TASK 72-31-11-300-025 LPC Fan Blade - Repair The Damage By Local Material Removal, Repair-025 (VRS1026)

DMC:V2500-A0-72-31-1101-02A-649A-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 72-31-11-300-025 LPC Fan Blade - Repair The Damage By Local Material Removal, Repair-025 (VRS1026)

Effectivity

FIG/ITEM

PART NO.

01-300

6A4700

01-300

6A6521

01-300

6A7614

01-300

6A7654

01-300

6A7655

General

This repair gives the procedure to scallop the leading edge and the trailing edge and to dress the airfoil surface to remove the damage from the LP compressor rotor blade.

Deterioration of SFC and fan balance will occur when fan blades are dressed to this TASK.

The maximum number of dressed blades for a given LP compressor rotor blade set is the equivalent of three blades dressed to the maximum limit. Exceeding this could result in engine vibration of unacceptable limits.

Material of component

PART IDENT

SYMBOL

MATERIAL

LP compressor rotor blade

TFH

Ti-6A1-4V

Price and availability - none

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

Related repairs

LP Compressor Rotor Blade - Repair the Airfoil Surface Finish by Glass Bead Peening (VRS1724). Refer to TASK 72-31-11-300-026 (REPAIR-026).

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Portablegrinding equipmentLOCALPortable grinding equipment
Fluorescent Penetrant Inspection EquipmentLOCALFluorescent penetrant inspection equipment
Chemical cleaning equipmentLOCALChemical cleaning equipment
Vibrating marking pencilLOCALVibrating marking pencil

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 05-019 WATERPROOF SILICON CARBIDELOCALCoMat 05-019
CoMat 05-020 WATERPROOF SILICON CARBIDELOCALCoMat 05-020
CoMat 05-021 WATERPROOF SILICON CARBIDE44197CoMat 05-021
CoMat 05-064 WATERPROOF SILICON CARBIDEK6835CoMat 05-064
CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)LOCALCoMat 06-022

Spares

NONE

Safety Requirements

CAUTION

YOU MUST USE SILICON CARBIDE TYPE ABRASIVE WHEELS, STONES AND PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.

CAUTION

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

CAUTION

DO NOT FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.

Procedure

    1. SUBTASK 72-31-11-230-066 Examine the LP Compressor Rotor Blade Assembly for Cracks

      1. Do a penetrant crack test to find all the damage.

      2. Use fluorescent penetrant inspection equipment.

      3. Refer to the SPM TASK 70-23-04-230-501.

    2. SUBTASK 72-31-11-350-089 Remove the Damage from the LP Compressor Rotor Blade Assembly

      2. CAUTION

        YOU MUST USE SILICON CARBIDE TYPE ABRASIVE WHEELS, STONES AND PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.

        CAUTION

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

        CAUTION

        DO NOT FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.

        Remove the damage on the leading edge, the trailing edge and the airfoil surface.

        1. NOTE

          If the damage is evident in Zone AD, then you must blend parallel with the blade leading edge and trailing edge to remove any material above the repaired area.
          If you blend in Zone AD, then you can only have one scallop in Zone AC. AA and AB may each feature a scallop, independently of the repair of Zone AD and AC.

          Use portable grinding equipment.

        1. Cutaway until all damage is removed.

      3. NOTE

        The last polish is to be in a radial direction.

        Make smooth and polish the repaired area.

        1. Surface finish of the repair must be the same as the adjacent area.

    3. SUBTASK 72-31-11-110-074 Do a Swab Etch

      1. Swab etch the repaired area.

      1. Use chemical cleaning equipment.

      2. Refer to the SPM TASK 70-11-08-300-503.

    4. SUBTASK 72-31-11-230-067 Examine the LP Compressor Rotor Blade Assembly for Cracks

      1. Do a local penetrant crack test on the repaired area.

      1. No cracks are permitted.

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

    5. SUBTASK 72-31-11-220-121 Examine the LP Compressor Rotor Blade Assembly

    2. Visually and dimensionally examine the repaired area.

    6. SUBTASK 72-31-11-220-121 Peen the LP Compressor Rotor Blade Assembly

      1. Glass bead peen the airfoil.

      1. Refer to VRS1724, TASK 72-31-11-300-026 (REPAIR-026).

    7. SUBTASK 72-31-11-350-090 Identify the Repair

      1. CAUTION

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

        Write the repair number, VRS1026, adjacent to the assembly number.

