TASK 72-50-22-200-007-A00 LPT Stage 3 Vane - Examine

DMC:V2500-A0-72-50-2203-00A-310A-C|Issue No:003.00|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 72-50-22-200-007-A00 LPT Stage 3 Vane - Examine

Effectivity

FIG/ITEM

PART NO.

01-750

3A2412

01-750

3A2926

General

This TASK gives the procedure for the inspection of the stage 3 turbine vane.

Before you do this inspection refer to TASK 72-50-32-200-006-A00 (INSPECTION/CHECK-006).

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 72-50-00-100-000 (CLEANING).

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.

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 70-20-01-200-501

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

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-22-230-113 Examine the Stage 3 Turbine Vane for Cracks

    1. Refer to Figure and Figure.

    2. Clean the parts. Refer to TASK 72-50-00-100-000 (CLEANING).

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

        PART IDENT

        TASK/SUBTASK

        Stage 3 Turbine Vane

        1. Cracked inner or outer platforms in area A9

          1. Not more than 0.010 in. (0.25 mm) maximum depth

          1. Repair-073, VRS4376 TASK 72-50-22-300-073

          2. More than in Step but not more than 0.010 in. (0.25 mm) maximum width and 0.079 in. (2.00 mm) maximum length, not area A12

          1. Repair-106, VRS4514 TASK 72-50-22-300-106

          3. Other than in Step or Step

          1. Reject

        2. Cracked airfoils in areas A1 to A8

          1. Not more than 0.010 in. (0.25 mm) maximum width and 0.079 in. (2.00 mm) maximum length

          1. Repair-106, VRS4514 TASK 72-50-22-300-106

    2. SUBTASK 72-50-22-220-242 Examine the Airfoil, Inner and Outer Annulus/Gaspath Surfaces of the Stage 3 Turbine Vane for Coating Damage

      1. Damaged or not sufficient coating

        1. Damaged or not sufficient coating in areas total less than 1.000 sq in. (645.16 sq mm) per vane airfoil

        1. Repair-054, VRS4269 TASK 72-50-22-300-054

        2. More than in Step

        1. Repair-094, VRS4429 TASK 72-50-22-300-094

      2. Blistering, sulphidation

        1. Do the heat tint test

        2. Not within limits

        1. Repair-094, VRS4429 TASK 72-50-22-300-094 or Repair-073, VRS4376 TASK 72-50-22-300-073

    3. SUBTASK 72-50-22-220-270 Examine the Stage 3 Turbine Vane in Area A1 to A9 for Surface Damage

    1. Refer to Figure.

      2. Examine the surface in area A1.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.020 in. (0.51 mm) maximum depth, not more than 10 percent of area A1

          1. Accept

          2. Nicked, pitted not more than 0.005 in. (0.13 mm) maximum depth, no raised material

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      3. Examine the surface in area A2.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.010 in. (0.25 mm) maximum depth

          1. Accept

          2. Nicked, pitted not more than 0.005 in (0.13 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair-106, VRS4514 TASK 72-50-22-300-106

      4. Examine the surface in area A3.

        1. Nicked, dented, pitted in area A3.1

          1. Not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          2. More than in Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

        2. Nicked, dented, pitted in area A3.2

          1. Not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          2. One round bottom dent per airfoil not more than 0.010 in. (0.25 mm) maximum depth, no coating cracks

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      5. Examine the surface in area A4.

        1. Nicked, dented, pitted in area A4.1

          1. Not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          2. More than in Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

        2. Nicked, dented, pitted in area A4.2

          1. Not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          2. Bent not more than 0.020 in. (0.51 mm) maximum deflection and 0.700 in. (17.78 mm) total maximum length each airfoil

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      6. Examine the surface in area A5.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.010 in. (0.25 mm) maximum depth

          1. Accept

          2. Nicked, pitted not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      7. Examine the surface in area A6.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.020 in. (0.51 mm) maximum depth, not visible from other side, not more than 10 percent of area A6

          1. Accept

          2. Nicked, pitted not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      8. Examine the surface in area A7.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.010 in. (0.25 mm) maximum depth

