TASK 72-50-25-200-002-B00 LPT Outer Diffuser Segment - Examine, Inspection-002

DMC:V2500-A0-72-50-2501-00B-300A-C|Issue No:001.00|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 72-50-25-200-002-B00 LPT Outer Diffuser Segment - Examine, Inspection-002

Effectivity

FIG/ITEM PART NO.

01-200

3A1791

General

This TASK gives the procedure for the inspection of the outer diffuser segment. For the other LP diffuser 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 70-20-00-200-501.

All the 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 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 currend 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 72-50-25-230-062 Examine the Outer Diffuser Segment for Cracks

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

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

        PART IDENT TASK/SUBTASK

        Outer Diffuser Segment

        1. Cracked originating from seal groove end.

          1. Not more than 0.1378 in. (3.500 mm) maximum length

          1. Accept

          2. More than in (a)

          1. Reject

        2. Cracked in any other area

        1. Reject

    2. SUBTASK 72-50-25-220-094 Examine the Outer Diffuser Segment for Surface Damage

      1. Examine the surface for damage.

        1. Nicked or dented.

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

          1. Accept

          2. More than in (a)

          1. Repair, VRS4280 TASK 72-50-25-300-023 (REPAIR-023)

    3. SUBTASK 72-50-25-220-095 Examine the Outer Diffuser Segment at Rear Location Hook

    1. Refer to Figure.

      2. Examine the rear location hook at dimension D1 for wear, corrosion or sulphidation.

        1. Worn, corroded or sulphidated.

          1. Not more than 0.1516 in. (3.851 mm)

          1. Accept

          2. Not more than 0.1654 in. (4.201 mm) and maximal cumulative length of 2.200 in. (55.88 mm)

          1. Accept

          3. More than in (a) and (b)

          1. Reject

      3. Examine the rear face in area A1 for wear, corrosion or sulphidation.

        1. Fretted, corroded or sulphidated.

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

          1. Accept

          2. More than in (a)

          1. Reject

    4. SUBTASK 72-50-25-220-096 Examine the Outer Diffuser Segment in Area A2

    1. Refer to Figure.

      2. Examine the segment in area A2 for wear, corrosion or sulphidation.

        1. Fretted.

          1. Not more than 0.004 in. (0.10 mm) maximum depth

          1. Accept

          2. More than in (a)

          1. Repair, VRS4148 TASK 72-50-25-300-011 (REPAIR-011)**

        2. Corroded or sulphidated.

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

          1. Repair, VRS4148 TASK 72-50-25-300-011 (REPAIR-011)**

          2. More than in (a)

          1. Reject

    5. SUBTASK 72-50-25-220-097 Examine the Locating Pins of the Outer Diffuser Segment

      1. Examine the locating pins for wear.

        1. Fretted.

          1. Not more than 0.003 in. (0.08 mm) maximum depth on the diameter

          1. Accept

          2. More than in (a)

          1. Repair, VRS4308 TASK 72-50-25-300-018 (REPAIR-018)

    6. SUBTASK 72-50-25-220-098 Examine the Bolt Hole of the Outer Diffuser Segment

    1. Refer to Figure.

      2. Examine the inner diameter D2 of the bolt hole for wear.

        1. Worn.

          1. Not more than 0.2669 in. (6.779 mm) in diameter

          1. Accept

          2. More than in (a)

          1. Reject

    7. SUBTASK 72-50-25-220-112 Examine the Side Faces of the Outer Diffuser Segment

    1. Refer to Figure.

      2. Examine area A3 for surface damage.

        1. Nicked, dented, pitted.

          1. Any number not more than 0.012 in. (0.30 mm) maximum depth, no raised material

          1. Accept

          2. Any number not more than 0.012 in. (0.30 mm) maximum depth, with raised material

          1. Repair, VRS4280 TASK 72-50-25-300-023 (REPAIR-023)

          3. More than in (a)

          1. Reject

      3. Examine the surface in area A4 for wear, corrosion or sulphidation.

        1. Worn, corroded or sulphidated.

          1. Originating from the seal groove and not extending to any edge of the side face not more than 0.060 in. (1.52 mm) maximum depth

          1. Accept

          2. Other than in (a)

          1. Reject

      4. Examine the surface in area A5 for wear, corrosion or sulphidation.

        1. Worn, corroded or sulphidated.

          1. Not more than a maximum depth of 50 percent of the wall thickness, but a maximum of 0.030 in. (0.76 mm) and not more than a maximum cumulative length on both sides of the seal groove of 1.300 in (33.02 mm)

          1. Accept

          2. More than in (a)

          1. Reject

      5. Examine the surface in area A6 for wear, corrosion or sulphidation.

        1. Worn, corroded or sulphidated.

          1. Not more than 0.003 in. (0.08 mm) maximum depth

          1. Accept

          2. More than in (a)

          1. Reject

    8. Figure: Examine the Outer Diffuser Segment

    Examine the Outer Diffuser Segment

    Figure: Examine the Outer Diffuser Segment

    Examine the Outer Diffuser Segment

Requirements After Job Completion

Follow-On Conditions

NONE