TASK 72-41-34-300-008 HPC Stage 5 Unison Ring Connector Bridges - Blend Repair, Repair-008 (VRS6198)

DMC:V2500-A0-72-41-3435-00A-649A-C|Issue No:002.00|Issue Date:2021-02-01

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 72-41-34-300-008 HPC Stage 5 Unison Ring Connector Bridges - Blend Repair, Repair-008 (VRS6198)

Effectivity

FIG/ITEM

PART NO.

05-200

6A7898

05-200

6A8080

Material of component

PART IDENT

MATERIAL

Bridge piece

Titanium alloy

Bush

Graphite/polymide

General

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

The HP compressor stage 5 bridge piece assembly, repaired to this procedure must be as near as possible to their initial shape and surface condition.

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

Refer to VRS6202, TASK 72-41-34-300-027 (REPAIR-027) for the procedure to replace any damaged bushes.

Price and Availability

Refer to International Aero Engines

Related Repairs - None

NOTE

Equipment and materials necessary to do this repair are given in SPM TASKs given below:
SPM TASK 70-11-08-300-503
SPM TASK 70-11-26-300-503
SPM TASK 70-23-01-230-501
SPM TASK 70-23-05-230-501
SPM TASK 70-35-03-300-501

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
Penetrant Crack Test EquipmentLOCALPenetrant crack test equipment
Standard Workshop EquipmentLOCALStandard Workshop Equipment
Workshop inspection equipmentLOCALWorkshop inspection equipment
Vibro-engraving equipmentLOCALVibro-engraving equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 05-020 WATERPROOF SILICON CARBIDE1E1X8CoMat 05-020
CoMat 05-021 WATERPROOF SILICON CARBIDE1E1X8CoMat 05-021
CoMat 05-141 ABRASIVE STONE SILICON CARBIDELOCALCoMat 05-141
CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)X222XCoMat 06-063

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-34-110-135 Chemically Clean

      1. Chemically clean.

      1. Refer to TASK 72-41-34-100-000 (CLEANING-000).

        Use chemical cleaning equipment.

    2. SUBTASK 72-41-34-230-075 Do a Crack Test

      1. Do a penetrant crack test.

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

        Use penetrant crack test equipment.

        Cracks are not permitted.

    3. SUBTASK 72-41-34-350-052 Remove the Damage

      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 - MAXIMUM SPEED FOR MECHANICAL TOOLS MUST NOT BE MORE THAN 1000 REVOLUTIONS PER MINUTE.

      CAUTION

      TITANIUM COMPONENT - YOU MUST MAKE SURE THAT WHEN YOU REMOVE MATERIAL, BLEND AND POLISH, TO MAKE SMOOTH, NO SPARKS ARE PRODUCED.

      CAUTION

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

    1. Refer to Figure.

      2. Remove area(s) of damage as necessary.

      1. Refer to the SPM TASK 70-35-03-300-501.

        The maximum depth to remove the damage must not be more than 0.005 in. (0.13 mm).

        The diameter of the area removed must be 50 times its depth.

        Use standard workshop equipment.

      3. Blend to smooth the damage area(s).

      1. Refer to the SPM TASK 70-35-03-300-501.

        Make sure the damage marks are fully removed and the area is made smooth to the adjacent material.

        Use standard workshop equipment.

      4. Polish the repaired area(s).

      1. Refer to the SPM TASK 70-35-03-300-501.

        Polish the repaired area to remove the scratches and to give a surface finish the same as the adjacent material.

    4. SUBTASK 72-41-34-110-137 Chemically Clean

      1. Chemically clean.

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

        Use chemical cleaning equipment.

    5. SUBTASK 72-41-34-220-182 Examine the Repair

    1. Refer to Figure.

      2. Do a visual and dimensional inspection of the repaired area(s).

      1. Make sure the surface finish is the same as the adjacent material.

        The maximum depth of the repair must not be more than 0.005 in. (0.13 mm).

        Use workshop inspection equipment.

    6. SUBTASK 72-41-34-110-136 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.

    7. SUBTASK 72-41-34-230-076 Do a Crack Test

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

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

        Cracks are not permitted.

    8. SUBTASK 72-41-34-350-191 Identify the Repair

      1. Vibro-engrave VRS6198 on the part 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.

    9. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised effectivity table. (20VG080)

Manufacturer Code:1E1X8
Enterprise Name:SAINT-GOBAIN CERAMICS AND PLASTICS, INC
BU Name:SAINT-GOBAIN CERAMICS AND PLASTICS, INC
Street:1 NEW BOND ST
City:WORCESTER
State:MA
Zip Code:01606
Country:UNITED STATES OF AMERICA
Phone Number:1-508-795-5000, 1-800-243-0028
Fax Number:1-508-795-2380
Internet:www.saint-gobain-northamerica.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X222X
Enterprise Name:N/A – REFER TO APPLICABLE COMAT SUFFIX
Manufacturer Code:1E1X8
Supply Number:CoMat 05-020
Type:sp01
Supply Short Name:CoMat 05-020 WATERPROOF SILICON CARBIDE
Supply Name:CoMat 05-020 WATERPROOF SILICON CARBIDE
Specification Groups:
Doc NumberType
OMAT: 5/33 (RR REF)WATERPROOF SILICON CARBIDE ABRASIVE PAPER, CAMI GRIT DESIGNATION 320 (ANSI B74.18)
JCR-027 (JAEC REF)
JCR-186 (JAEC REF)
Suppliers:
ManufacturerRemarks
1E1X8
LOCAL
K6835
Manufacturer Code:1E1X8
Supply Number:CoMat 05-021
Type:sp01
Supply Short Name:CoMat 05-021 WATERPROOF SILICON CARBIDE
Supply Name:CoMat 05-021 WATERPROOF SILICON CARBIDE
Specification Groups:
Doc NumberType
OMAT: 5/35 (RR REF)WATERPROOF SILICON CARBIDE ABRASIVE PAPER, CAMI GRIT DESIGNATION 240 (ANSI B74.18 )
JCR-188 (JAEC REF)
Suppliers:
ManufacturerRemarks
1E1X8
K6835
LOCAL
Manufacturer Code:LOCAL
Supply Number:CoMat 05-141
Type:sp01
Supply Short Name:CoMat 05-141 ABRASIVE STONE SILICON CARBIDE
Supply Name:CoMat 05-141 ABRASIVE STONE SILICON CARBIDE
Specification Groups:
Doc NumberType
OMAT: 5/112FJF 44 SQUARE-FINE, SS-S-736/3/21, TYPE II CLASS A2
Suppliers:
ManufacturerRemarks
LOCAL
06565
42736
A2549
IE216
IE302
K3895
K6835
Manufacturer Code:X222X
Supply Number:CoMat 06-063
Type:sp01
Supply Short Name:CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)
Supply Name:CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)
Specification Groups:
Doc NumberType
It is not permitted to mix the selected CoMat 06‐063 letter suffix material with other CoMat 06‐063 letter suffix materials. Where CoMat 06‐063 is specified with no suffix, use one of the CoMat 06‐063 letter suffix materials.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:LOCAL
Tool Number:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Penetrant crack test equipment
Tool Name:Penetrant Crack Test Equipment
Manufacturer Code:LOCAL
Tool Number:Standard Workshop Equipment
Tool Name:Standard Workshop Equipment
Manufacturer Code:LOCAL
Tool Number:Vibro-engraving equipment
Tool Name:Vibro-engraving equipment
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment