TASK 72-31-11-300-024 LPC Fan Blade - Restore Fatigue Strength Of The Root By Shot Peening, Repair 024 (VRS1723)

DMC:V2500-A0-72-31-1101-00A-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 72-31-11-300-024 LPC Fan Blade - Restore Fatigue Strength Of The Root By Shot Peening, Repair 024 (VRS1723)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

01-300

6A3494

A

01-300

6A3971

A

01-300

6A5485

B

01-300

6A4700

B

01-300

6A6519

B

01-300

6A6521

B

01-300

6A7656

B

01-300

6A7403

B

01-300

6A7613

C

01-300

6A7614

C

01-300

6A7651

C

01-300

6A7652

C

01-300

6A7653

C

01-300

6A7654

C

01-300

6A7655

C

01-300

6A7658

C

01-300

6A7649

D

01-300

6A7650

D

Material of component

PART IDENT

IAE

SYMBOL

MATERIAL

LP compressor rotor blades

TFH

Titanium

6 per cent Aluminium

4 per cent Vanadium alloy

General

This repair must only be done when the instruction to do so is given in 72-31-11 Inspection/Check, and/or SBE 72-0384

For Assembly C and Assembly D blades (post SB72-0375 and SB72-0384), make sure that the metal spray coating (Metco 58) has been removed before you carry out this Repair, refer to VRS1067 TASK 72-31-11-300-032.

To put back the surface condition on the dovetail root of the LP Compressor rotor blade(s), it is necessary to shot peen.

The shot peen part of this Repair requires to be source demonstrated and can only be done by approved vendors.

This repair can only be done four times on a blade root. When a blade root is shot peened for the first time to this repair, a code letter A is put on the blade adjacent to the part number, then B for the second time, C for the third time and finally D for the fourth time.

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

Price and availability - refer to IAE

Related repairs

LP Compressor Blades and Fillers - Replace the Chocking Pads, refer to VRS1028 TASK 72-31-11-300-013 (REPAIR-013) and VRS1022 TASK 72-31-11-300-009 (REPAIR-009).

LP Compressor Blades and Fillers - Replace the Dry Film Lubricant, refer to VRS1021 TASK 72-31-11-300-011 (REPAIR-011) and VRS1023 TASK 72-31-11-300-021 (REPAIR-021).

LP Compressor Blade - Remove and Replace the Metal Spray Coating on the Dovetail Working Flanks, refer to TASK 72-31-11-300-032 (VRS1067)

Repair Facilities

Only the shot peening part of this Repair requires Source Demonstration. This means that any facility not authorised to shot peen should either use the Authorized Repair Vendor in B. that follows or contact the IAE Repair Services Group to determine if a qualification program can be initiated at their facility.

