TASK 72-50-24-200-004-B00 LPT Stage 3 Inner Air Seal Ring - Examine The Stage 3 Air Seal Ring

DMC:V2500-A0-72-50-2404-00B-300A-C|Issue No:002.00|Issue Date:2015-02-01

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 72-50-24-200-004-B00 LPT Stage 3 Inner Air Seal Ring - Examine The Stage 3 Air Seal Ring

Effectivity

FIG/ITEM PART NO.

01-250

3A3108

01-250

3A3109

General

This TASK gives the procedure for the inspection of the air seal ring. For the other LP turbine inner static seal parts, refer to TASK 72-50-24-200-000 (INSPECTION/CHECK-000).

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-00-200-501.

All parts must be cleaned before any part is examined. Refer to TASK 72-50-24-100-000 (CLEANING-000).

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in Step. Do the crack test before the part is visually examined.

A ** following any repair referenced in this inspection indicates that the repair is not yet published in the current revision of this manual and the part must be rejected. Contact IAE for additional information concerning FAA approved data.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in Repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

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

References

Refer to the SPM for data on these items.

Definitions of Damage, SPM TASK 70-02-02-350-501

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501

Inspection of Parts, SPM TASK 70-20-00-200-501

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Method of testing for crack indications

Chemical processes

Surface protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-24-230-001 Examine the Stage 3 Air Seal Ring for Cracks

    1. Clean the parts. Refer to CLEANING-000 TASK 72-50-24-100-000 .

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant procedure.

        PART IDENT TASK/SUBTASK

        Stage 3 Air Seal Ring

        1. Cracked

        1. Reject

    2. SUBTASK 72-50-24-220-001 Examine the Stage 3 Air Seal Ring for Surface Damage

      1. Nicked, dented, pitted.

        1. Not more than 0.004 in. (0.10 mm) maximum depth, no raised material

        1. Accept

        2. Other than in Step

        1. Repair, REPAIR-027 (VRS4133) TASK 72-50-24-300-027.

    3. SUBTASK 72-50-24-220-002 Examine the Honeycomb Seals of the Stage 3 Air Seal Ring for Damage

      1. Unbonded.

        1. Unbonded areas, maximum 20 adjacent cells, minimum distance 60 degrees apart

        1. Accept

        2. Other than in Step

        1. Repair, REPAIR-061 (VRS4564) TASK 72-50-24-300-061 .

      2. Damaged or bent cells.

        1. Not more than 3 rows damaged, maximum length 0.800 in. (20.3 mm)

        1. Accept

        2. Other than in Step

        1. Repair, REPAIR-061 (VRS4564) TASK 72-50-24-300-061

      3. Rub damaged.

        1. Maximum 0.015 in. (0.38 mm) depth, 0.160 in. (4.06 mm) width

        1. Accept

      2. Other than in Step

        Repair, REPAIR-061 (VRS4564) TASK 72-50-24-300-061

    4. SUBTASK 72-50-24-220-003 Examine the Stage 3 Air Seal Ring in Area A1 for Wear

    1. Refer to Figure.

      2. Fretted.

        1. Not more than 0.005 in. (0.13 mm) maximum depth, no raised material

        1. Accept

        2. More than in Step

        1. Repair, REPAIR-029 (VRS4135) TASK 72-50-24-300-029

    5. SUBTASK 72-50-24-220-004 Examine the Stage 3 Air Seal Ring at Area A2 for Wear

    1. Refer to Figure.

      2. Fretted.

        1. Up to 0.002 in. (0.05 mm) maximum depth, no raised material

        1. Accept

        2. Other than in Step

        1. Repair, REPAIR-027 (VRS4133) TASK 72-50-24-300-027.

    6. SUBTASK 72-50-24-220-005 Examine the Stage 3 Air Seal Ring at Area A3 for Wear

    1. Refer to Figure.

      2. Worn, measure the dimension D4.

        1. Not less than 0.0827 in. (2.10 mm) minimum, no raised material

        1. Accept

        2. Not less than 0.0827 in. (2.10 mm) minimum, with raised material

        1. Repair, REPAIR-027 (VRS4133) TASK 72-50-24-300-027.

      3. Less than in Step

      1. Reject

    7. SUBTASK 72-50-24-220-006 Examine the Stage 3 Air Seal Ring at Diameter D1 for Wear and Shrinkage

    1. Refer to Figure.

      2. Worn, measure the Diameter D1.

        1. Not less than 19.3995 in. (492.75 mm) minimum diameter

        1. Accept

        2. Less than in Step

        1. Repair, REPAIR-030 (VRS4136) TASK 72-50-24-300-030.

        2. Shrunken or grown diameter must not be plasma spray repaired

      3. Shrunken, measure Diameter D1

        1. Not less than 19.3937 in. (492.60 mm) minimum diameter

        1. Accept

        2. Less than in Step

        1. Reject

    8. SUBTASK 72-50-24-220-007 Examine the Stage 3 Air Seal Ring at Diameter D2 for Wear and Shrinkage

    1. Refer to Figure.

      2. Worn, measure the Diameter D2.

        1. Not less than 19.3602 in. (491.75 mm) minimum diameter

        1. Accept

        2. Less than in Step

        1. Repair, REPAIR-030 (VRS4136) TASK 72-50-24-300-030.

        2. Shrunken or grown diameter must not be plasma spray repaired

      3. Shrunken, measure Diameter D2

        1. Not less than 19.3535 in. (491.58 mm) minimum diameter

        1. Accept

        2. Less than in Step

        1. Reject

    9. SUBTASK 72-50-24-220-008 Examine the Fin of the Stage 3 Air Seal Ring at Diameter D3 for Wear

    1. Refer to Figure.

      2. Worn, measure the Diameter D3.

        1. Not less than 21.4950 in. (545.97 mm) minimum diameter

        1. Accept

        2. Less than in Step

        1. Repair, REPAIR-005 (VRS4053) TASK 72-50-24-300-005.

    10. Figure: Examine the Stage 3 Air Seal Ring

    Examine the Stage 3 Air Seal Ring

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised task to add PN 3A3109. Added task reference for VRS4564. (EA12VM540)