TASK 72-31-11-300-026 LPC Fan Blade - Repair The Airfoil Surface Finish By Glass/Ceramic Bead Peening, Repair 026 (VRS1724)

DMC:V2500-A0-72-31-1101-01A-635A-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 72-31-11-300-026 LPC Fan Blade - Repair The Airfoil Surface Finish By Glass/Ceramic Bead Peening, Repair 026 (VRS1724)

Effectivity

FIG/ITEM PART NO.

01-300

6A3494

01-300

6A3971

01-300

6A4700

01-300

6A5485

01-300

6A6519

01-300

6A6521

01-300

6A7403

01-300

6A7613

01-300

6A7614

01-300

6A7649

01-300

6A7650

01-300

6A7651

01-300

6A7652

01-300

6A7653

01-300

6A7654

01-300

6A7655

01-300

6A7656

01-300

6A7658

Material of component

PART IDENT

SYMBOL

MATERIAL

LP compressor rotor blades

TFH

Titanium

6 percent Aluminium

4 percent Vanadium

alloy

General

The blade(s) must have had all other repairs completed and be servicable. Refer to TASK 72-31-11-200-000 (INSPECTION/CHECK-000).

This Repair gives the procedure to glass/ceramic bead peen the LP compressor rotor blade(s) to restore the airfoil surface finish.

This Repair can only be carried out on a blade for a maximum of five times.

When a blade airfoil is repaired by glass/ceramic bead peening for the first time/1 is engraved adjacent to the scheme number, /2 for the second time, /3 for the third time, /4 for the fourth time and /5 for the final time.

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

Price and availability - Refer to IAE.

Related repairs

LP Compressor Rotor Blade - Restore the Surface Finish by Vibro-Polishing (VRS1025). Refer to TASK 72-31-11-300-010 (REPAIR-010).

NOTE

For more equipment and materials necessary to do this Repair, refer to the SPM TASK 70-09-00-400-501, SPM TASK 70-11-03-300-503 and SPM TASK 70-38-04-300-503.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Standard equipmentLOCALStandard equipment
Chemical cleaning equipmentLOCALChemical cleaning equipment
Glass/Ceramic bead peening equipmentLOCALGlass/Ceramic bead peening equipment
Vibro-engraving equipmentLOCALVibro-engraving equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-293 GLASS BEADSLOCALCoMat 01-293
CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOFLOCALCoMat 02-003
CoMat 05-184 CERAMIC BEADSIE460CoMat 05-184

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-31-11-220-100 Make Sure that the LP Compressor Rotor Blade(s) can be Glass/Ceramic Bead Peened

      1. Examine the blade root to find if VRS1724 has been completed before.

      1. If VRS1724/5 is engraved adjacent to the part number, the blade cannot be glass/ceramic bead peened and must be discarded.

    2. Examine the blades to make sure that all necessary repairs have been completed.

    2. SUBTASK 72-31-11-110-070 Clean the LP Compressor Rotor Blade(s)

      1. Chemically clean the blade(s).

      1. Refer to the SPM TASK 70-11-03-300-503. Use chemical cleaning equipment.

    3. SUBTASK 72-31-11-380-066 Restore the LP Compressor Rotor Blade(s) Airfoil Surface Finish

      CAUTION

      DO NOT ABRASIVE BLAST THE AIRFOIL SURFACE BEFORE YOU GLASS/CERAMIC BEAD PEEN.

    1. Refer to: Figure

      2. Apply adhesive tape to the LP compressor rotor blade root and areas that are not to be glass/ceramic bead peened.

      3. Make sure the glass/ceramic bead peening equipment can give the parameters.

      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002.

        Use CoMat 01-293 GLASS BEADS or CoMat 05-184 CERAMIC BEADS to get an Almen instensity of 0.015 to 0.020 in. (0.38 to 0.50 mm) on 'N' type test strip.

        A coverage of 200 per cent must be applied.

        Use controlled glass/ceramic bead peening equipment.

    4. Glass/ceramic bead peen the LP compressor rotor blade airfoil to restore the surface finish.

      Glass/Ceramic Bead Peening Data

      Glass bead type

      Ceramic bead type

      Coverage

      200 percent

      Almen intensity

      0.015 to 0.020 in. (0.38 to 0.50 mm) using test strip N

    5. Remove the adhesive tape.

    4. SUBTASK 72-31-11-380-067 Vibro-Polish the LP Compressor Rotor Blade Airfoil

      NOTE

      This procedure is not necessary if surface finish within the limit is achieved. Refer to TASK 72-31-11-200-000 (INSPECTION/CHECK-000).

      1. Vibro-polish the LP compressor rotor blade airfoil.

      1. Refer to VRS1025, TASK 72-31-11-300-010 (REPAIR-010).

    5. SUBTASK 72-31-11-350-081 Identify the Repair

      CAUTION

      DO NOT VIBRO-ENGRAVE ON THE BLADE AIRFOIL OR LOCATION FACES.

      1. Write the repair number, VRS1724, 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.

        If this is the first repair to this scheme, then vibro-engrave /1 adjacent to the scheme number.

        If this is the second repair to this scheme, then vibro-engrave /2 adjacent to the scheme number.

        If this is the third repair to the scheme, then vibro-engrave /3 adjacent to the scheme number.

        If this is the fourth repair to this scheme, then vibro-engrave /4 adjacent to the scheme number.

        If this is the fifth repair to this scheme, then vibro-engrave /5 adjacent to the scheme number.

        NOTE

        The LP compressor rotor blade can only be glass/ceramic bead peened five times.

    6. Figure: Repair details and dimensions

    Repair details and dimensions

    Figure: Repair details and dimensions

    Repair details and dimensions

    Figure: Repair details and dimensions

    Repair details and dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:IE460
Enterprise Name:DELETED. REFER TO VENDOR CODE V460V.
BU Name:DELETED. REFER TO VENDOR CODE V460V.
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-293
Type:sp01
Supply Short Name:CoMat 01-293 GLASS BEADS
Supply Name:CoMat 01-293 GLASS BEADS
Specification Groups:
Doc NumberType
OMAT:1/239SIZE NO.5 (0.0098 to 0.0165IN) CSS 8 VG300 AECMA prEN 2750
JCR-180SIZE NO.5 (0.0098 to 0.0165IN) CSS 8 VG300 AECMA prEN 2750
Suppliers:
ManufacturerRemarks
LOCAL
IE125
07852
IE301
K2769
Manufacturer Code:LOCAL
Supply Number:CoMat 02-003
Type:sp01
Supply Short Name:CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOF
Supply Name:CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOF
Specification Groups:
Doc NumberType
OMAT: 285ISATAPE 160
Suppliers:
ManufacturerRemarks
LOCAL
IE305
K6835
Manufacturer Code:1E1X8
Supply Number:CoMat 05-184
Type:sp01
Supply Short Name:CoMat 05-184 CERAMIC BEADS
Supply Name:CoMat 05-184 CERAMIC BEADS
Specification Groups:
Doc NumberType
ZIRSHOT Z300 (0,3 to 0,425 mm) CERTIFIED TO LATEST REVISION OF AMS2431/7
Suppliers:
ManufacturerRemarks
1E1X8
K6835
KC1D9
V460V
V552V
Manufacturer Code:LOCAL
Tool Number:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Glass/Ceramic bead peening equipment
Tool Name:Glass/Ceramic bead peening equipment
Manufacturer Code:LOCAL
Tool Number:Standard equipment
Tool Name:Standard equipment
Manufacturer Code:LOCAL
Tool Number:Vibro-engraving equipment
Tool Name:Vibro-engraving equipment