TASK 72-50-00-300-006 LPT Stage 6 Inner Air Seal - Rebalance, Repair-006 (VRS4027)

DMC:V2500-A0-72-50-0021-00A-709A-C|Issue No:002.00|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 72-50-00-300-006 LPT Stage 6 Inner Air Seal - Rebalance, Repair-006 (VRS4027)

Effectivity

FIG/ITEM

PART NO.

01-240

3A0078

01-240

3A3063

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Stage 6 turbine inner air seal

-

Inconel 718

General

Price and availability - none

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.

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Crack detection kit (fluorescent)LOCALCrack detection kit (fluorescent)
Depth gageLOCALDepth gage
Dial caliperLOCALDial caliper
Hand held pneumatic grinderLOCALHand held pneumatic grinder
Illuminated magnifier (portable)LOCALIlluminated magnifier (portable)
One plane vertical balancing machineLOCALOne plane vertical balancing machine
Radius gaugeLOCALRadius gauge
Rotary filesLOCALRotary files
Roughness microtesterLOCALRoughness microtester
Vernier caliperLOCALVernier caliper
Unltraviolet lampLOCALUltraviolet lamp
IAE 1M14236 Balancing fixture0AM53IAE 1M142361

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 05-113 EMERY POLISHING PAPERLOCALCoMat 05-113

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-00-350-056 General Instructions for the Rebalancing of the Stage 6 Inner Air Seal (01-240) after Repair

      NOTE

      1. Keep material removal to the minimum to get balance within limits.

      2. Do not remove material from a small area. Apply material removal over a larger amount, with less removal to permit further rebalancing.

      3. Crack test after machining is optional. If used do the crack test before butterfly polishing to get optimal results. Refer to the SPM TASK 70-35-19-350-501.

      1. Remove material to get balance within limits.

      1. Machine grind the inner air seal.

        Use controlled machining technique (CMT) in a circumferential direction.

        For small material removal use files.

        Edges must be rounded 0.008 to 0.020in. (0.20 to 0.50 mm).

        Use butterfly polishing.

        Refer to the SPM TASK 70-35-19-350-501.

      2. Polish the worked areas.

      1. Use fine stones and CoMat 05-113 EMERY POLISHING PAPER to make the worked surface as smooth as the original surface if necessary.

        Edges are not permitted.

    2. SUBTASK 72-50-00-350-057 Rebalancing the Stage 6 Turbine Inner Air Seal (01-240)

    1. Refer to: Figure

      2. Install the air seal in to one plane vertical balancing machine.

      1. Align top marks.

      3. Do the check for static unbalance of the air seal at 900 RPM minimum.

      1. Use balancing by indexing method.

        Initial unbalance must not be more than maximum 1.00oz in. (720 gmm) when attached on diameter B and on plane A.

        Remaining unbalance must not be more than maximum 0.10oz in. (72 gmm).

      4. Correct the unbalance.

      1. Remove material to bring the unbalance within limits, refer to Step.

        Remove material as shown in Figure and in Figure.

    3. SUBTASK 72-50-00-230-055 Do the Post Repair Inspection for Crack Test Areas

      NOTE

      This is an optional procedure.

    1. Refer to: Figure

      2. Do the test for cracks after material removal with machine and files.

      1. Do the crack test after material removal but before butterfly polishing to get optimal results, refer to TASK 70-23-05-230-501.

        Use crack detection kit (fluorescent) and ultraviolet lamp.

    4. SUBTASK 72-50-00-220-065 Do the Post Repair Inspection

      1. Examine the surface finish.

      1. The surface finish of all repairs must be as good as the adjacent areas.

        Use illuminated magnifier.

      2. Examine the reworked areas dimensionally.

      1. Make sure that dimensions are not more than maximum, refer to Figure.

        Use vernier caliperdial caliperradius gage set, radius gage set and roughness microtester.

    5. Figure: Rebalance the stage 6 turbine inner air seal

    Rebalance the stage 6 turbine inner air seal

    Figure: Balancing diagram of stage 6 turbine inner air seal

    Balancing diagram of stage 6 turbine inner air seal

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion

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:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:KC1D9
Supply Number:CoMat 05-113
Type:sp01
Supply Short Name:CoMat 05-113 EMERY POLISHING PAPER
Supply Name:CoMat 05-113 EMERY POLISHING PAPER
Specification Groups:
Doc NumberType
FEPA GRIT SIZE P600 EMERY POLISHING PAPER OR ALUMINUM OXIDE ABRASIVE PAPER
Suppliers:
ManufacturerRemarks
KC1D9
LOCAL
Manufacturer Code:LOCAL
Tool Number:Crack detection kit (fluorescent)
Tool Name:Crack detection kit (fluorescent)
Manufacturer Code:LOCAL
Tool Number:Depth gage
Tool Name:Depth gage
Manufacturer Code:LOCAL
Tool Number:Dial caliper
Tool Name:Dial caliper
Manufacturer Code:LOCAL
Tool Number:Hand held pneumatic grinder
Tool Name:Hand held pneumatic grinder
Manufacturer Code:0AM53
Tool Number:IAE 1M14236
Tool Name:IAE 1M14236 Balancing fixture
Manufacturer Code:LOCAL
Tool Number:Illuminated magnifier (portable)
Tool Name:Illuminated magnifier (portable)
Manufacturer Code:LOCAL
Tool Number:One plane vertical balancing machine
Tool Name:One plane vertical balancing machine
Manufacturer Code:LOCAL
Tool Number:Radius gauge
Tool Name:Radius gauge
Manufacturer Code:LOCAL
Tool Number:Rotary files
Tool Name:Rotary files
Manufacturer Code:LOCAL
Tool Number:Roughness microtester
Tool Name:Roughness microtester
Manufacturer Code:LOCAL
Tool Number:Ultraviolet lamp
Tool Name:Unltraviolet lamp
Manufacturer Code:LOCAL
Tool Number:Vernier caliper
Tool Name:Vernier caliper