TASK 72-00-31-300-004 LPC Fan Blade - Blend Repair, Repair-004 (VRS1050)

DMC:V2500-A0-72-00-3104-01A-649A-B|Issue No:001.00|Issue Date:2014-05-01

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 72-00-31-300-004 LPC Fan Blade - Blend Repair, Repair-004 (VRS1050)

General

This repair gives the procedure to scallop the leading edge 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.

This repair can only be used on the LP compressor (fan) module, with the fan blades still assembled in position.

Fan blades repaired to this scheme must be glass bead peened at the next shop visit. Glass bead peening instructions are specified in VRS1724.

Material of component

PART IDENT

SYMBOL

MATERIAL

LP compressor rotor blade

TFH

Ti-6A1-4V

Price and availability - none

A log book entry is necessary when you complete this repair.

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

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

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 72-00-31-230-055 Examine the LP Compressor Rotor Blade Assembly for Cracks

      2. Do a local penetrant crack test to find all the damage.

    2. SUBTASK 72-00-31-350-051 Remove the Damage from the LP Compressor Rotor Blade Assembly

      1. 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 and the airfoil surface.

      1. Cutaway until all damage is removed.

      2. NOTE

        1. If the damage is evident in Zone AD, then you must blend parallel with the blade leading edge, to remove any material above the repaired area.

        2. If you blend in Zone AD, then you can have one scallop in Zone AC. AA and AB may each feature a scallop, independently of the repair of Zone AD and AC.

        Make smooth and polish the repaired area.

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

    3. NOTE

      The last polish is to be in a radial direction.

    3. SUBTASK 72-00-31-110-054 Do a Swab Etch

      1. Swab etch the repaired area.

    4. SUBTASK 72-00-31-230-056 Examine the LP Compressor Rotor Blade Assembly for Cracks

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

    5. SUBTASK 72-00-31-220-067 Examine the LP Compressor Rotor Blade Assembly

    1. Refer to Figure, Figure, Figure, Figure and Figure.

    2. Visually and dimensionally examine the repaired area.

    6. SUBTASK 72-00-31-350-052 Identify the Repair

    1. Record the location number of the repaired fan blade and the repair number, VRS1050 in the engine log book.

    2. NOTE

      Fan blades repaired to this scheme must be glass peened at the next shop visit. Refer to paragraph 2 General,

    7. Figure: Fan blade - scalloping limits

    Fan blade - scalloping limits

    Figure: Fan blade - blend details

    Fan blade - blend details

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

    Fan blade - surface dressing for pressure face and non-pressure face

    Figure: Fault to avoid when blending the edge of the blades

    Fault to avoid when blending the edge of the blades

    Figure: Typical example of damage before and after scalloping

    Typical example of damage before and after scalloping

    Figure: Fan blade - leading edge shape

    Fan blade - leading edge shape

    Figure: Fan blade - leading edge shape

    Fan blade - leading edge shape

    Figure: Fan blade - leading edge shape

    Fan blade - leading edge shape

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
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Portable grinding equipment
Tool Name:Portablegrinding equipment