TASK 72-32-81-300-001 LPC Stage 1.5 - 2.5 Drum Disk - Blend Repair The Knife Edges, Repair-001 (VRS1364)

DMC:V2500-A0-72-32-8100-00A-649A-C|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 72-32-81-300-001 LPC Stage 1.5 - 2.5 Drum Disk - Blend Repair The Knife Edges, Repair-001 (VRS1364)

Effectivity

FIG/ITEM

PART NO.

01-200

5R7021

General

This Repair TASK gives the procedure for blending the knife edge seals of the disks.

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Disk

Titanium alloy

Price and availability

Refer to IAE for any of these items.

Tools

Repair parts

Repair of spares

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Portablegrinding equipmentLOCALPortable grinding equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-81-350-051 Dress to remove the Damage

      1. CAUTION

        TITANIUM COMPONENTS.
        SILICON CARBIDE TYPE WHEELS, STONES AND ABRASIVE PAPERS ARE TO BE USED FOR THIS REPAIR.
        ALUMINUM OXIDE TYPES MUST NOT BE USED.
        THE MATERIAL WILL OXIDIZE AND CRACK IF MECHANICAL CUTTERS ARE USED HEAVILY. THIS HAS OCCURRED IF THE COMPONENT SHOWS DARK STRAW TO BLUE DISCOLORATION. IF AT ANY TIME THIS COLORATION OCCURS THE DISK MUST BE REJECTED.

        Dress to remove the damage.

      1. Use portable grinding equipment.

      2. Dress until all the damage is removed.

      2. Blend the dressed area and polish out scores.

      1. Refer to Figure.

      2. Dressing limits (Figure).

      3. The disk has three knife edge seals, and each seal has two fins.

      4. One fin can be dressed for each seal.

      5. Dressed area for one fin must be less than 0.055 sqin (35.48 sqmm).

    2. SUBTASK 72-32-81-220-051 Examine the Disks

      1. Do a visual inspection.

      1. Refer to TASK 72-32-81-200-000 (INSPECTION-000).

    3. SUBTASK 72-32-81-230-051 Do a Crack Test

      1. Do the penetrant crack test for the repaired area.

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

        1. Make sure there is no crack in repaired area.

    4. SUBTASK 72-32-81-350-052 Make a Mark for the Repair Number

    1. Refer to Figure.

      2. Vibro-engrave VRS1364 on the top surface of the dovetail.

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

    5. Figure: Dressing Limits

    Dressing Limits

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Portable grinding equipment
Tool Name:Portablegrinding equipment