IAE - INTERNATIONAL AERO ENGINES AG
C/O ROLLS-ROYCE PLC
P.O. BOX 31
DERBY DE14 8BJ
ENGLAND
ATTN: REPAIR SERVICES MANAGER
The Authorized Repair Vendor for the shot peening portion of VRS1723 is shown below:
METAL IMPROVEMENT COMPANY INC
DERBY DIVISION (UK)
ASCOT DRIVE
DERBY DE2 8ST
ENGLAND
ATTN: DIVISION MANAGER
GKN AEROSPACE CHEM-TRONICS INC
1150 WEST BRADLEY
EL CAJON
CA 92020
USA
ATTN: DIVISION MANAGER
HONG KONG AERO ENGINE SERVICES LIMITED (HAESL)
70 CHUN CHOI STREET
TSEUNG KWAN O INDUSTRIAL ESTATE
TSEUNG KWAN O
NEW TERRITORIES
HONG KONG
ATTN: DIVISION MANAGER
MTU MAINTENANCE GMBH
FLUGHAFEN HANNOVER
MUNCHER STRASSE 31
30855 LANGENHAGEN
GERMANY
ATTN: DIVISION MANAGER
SERMATECH REPAIR SERVICES LTD
HIGH HOLBORN ROAD
CODNOR
RIPLEY
DERBYSHIRE DE5 3NW
ATTN: DIVISION MANAGER
IHI corporation
229 TONOGAYA MIZUHO-MACHI, NISHITAMA-GUN,
TOKYO 190-1297
JAPAN
ATTN: CUSTOMER SUPPORT MANAGER, MAINTENANCE DEPARTMENT, CIVIL AERO-ENGINE DIVISION, AERO-ENGINE AND SPACE OPERATIONS
Tel: 81-42-568-7362
Fax: 81-42-568-7566
LUFTHANSA TECHNIK AG
POSTFACH 63 03 00
D-22313 HAMBURG
GERMANY
ATTN: DIVISION MANAGER
The designation by IAE of an Authorized Repair Vendor indicates that the Repair Vendor has demonstrated the necessary capability to enable it to carry out the listed repair work. However, IAE makes not warranties or representations concerning the qualifications or quality standards of the Repair Vendors to carry out the repair work and accepts no responsibility whatsoever for any work that may be carried out by a Repair Vendor other than when IAE is listed as the Repair Vendor. Authorized Repair Vendors do not act as agents or representatives of IAE.
NOTE
To identify the consumable materials, refer to the PCI.
NOTE
Special tools are identified in the procedure by the primary tool number.
Preliminary Requirements
Pre-Conditions
NONE
Support Equipment
NameManufacturerPart Number / IdentificationQuantityRemark
Chemical cleaning equipmentLOCALChemical cleaning equipment
Standard workshop equipmentLOCALStandard workshop equipment
Controlled shot peening equipmentLOCALControlled shot peening equipment
Vibro-engraving equipmentLOCALVibro-engraving equipment
IAE 3R19129 Dummy blade0AM53IAE 3R191291
Consumables, Materials and Expendables
NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOFLOCALCoMat 02-003
CoMat 05-028 METALLIC SHOT (CAST STEEL), S230IE249CoMat 05-028
Spares
NONE
Safety Requirements
NONE
Procedure
    1. SUBTASK 72-31-11-350-112 Remove the Chocking Pads from the LP Compressor Rotor Blade(s)
    1. Remove the chocking pads from the dovetail root of the blade.
      2. For Assembly A and Assembly D
      1. Refer to VRS1028 TASK 72-31-11-300-013 (REPAIR-013)
      3. For Assembly B and Assembly C
      1. Refer to VRS1022 TASK 72-31-11-300-009 (REPAIR-009)
    2. SUBTASK 72-31-11-110-071 Clean the LP Compressor Rotor Blade(s)
      1. Chemically clean the blade to remove dry film lubricant.
      1. Refer to TASK 72-31-11-100-000 (CLEANING-000).
        Use chemical cleaning equipment.
    3. SUBTASK 72-31-11-340-004 Remove the Metal Spray Coating, Assembly C and Assembly D
      CAUTION
      MAKE SURE THAT THE METAL SPRAY COATING HAS BEEN REMOVED BEFORE PROCEEDING.
      1. Chemically clean the blade(s) to remove the metal spray.
      1. Refer to VRS1067 TASK 72-31-11-300-032 (REPAIR-032).
        Use chemical cleaning equipment.
    4. SUBTASK 72-31-11-220-101-A00 Examine the LP Compressor Rotor Blade, Assembly A and Assembly D
    1. Refer to: Figure and Figure
      2. Visually examine the dovetail root of the blade to make sure that shot peening has not been done before.
      1. Look for the code symbol adjacent to the part number.
        Reject the rotor blade if you see the code symbol with letter "D".
        The rotor blade cannot be shot peened again.
    3. Visually examine and measure the dimensions of the dovetail root of the blade.
      4. Galled.
        1. Between 0.003 in. and 0.006 in. (0.076 mm to 0.152 mm)
        1. Do SUBTASK 72-31-11-350-084
        2. More than in Step
        1. Reject
    5. SUBTASK 72-31-11-220-101-B00 Examine the LP Compressor Rotor Blade(s), Assembly B and Assembly C
    1. Refer to: Figure and Figure
      2. Visually examine the dovetail root of the blade to make sure that shot-peening has not been done before.
      1. Look for the code symbol adjacent to the part number.
        Reject the rotor blade if you see the code symbol with letter "D".
        The rotor blade cannot be shot peened again.
    3. Visually examin and measure the dimensions of the dovetail root, of the LP Compressor rotor blade(s).
      4. Galled.
        1. Between 0.003 in. to 0.006 in. (0.076 to 0.152 mm).
        1. Do SUBTASK 72-31-11-350-084.
        2. More than in Step.
        1.  Reject.
