TASK 72-50-24-300-027 LPT Stage 3 Inner Air Seal Ring - Blend Repair, Repair-027 (VRS4133)

DMC:V2500-A0-72-50-2404-00A-649A-C|Issue No:003.00|Issue Date:2017-05-01

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 72-50-24-300-027 LPT Stage 3 Inner Air Seal Ring - Blend Repair, Repair-027 (VRS4133)

Effectivity

FIG/ITEM

PART NO.

01-250

3A0961

01-250

3A1566

01-250

3A3108

01-250

3A3109

Material of component

PART IDENT

IAE SYMBOL

MATERIAL

Stage 3 air seal ring

-

C 263

General

Price and availability - none

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

Make sure that the necessary cleaning and inspection procedures are done before this repair.

NOTE

For more equipment and materials necessary to do this repair refer to the SPM TASK 70-23-05-230-501 and TASK 70-35-03-300-501.

NOTE

Equivalent equipment may be used.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

  1. SUBTASK 72-50-24-350-057 General Instructions for the Blend Repair of the Stage 3 Air Seal Ring

    This subtask has been deleted.

    2. SUBTASK 72-50-24-350-058 Blend Repair the Stage 3 Air Seal Ring

    1. Refer to Figure.

      NOTE

      1. Refer to SPM TASK 70-35-03-300-501 for blending surface damage.

      2. For local blending use a length to depth ratio of 5:1 minimum, refer to Figure.

      3. Unless stated differently, there is no limit for the number of blends. If there is a number of damage marks close together, blend the whole area to the specified depth. Minimum distance between blends is 0.500 in. (12,7 mm).

      2. Blend repair in area A1.

      1. Maximum permitted depth of blend repair is 0.008 in. (0.20 mm).

      3. Blend repair in area A2.

      1. No blend repair is necessary.

        Dress to remove the raised material only.

      4. Blend repair the holes and the honeycombs.

      1. No blend repair is necessary.

        Dress to remove the raised material only.

  3. SUBTASK 72-50-24-110-061 Clean the Stage 3 Air Seal Ring

    This subtask has been deleted.

    4. SUBTASK 72-50-24-230-059 Examine the Blended Areas for Cracks

      1. Do the test for cracks.

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

        Use medium sensitivity level.

        No cracks are permitted.

  5. SUBTASK 72-50-24-110-062 Clean the Stage 3 Air Seal Ring

    This subtask has been deleted.

    6. SUBTASK 72-50-24-220-088 Do the Post Repair Inspection

    1. Refer to Figure.

      2. Examine the surface of the blended areas visually.

      1. The blended surface must be as smooth as the initial surface.

        Edges and corners are not permitted.

      3. Examine the blended areas dimensionally.

      1. The blend ratio must be in the limits.

    7. Figure: Blend Repair the Stage 3 Air Seal Ring

    Blend Repair the Stage 3 Air Seal Ring

Requirements After Job Completion

Follow-On Conditions

NONE