TASK 72-50-25-200-001-B00 LPT Outer Diffuser Support - Examine, Inspection-001

DMC:V2500-A0-72-50-2502-00B-300A-C|Issue No:002.00|Issue Date:2020-11-01

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 72-50-25-200-001-B00 LPT Outer Diffuser Support - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-010

3A1907

General

This TASK gives the procedure for the inspection of the outer diffuser assembly support. For the other LP turbine diffuser duct parts refer to TASK 72-50-25-200-000 (INSPECTION/CHECK-000).

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

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

All parts must be cleaned before any part is examined. Refer to TASK 72-50-25-100-000 (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 have a crack test is given in SUBTASK 72-50-25-230-061. Do the 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 the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair 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.

Reference

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 70-20-01-200-501

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

NameManufacturerPart Number / IdentificationQuantityRemark
Dial gageLOCALDial gage
Dial indicatorLOCALDial indicator
Dial caliperLOCALDial caliper
Illuminated magnifier (portable)LOCALIlluminated magnifier (portable)

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-25-230-061-001 Examine the Outer Diffuser Support Assembly for Cracks

    1. Refer to Figure.

    2. Clean the parts. Refer to TASK 72-50-25-100-000 (CLEANING-000).

      3. Do the test for cracks on the part that are given below. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Outer diffuser support assembly

        1. Cracked in area A4

        1. Accept

        2. Cracked in the weld seam

        1. Repair-030, VRS4599 TASK 72-50-25-300-030

        3. Cracked in any other area

        1. Reject

    2. SUBTASK 72-50-25-220-085 Examine the Surface of the Outer Diffuser Assembly Support for Damage

      1. Examine the surface for nicks and dents. Use Dial gage and Dial indicator.

        1. Any number, up to 0.004 in. (0.1 mm) in depth with no raised metal

        1. Accept

        2. Other than in Step

        1. Repair-017, VRS4316 TASK 72-50-25-300-017

    3. SUBTASK 72-50-25-220-086 Examine the Front Location Lip of the Outer Diffuser Assembly Support for Wear

    1. Refer to Figure.

      2. Examine the front location lip. Use Dial gage and Dial indicator.

        1. Worn

          1. If dimension D1 is between 0.0945 in. and 0.0875 in. (2.40 mm and 2.22 mm)

          1. Accept

          2. Less than in Step

          1. Repair-016, VRS4312 TASK 72-50-25-300-016 **

    4. SUBTASK 72-50-25-220-087 Examine the Sealing Plate of the Outer Diffuser Assembly Support for Damage

    1. Refer to Figure.

      2. Examine the sealing plate for damage.

        1. Bent

          1. Lightly bent, does not affect assembly

          1. Accept

          2. Badly bent, assembly is affected

          1. Repair-019, VRS4313 TASK 72-50-25-300-019

    5. SUBTASK 72-50-25-220-088 Examine the Clinch Nuts of the Outer Diffuser Assembly Support

      1. Examine the clinch nuts.

        1. Axial movement of more than 0.010 in. (0.25 mm)

        1. Repair-020, VRS4314 TASK 72-50-25-300-020

        2. Damaged

        1. Repair-020, VRS4314 TASK 72-50-25-300-020

    6. SUBTASK 72-50-25-220-089 Examine the Location Key of the Outer Diffuser Assembly Support

      1. Examine the location key.

        1. Loose key

        1. Repair-021, VRS4315 TASK 72-50-25-300-021

        2. Use Dial caliper to examine the location key for wear.

          3. Key dimension is between 0.3201 in. and 0.3141 in. (8.13 mm and 7.98 mm).

          1. Accept

          4. Less than in Step

          1. Repair-021, VRS4315 TASK 72-50-25-300-021

    7. SUBTASK 72-50-25-220-090 Examine the End Faces of the Outer Diffuser Assembly Support at Location A1

    1. Refer to Figure.

      2. Examine the end faces. Use Dial gage and Dial indicator.

        1. Fretted

          1. Up to 0.003 in. (0.076 mm) in depth

          1. Accept

          2. More than in Step

          1. Reject

    8. SUBTASK 72-50-25-220-091 Examine the Rear Location Hook of the Outer Diffuser Assembly Support

    1. Refer to Figure.

      2. Examine the rear location hook.

        1. Use Dial caliper to examine the rear location hook for wear.

          1. Hook dimension D2 is between 0.0787 in. and 0.0738 in. (1.99 mm and 1.87 mm)

          1. Accept

          2. Less than in Step

          1. Repair-028, VRS4311 TASK 72-50-25-300-028

    9. SUBTASK 72-50-25-220-092 Examine the Locating Face of the Outer Diffuser Assembly Support at Location A2

    1. Refer to Figure.

      2. Examine the locating face. Use Dial gage and Dial indicator.

        1. Fretted

          1. Not more than 0.004 in. (0.1 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair-029, VRS4477 TASK 72-50-25-300-029

        2. Corroded, oxidized or sulphidized

          1. Not more than 0.020 in. (0.51 mm) in depth

          1. Repair-029, VRS4477 TASK 72-50-25-300-029

          2. More than in Step

          1. Reject

    10. SUBTASK 72-50-25-220-093 Examine the Locating Slots of the Outer Diffuser Assembly Support at Location A3

    1. Refer to Figure.

      2. Examine the locating slots. Use Dial gage and Dial indicator.

        1. Fretted

          1. Up to 0.002 in. (0.05 mm) in depth

          1. Accept

          2. More than in Step

          1. Reject

    11. Figure: Examine the Outer Diffuser Support Assembly

    Examine the Outer Diffuser Support Assembly

    Figure: Examine the Outer Diffuser Support Assembly

    Examine the Outer Diffuser Support Assembly

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised incorrect link. Added link. (Editorial)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Dial caliper
Tool Name:Dial caliper
Link not Found
Manufacturer Code:LOCAL
Tool Number:Dial indicator
Tool Name:Dial indicator
Manufacturer Code:LOCAL
Tool Number:Illuminated magnifier (portable)
Tool Name:Illuminated magnifier (portable)