    6. SUBTASK 72-31-11-350-084-A00 Remove the Highspots, Galling and/or Burrs from the LP Compressor Rotor Blade, Assembly A and Assembly D
      CAUTION
      TITANIUM COMPONENT - YOU MUST USE SILICON CARBIDE TYPE ABRASIVE WHEELS, STONES AND PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.
      TITANIUM COMPONENT - DO NOT USE FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.
      TITANIUM COMPONENT - IF THE MATERIAL SHOWS A CHANGE IN COLOUR TO DARKER THAN A LIGHT STRAW COLOR, THE COMPONENT IS TO BE REJECTED.
      DO NOT REMOVE THE BASE MATERIAL.
    1. Refer to: Figure
      2. Remove highspots, galling and/or burrs from the dovetail root contact surfaces of the blade.
      1. Lightly stone with the use of an annular shaped former of local supply.
        NOTE
        Only highspots, galling and/or burrs are to be removed.
    7. SUBTASK 72-31-11-350-084-B00 Remove the Highspots, Galling and/or Burrs from the LP Compressor Rotor Blade, Assembly B and Assembly C
      CAUTION
      TITANIUM COMPONENT - YOU MUST USE SILICON CARBIDE TYPE ABRASIVE WHEELS, STONES AND PAPERS TO DRESS, BLEND AND POLISH THIS COMPONENT.
      TITANIUM COMPONENT - DO NOT USE FORCE WITH MECHANICAL CUTTERS OR THE MATERIAL WILL BECOME TOO HOT.
      TITANIUM COMPONENT - IF THE MATERIAL SHOWS A CHANGE IN COLOUR TO DARKER THAN A LIGHT STRAW COLOR, THE COMPONENT IS TO BE REJECTED.
      DO NOT REMOVE THE BASE MATERIAL.
    1. Refer to: Figure
      2. Remove highspots, galling and/or burrs from the dovetail root, contact surfaces of the LP Compressor rotor blade(s).
      1. Lightly stone with the use of an annular shaped former of local supply.
        NOTE
        Only highspots, galling and/or burrs are to be removed.
    8. SUBTASK 72-31-11-380-070-A00 Shot Peen the Dovetail Root of the LP Compressor Rotor Blade, Assembly A and Assembly D
    1. Refer to: Figure, Figure, Figure and Figure
      2. Seal the areas of the blade that are not to be shot peened.
      1. Use CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOF or a locally made mechanical seal.
        Patch mask all identification marks, symbols and location pin.
      3. Get the shot-peen parameter, to prove the equipment.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002.
        Use IAE 3R19129 Dummy blade 1 off and/or Authorized Repair Vendor
        Use Co Mat 05-028 cast steel shot to get an Almen intensity of 0.006 to 0.010 in. (0.15 to 0.25 mm) on type "A" test strip.
        A coverage of 200 percent must be applied.
        Use controlled shot peening equipment.
        NOTE
        Unwanted shot-peen spray is permitted in area 'AB'.
    4. Shot peen the dovetail root of the LP Compressor rotor blade(s).
      Shot - Peening Data
      Machine type
      Vacu-blast peening cabinet
      Process type/mode
      Dry / Auto
      Shot type
      Shot hardness
      S230
      Coverage
      200 percent
      Table speed
      N/A
      Oscillation speed
      165 cycles per minute
      Oscillation height
      N/A
      Oscillation type
      N/A
      Air pressure
      21 to 22 p.s.i. (144.9 to 151.8 kPa)
      Nozzle type / diameter
      0.25 in. (6.35 mm)
      Nozzle / work distance
      7.24 to 11.96 in. (184 to 304 mm)
      NOTE
      The above depends on Nozzle Angles and position relative to the blade root.
      Number of nozzle
      8
      Almen intensity
      0.006 to 0.010 in. (0.15 to 0.25 mm) using test strip "A"
      NOTE
      For information, the table speed and oscillation speed specified above may change if different equipment is being used.
    5. Make sure all loose unwanted cast steel shot is removed.
      6. Remove iron contamination as necessary, after you have shot peened.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002 and Authorized Repair Vendor
    7. Remove the mechanical seals and seal tape.
    9. SUBTASK 72-31-11-380-070-B00 Shot-Peen the Dovetail Root of the LP Compressor Rotor Blade(s), Assembly B and Assembly C
    1. Refer to: Figure, Figure and Figure
      2. Seal the areas of the blade that are not to be shot peened.
      1. Use CoMat 02-003 ADHESIVE TAPE BLACK WATERPROOF or a locally made mechanical seal.
        Patch mask all identification marks, symbols and location pin.
      3. Get the shot-peen parameter, to prove the equipment.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002.
        Use IAE 3R19129 Dummy blade 1 off and/or Authorized Repair Vendor
        Use CoMat 05-028 METALLIC SHOT (CAST STEEL), S230 to get an Almen intensity of 0.006 to 0.010 in. (0.15 to 0.25 mm) on type "A" test strip.
        A coverage of 200 percent must be applied.
        Use controlled shot peening equipment.
        NOTE
        Unwanted shot-peen spray is permitted in area 'AB'.
    4. Shot peen the dovetail root of the LP Compressor rotor blade(s).
      Shot - Peening Data
      Machine type