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

    8. Figure: Fan blade - Scalloping limits

    Sheet 1

    Legend
    Fan blade - Scalloping limits

    Sheet 1

    Close

    Figure: Fan blade - Scallop proportions

    Sheet 2

    Legend
    Fan blade - Scallop proportions

    Sheet 2

    Close

    Figure: Fan blade - Blend details

    Sheet 3

    Legend
    Fan blade - Blend details

    Sheet 3

    Close

    Figure: Fan blade - Surface dressing for pressure face and non-pressure face

    Sheet 4

    Legend
    Fan blade - Surface dressing for pressure face and non-pressure face

    Sheet 4

    Close

    Figure: Fault to avoid when blending the edges of blades

    Fault to avoid when blending the edges of blades

    Figure: Typical example of damage before and after scalloping

    Typical example of damage before and after scalloping

    Figure: Fan blade - Leading edge shape

    Sheet 1

    Legend
    Fan blade - Leading edge shape

    Sheet 1

    Close

    Figure: Fan blade - Leading edge shape

    Sheet 2

    Legend
    Fan blade - Leading edge shape

    Sheet 2

    Close

    Figure: Fan blade - Leading edge shape

    Sheet 3

    Legend
    Fan blade - Leading edge shape

    Sheet 3

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:44197
Enterprise Name:SAINT-GOBAIN INDUSTRIAL CERAMICS INC.
BU Name:SAINT-GOBAIN ABRASIVES, INC
Street:ONE NEW BOND STREET
P.O. Box:PO BOX 15008
City:WORCESTER
State:MA
Zip Code:01615-0008
Country:USA
Phone Number:1-508-795-5000
Fax Number:1-508-795-2828
Internet:www.saint-gobain-northamerica.com
Manufacturer Code:K6835
Enterprise Name:MED-LAB LTD
BU Name:MED-LAB LTD
Street:COPELAND ST
City:DERBY
Zip Code:DE1 2PU
Country:GREAT BRITAIN
Phone Number:44-1332-349094
Fax Number:44-1332-371237
Email:sales@med-lab.co.uk
Internet:www.med-lab.co.uk
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:1E1X8
Supply Number:CoMat 05-019
Type:sp01
Supply Short Name:CoMat 05-019 WATERPROOF SILICON CARBIDE
Supply Name:CoMat 05-019 WATERPROOF SILICON CARBIDE
Specification Groups:
Doc NumberType
OMAT: 5/31 (RR REF)WATERPROOF SILICON CARBIDE ABRASIVE PAPER, CAMI GRIT DESIGNATION 400 (ANSI B74.18)
JCR-184 (JAEC REF)
Suppliers:
ManufacturerRemarks
1E1X8
LOCAL
K6835
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:1E1X8
Supply Number:CoMat 05-064
Type:sp01
Supply Short Name:CoMat 05-064 WATERPROOF SILICON CARBIDE
Supply Name:CoMat 05-064 WATERPROOF SILICON CARBIDE
Specification Groups:
Doc NumberType
OMAT: 5/29 (RR REF)WATERPROOF SILICON CARBIDE ABRASIVE PAPER, CAMI GRIT DESIGNATION 600 (ANSI B74.18)
JCR-182 (JAEC REF)
Suppliers:
ManufacturerRemarks
1E1X8
K6835
LOCAL
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:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Fluorescent penetrant inspection equipment
Tool Name:Fluorescent Penetrant Inspection Equipment
Manufacturer Code:LOCAL
Tool Number:Portable grinding equipment
Tool Name:Portablegrinding equipment
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