TASK 72-50-33-200-001-B00 LPT Stage 7 Rotating Airseal - Examine, Inspection-001

DMC:V2500-A0-72-50-3307-00B-300A-C|Issue No:003.00|Issue Date:2018-05-01

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 72-50-33-200-001-B00 LPT Stage 7 Rotating Airseal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-010

3A1741

01-010

3A2522

General

This TASK gives the procedure for the inspection of the stage 7 turbine air seal. For the other LP Turbine rotating seal parts, refer to TASK 72-50-33-200-000 (INSPECTION-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 the parts must be cleaned before any part is examined. Refer to the TASK 72-50-33-100-000 (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 test before the part is visually examined.

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.

Removal of hardface coating on the knife-edge seals is not necessary: but the hardface removal will supply a more complete and accurate inspection of the knife-edge seals. Refer to VRS4087, TASK 72-50-33-300-040 (REPAIR-040).

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.

Definition 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

NameManufacturerPart Number / IdentificationQuantityRemark
Horizontal rotating tableLOCALHorizontal rotating table

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-33-230-106 Examine the Stage 7 Turbine Air Seal for Cracks

    1. Refer to: Figure

    2. Clean the parts. Refer to TASK 72-50-33-100-000 (CLEANING-000).

      3. Do the test for cracks on the parts without location A1, that are given below. Use applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 7 turbine air seal

        1. Cracked

        1. Reject

      4. Do the test for cracks on the parts at location A1, that are given below. Use applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 7 turbine air seal

        1. Cracked.

          1. Maximum depth up to 0.040 in. (1.0 mm)

          1. Repair, VRS4449 TASK 72-50-33-300-056 (REPAIR-056)

          2. More than in (a)

          1. Repair, VRS4004 TASK 72-50-33-300-036 (REPAIR-036)

    2. SUBTASK 72-50-33-220-125 Examine the Stage 7 Turbine Air Seal for Damage

    1. Refer to: Figure

      2. Examine the stage 7 turbine air seal surface at location A3 for nicks. Use horizontal rotating table.

        1. Nicked, depth up to 0.0004 in. (0.01 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      3. Examine the stage 7 turbine air seal surface at location A3 for dents.

        1. Dented, depth up to 0.0004 in. (0.01 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      4. Examine the stage 7 turbine air seal surface at location A3 for scratches.

        1. Scratched, depth up to 0.0004 in. (0.01 mm), if in circumferential direction and 0.0002 in. (0.005 mm) if in other direction

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

    3. SUBTASK 72-50-33-220-126 Examine the Stage 7 Turbine Air Seal for Surface Damage

    1. Refer to: Figure

      2. Examine the stage 7 turbine air seal surface at location A2 for nicks. Use horizontal rotating table.

        1. Nicked, depth up to 0.001 in. (0.025 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      3. Examine the stage 7 turbine air seal surface at location A2 for dents.

        1. Dented, depth up to 0.002 in. (0.050 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      4. Examine the stage 7 turbine air seal surface at location A2 for scratches.

        1. Scratched, depth up to 0.002 in. (0.050 mm), if in circumferential direction and 0.001 in. (0.025 mm), if in other direction

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      5. Examine the seal surface at location A2 for foreign material, deposits, corrosion. scale on all locations.

        1. Pits or material depletion after cleaning/removal of foreign material deposits, corrosion or scale up to a maximum depth of 0.002 in. (0.05 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

      6. Examine the seal surface for foreign material, deposits, corrosion. scale on all locations A7.

        1. Pits or material depletion after cleaning/removal of foreign material deposits, corrosion or scale up to a maximum depth of 0.004 in. (0.10 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

    4. SUBTASK 72-50-33-220-127 Examine the Stage 7 Turbine Air Seal for Damage

    1. Refer to: Figure

      2. Examine the stage 7 turbine air seal surface at location A1 for nicks.

        1. Nicked, depth up to 0.004 in. (0.10 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4449 TASK 72-50-33-300-056 (REPAIR-056)

      3. Examine the stage 7 turbine air seal surface at location A1 for dents.

        1. Dented, depth up to 0.004 in. (0.10 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4449 TASK 72-50-33-300-056 (REPAIR-056)

      4. Examine the stage 7 turbine air seal surface at location A1 for bent.

        1. Bent, up to 0.001 in. (0.25 mm) deflection and 0.040 in. (1.0 mm) depth, if contour is rounded

        1. Accept

        2. More than in (1)

        1. Repair, VRS4004 TASK 72-50-33-300-036 (REPAIR-036)

      5. Examine the stage 7 turbine air seal surface at location A1 for chipped coating.

        1. Chipped coating, any number of areas, if total not more than 25 per cent of circumference

        1. Accept

        2. More than in (1)

        1. Repair, VRS4087 TASK 72-50-33-300-040 (REPAIR-040)

    5. SUBTASK 72-50-33-220-128 Examine the Stage 7 Turbine Air Seal for Damage

    1. Refer to: Figure

      2. Examine the stage 7 turbine air seal at location A4 (at the tiebolt holes) for nicks, dents and scratches. (including lead - in radii).

        1. Depth up to 0.001 in. (0.025 mm) and roundbottom dents in lead - in radii up to 0.005 in. (0.127 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4060 TASK 72-50-33-300-039 (REPAIR-039)

    6. SUBTASK 72-50-33-220-129 Examine the Stage 7 Turbine Air Seal for Fretting

    1. Refer to: Figure

      2. Examine the stage 7 turbine air seal at location A5.

        1. Fretted, depth up to 0.004 in (0.1 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4089 TASK 72-50-33-300-041 (REPAIR-041)

      3. Examine the stage 7 turbine air seal at location A6.

        1. Fretted, depth up to 0.002 in. (0.05 mm)

        1. Accept

        2. More than (1)

        1. Reject

    7. SUBTASK 72-50-33-220-130 Examine the Stage 7 Turbine Air Seal for Wear

    1. Refer to: Figure

      2. Measure the diameter D1 for wear at the two seal fins at 120, 240 and 360 degrees. Get an average dimension.

        1. 20.9626 in. (532.45 mm) minimum for each diameter

        1. Accept

        2. Less than in (1)

        1. Repair, VRS4004 TASK 72-50-33-300-036 (REPAIR-036) or Repair, VRS4087 TASK 72-50-33-300-040 (REPAIR-040)

    8. SUBTASK 72-50-33-220-131 Examine the Stage 7 Turbine Air Seal Snap Diameter for Wear

    1. Refer to: Figure

      2. Measure the diameter D2 for wear at 120, 240 and 360 degrees. Get an average dimension.

        1. Up to 19.1236 in. (485.74 mm) maximum diameter

        1. Accept

        2. More than in (1)

        1. Repair, VRS4005 TASK 72-50-33-300-037 (REPAIR-037). Shrunken or grown diameter must not be plasma spray repaired

      3. Measure the diameter D2 for shrinkage and growth at 120, 240 and 360 degrees. Get an average dimension.

        1. Between 19.1161 and 19.1220 in. (485.55 and 485.70 mm)

        1. Accept

        2. Between 19.1142 and 19.1240 in. (485.50 and 485.75 mm)

        1. Accept the part for select fit only

          NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of reference 3364 or 3664 or 3764. Refer to TASK 72-50-30-440-005.

        3. Other than in (1) or (2)

        1. Reject

    9. Figure: Examine the Stage 7 Air Seal

    Examine the Stage 7 Air Seal

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Corrected Typing Error

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Horizontal rotating table
Tool Name:Horizontal rotating table