      Vacu-blast peening cabinet
      Process type/mode
      Dry / Auto
      Shot type
      Shot hardness
      S230
      Coverage
      200 percent
      Table speed
      N/A
      Oscillation speed
      165 cycles per minute
      Oscillation height
      N/A
      Oscillation type
      N/A
      Air pressure
      21 to 22 p.s.i. (144.9 to 151.8 kPa)
      Nozzle type / diameter
      0.25 in. (6.35 mm)
      Nozzle / work distance
      7.24 to 11.96 in. (184 to 304 mm)
      NOTE
      The above depends on Nozzle Angles and position relative to the blade root.
      Number of nozzle
      8
      Almen intensity
      0.006 to 0.010 in. (0.15 to 0.25 mm) using test strip "A"
      NOTE
      For information, the table speed and oscillation speed specified above may change if different equipment is being used.
    5. Make sure all loose unwanted cast steel shot is removed.
      6. Remove iron contamination as necessary, after you have shot peened.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002 and Authorized Repair Vendor
    7. Remove the mechanical seals and seal tape.
    10. SUBTASK 72-31-11-220-102-A00 Examine the Shot Peened Dovetail Root of the LP Compressor Rotor Blade, Assembly A and Assembly D
    1. Refer to: Figure, Figure, Figure and Figure
      2. Do a visual examination of the shot peened dovetail root.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002.
    11. SUBTASK 72-31-11-220-102-B00 Examine the Shot Peened Dovetail Root of the LP Compressor Rotor Blade, Assembly B and Assembly C
    1. Refer to: Figure, Figure, Figure and Figure
      2. Do a visual examination of the shot peened dovetail root.
      1. Refer to the SPM TASK 70-38-04-300-503, SUBTASK 70-38-04-300-002.
    12. SUBTASK 72-31-11-340-005 Apply the Metal Spray Coating to the LP Compressor Rotor Blade(s), Assembly C and Assembly D
      1. Apply the metal spray coating to the dovetail root of the blade(s).
      1. Refer to VRS1067 TASK 72-31-11-300-032 (REPAIR-032).
    13. SUBTASK 72-31-11-380-071 Apply Dry Film Lubricant to the LP Compressor Rotor Blade
    1. Apply dry film lubricant to the dovetail root to the blade.
      2. For Assembly A and Assembly D.
      1. Refer, VRS1021 TASK 72-31-11-300-011 (REPAIR-011).
      3. For Assembly B and Assembly C.
      1. Refer, VRS1023 TASK 72-31-11-300-021 (REPAIR-021).
    14. SUBTASK 72-31-11-350-085 Apply the Chocking Pads to the LP Compressor Rotor Blade
    1. Apply the chocking pads to the dovetail root.
      2. For Assembly A and Assembly D.
      1. Refer, VRS1028 TASK 72-31-11-300-013 (REPAIR-013).
      3. For Assembly B and Assembly C.
      1. Refer, VRS1022 TASK 72-31-11-300-009 (REPAIR-009).
    15. SUBTASK 72-31-11-350-086 Identify the Repair
    1. Refer to: Figure
      2. Mark the correct code symbol 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.
        NOTE
        The LP compressor rotor blade can only be shot peened four times to this Repair.
    16. Figure: Repair details and dimensions - Assembly A and Assembly D
    Repair details and dimensions - Assembly A and Assembly D
    Figure: Repair details and dimensions - Assembly B and Assembly C
    Repair details and dimensions - Assembly B and Assembly C
    Figure: Repair details and dimensions - Assemblies A, B, C and D
    Repair details and dimensions - Assemblies A, B, C and D
    Figure: Repair details and dimensions - Assemblies A, B, C and D
    Repair details and dimensions - Assemblies A, B, C and D
    Figure: Repair details and dimensions - Assemblies A, B, C and D
    Repair details and dimensions - Assemblies A, B, C and D
    Figure: Repair details and dimensions - Assemblies A, B, C and D
    Repair details and dimensions - Assemblies A, B, C and D
Requirements After Job Completion
Follow-On Conditions
NONE
Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:IE249
Enterprise Name:DELETED - Was FERGUSSON AND WILD CO LTD,ABRASIVES AND AGGREGATES (no longer in business)
BU Name:DELETED - FERGUSSON AND WILD CO LTD,ABRASIVES AND AGGREGATES (no longer in business)
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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:IE249
Supply Number:CoMat 05-028
Type:sp01
Supply Short Name:CoMat 05-028 METALLIC SHOT (CAST STEEL), S230
Supply Name:CoMat 05-028 METALLIC SHOT (CAST STEEL), S230
Specification Groups:
Doc NumberType
AMS 2431/1 ASR 230
Suppliers:
ManufacturerRemarks
IE249
K0247
55807
Manufacturer Code:LOCAL
Tool Number:Chemical cleaning equipment
Tool Name:Chemical cleaning equipment
Manufacturer Code:LOCAL
Tool Number:Controlled shot peening equipment
Tool Name:Controlled shot peening equipment
Manufacturer Code:0AM53
Tool Number:IAE 3R19129
Tool Name:IAE 3R19129 Dummy blade
Link not Found
Manufacturer Code:LOCAL
Tool Number:Vibro-engraving equipment
Tool Name:Vibro-engraving equipment