      1. Remove the pins with a drift and discard the pins.

      4. Remove the sharp edges around the location holes.

      1. Use hand tools.

      5. WARNING

        BE CAREFUL WHEN YOU USE COMPRESSED AIR. PUT ON PROTECTIVE CLOTHING AND GOGGLES. MAKE SURE THAT ALL PERSONS ARE AT A SAFE DISTANCE.

        Clean the holes.

      1. Use CoMat 02-099 LINT-FREE CLOTH and blast with clean dry compressed air.

    2. SUBTASK 72-41-33-020-001-B00 Remove the Dowel Pins, Assembly B

    1. Refer to Figure and Figure.

      2. Remove the half shrouds from each other.

      1. Make a note of the position of the correlation marks of the matched set.

      3. Remove the worn dowel pins.

      1. Remove the pins with a drift and discard the pins.

      4. Remove the sharp edges around the location holes.

      1. Use hand tools.

      5. WARNING

        BE CAREFUL WHEN YOU USE COMPRESSED AIR. PUT ON PROTECTIVE CLOTHING AND GOGGLES. MAKE SURE THAT ALL PERSONS ARE AT A SAFE DISTANCE.

        Clean the holes.

      1. Use CoMat 02-099 LINT-FREE CLOTH and blast with clean dry compressed air.

    3. SUBTASK 72-41-33-220-211-A00 Examine the Holes, Assembly A

    1. Refer to Figure and Figure.

      2. Do a visual and dimensional inspection.

      1. Make sure the fits and clearances for the pins are satisfactory.

        Examine the holes for burred edges or scoring. Reject the part if damage is found.

        Examine the rear shroud interference fit dowel hole for wear. If the diameter of the hole is between 0.1963 to 0.1970 in. (4.987 to 5.005 mm) continue with the repair.

        Reject the part if the diameter is more than to 0.1970 in. (5.005 mm).

        Examine the front shroud clearance fit dowel hole for wear. If the diameter of the hole is between 0.200 to 0.201 in. (5.07 to 5.10 mm) continue with the repair.

        Reject the part if the diameter is more than 0.201 in. (5.10 mm).

    4. SUBTASK 72-41-33-220-211-B00 Examine the Holes, Assembly B

    1. Refer to Figure and Figure.

      2. Do a visual and dimensional inspection.

      1. Make sure the fits and clearances for the pins are satisfactory.

        Examine the holes for burred edges or scoring. Reject the part if damage is found.

        Examine the rear shroud interference fit dowel hole for wear. If the diameter of the hole is between 0.1963 to 0.1970 in. (4.987 to 5.005 mm) continue with the repair.

        Reject the part if the diameter is more than 0.1970 in. (5.005 mm).

        Examine the front shroud clearance fit dowel hole for wear. If the diameter of the hole is between 0.200 to 0.201 in. (5.07 to 5.10 mm) continue with the repair.

        Reject the part if the diameter is more than 0.201 in. (5.10 mm).

    5. SUBTASK 72-41-33-450-001-A00 Replace the Dowel Pins, Assembly A

    1. Refer to Figureand Figure.

      2. Install the retaining rings to the dowel pins.

      1. Push the retaining ring over the pin until it engages in the groove.

      3. WARNING

        DO NOT GET LIQUID NITROGEN ON YOUR SKIN OR IN YOUR EYES. PUT ON PROTECTIVE CLOTHING, GLOVES, GOGGLES AND A MASK. LIQUID NITROGEN IS AN ASPHYXIATOR. USE THE LIQUID IN A WELL VENTILATED AREA. IF YOU GET THE LIQUID ON YOUR SKIN OR IN YOUR EYES, FLUSH IT AWAY WITH WATER. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.

        Install the dowel pins into the half shrouds.

      1. Freeze the pins with CoMat 03-026 LIQUID NITROGEN.

        Use an applicable installation tool to install the pins in position.

        Use heat-protection gloves.

      4. Replace the half shrouds.

      1. Assemble the half shrouds together.

        Make sure the correlation marks are aligned.

    6. SUBTASK 72-41-33-450-001-B00 Replace the Dowel Pins, Assembly B

    1. Refer to Figureand Figure.

      2. Install the retaining rings to the dowel pins.

      1. Push the retaining ring over the pin until it engages in the groove.

      3. WARNING

        DO NOT GET LIQUID NITROGEN ON YOUR SKIN OR IN YOUR EYES. PUT ON PROTECTIVE CLOTHING, GLOVES, GOGGLES AND A MASK. LIQUID NITROGEN IS AN ASPHYXIATOR. USE THE LIQUID IN A WELL VENTILATED AREA. IF YOU GET THE LIQUID ON YOUR SKIN OR IN YOUR EYES, FLUSH IT AWAY WITH WATER. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.

        Install the dowel pins into the half shrouds.

      1. Freeze the pins with CoMat 03-026 LIQUID NITROGEN.

        Use an applicable installation tool to install the pins in position.

        Use heat-protection gloves.

      4. Replace the half shrouds.

      1. Assemble the half shrouds together.

        Make sure the correlation marks are aligned.

    7. SUBTASK 72-41-33-350-086 Identify the Repair

      CAUTION

      MAKE SURE YOU KEEP THE INNER SHROUD RING ASSEMBLIES TOGETHER AS A MATCHED SET.

      1. Make a mark VRS6677 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.

    8. SUBTASK 72-41-33-380-060 Apply the Surface Protection

      1. Locally touch up the repaired area(s).

      1. Refer to the SPM TASK 70-38-02-300-503.

    9. Figure: Repair Details and Dimensions - Assembly A

    Sheet 1

    Legend
    Repair Details and Dimensions - Assembly A

    Sheet 1

    Close

    Figure: Repair Details and Dimensions - Assembly A

    Sheet 2

    Legend
    Repair Details and Dimensions - Assembly A

    Sheet 2

    Close

    Figure: Repair Details and Dimensions - Assembly B

    Sheet 1

    Legend
    Repair Details and Dimensions - Assembly B

    Sheet 1

    Close

    Figure: Repair Details and Dimensions - Assembly B

    Sheet 2

    Legend
    Repair Details and Dimensions - Assembly B

    Sheet 2

    Close

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:X222X
Supply Number:CoMat 02-099
Type:sp01
Supply Short Name:CoMat 02-099 LINT-FREE CLOTH
Supply Name:CoMat 02-099 LINT-FREE CLOTH
Specification Groups:
Doc NumberType
WHERE COMAT 02-099 IS SPECIFIED WITH NO SUFFIX, USE COMAT 02-099A OR COMAT 02-099B.
Suppliers:
ManufacturerRemarks
X222X
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
Link not Found