          1. Accept

          2. Nicked, pitted not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair-106, VRS4514 TASK 72-50-22-300-106

      9. Examine the surface in area A8.

        1. Nicked, dented, pitted

          1. Round bottom dents not more than 0.020 in. (0.51 mm) maximum depth, not visible from other side, not more than 10 percent of area A8

          1. Accept

          2. Nicked, pitted not more than 0.005 in. (0.13 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

      10. Examine the surface in area A9.

        1. Nicked, dented, pitted

          1. Not more than 0.010 in. (0.25 mm) maximum depth, no raised material

          1. Accept

          2. More than in Step

          1. Repair-073, VRS4376 TASK 72-50-22-300-073 or Repair-106, VRS4514 TASK 72-50-22-300-106

    4. SUBTASK 72-50-22-220-245 Examine the Stage 3 Turbine Vane in Area A10 and A11 for Hardface Damage

    1. Refer to Figure.

      2. Damaged or missing hardface coating in area A10

        1. Not more than 10 percent of total area A10

        1. Accept

        2. More than in Step

        1. Repair-103, VRS4475 TASK 72-50-22-300-103

      3. Damaged or missing hardface coating in area A11

        1. Any amount

        1. Accept

    5. SUBTASK 72-50-22-220-243 Examine the Inner and Outer Platform Side Faces of the Stage 3 Turbine Vane

    1. Refer to Figure.

      2. Fretted

        1. Not more than 0.002 in. (0.05 mm) maximum depth

        1. Accept

        2. More than in Step

        1. Reject

      3. Stucked seal strips

      1. Repair-125, VRS4588 TASK 72-50-22-300-125

      4. Seal slot deterioration

      1. Repair-125, VRS4588 TASK 72-50-22-300-125

    6. SUBTASK 72-50-22-220-244 Examine the Stage 3 Turbine Vane at Dimension D1 for Wear

    1. Refer to Figure.

      2. Worn, measure dimension D1

        1. Not more than 0.407 in. (10.35 mm)

        1. Accept

        2. More than in Step

        1. Repair-074, VRS4404 TASK 72-50-22-300-074

    7. SUBTASK 72-50-22-220-246 Examine the Stage 3 Turbine Vane at Dimension D2 for Wear

    1. Refer to Figure.

      2. Worn, measure dimension D2

        1. Not less than 0.305 in. (7.75 mm)

        1. Accept

        2. Less than in Step

        1. Repair-089, VRS4377 TASK 72-50-22-300-089

    8. SUBTASK 72-50-22-220-248 Examine the Stage 3 Turbine Vane at Dimension D3 for Wear

    1. Refer to Figure.

      2. Worn, measure dimension D3

        1. Not less than 0.130 in. (3.30 mm)

        1. Accept

        2. Less than in Step but not less than 0.116 in. (2.95 mm)

        1. Repair-106, VRS4514 TASK 72-50-22-300-106

    9. SUBTASK 72-50-22-220-249 Examine the Stage 3 Turbine Vane at Dimension D4 for Wear

    1. Refer to Figure.

      2. Worn, measure dimension D4

        1. Not less than 0.150 in. (3.81 mm)

        1. Accept

        2. Less than in Step but not less than 0.135 in. (3.43 mm)

        1. Repair-106, VRS4514 TASK 72-50-22-300-106

    10. SUBTASK 72-50-22-220-250 Examine the Stage 3 Turbine Vane at Dimension D5 for Wear

    1. Refer to Figure.

      2. Worn, measure dimension D5

        1. Not less than 0.124 in. (3.15 mm)

        1. Accept

        2. Less than in Step but not less than 0.109 in. (2.78 mm)

        1. Repair-106, VRS4514 TASK 72-50-22-300-106

    11. Figure: Examine the stage 3 turbine vane

    Examine the stage 3 turbine vane

    Figure: Examine the stage 3 turbine vane

    Examine the stage 3 turbine vane

    Figure: Examine the stage 3 turbine vane

    Examine the stage 3 turbine vane

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revision Update (98VM548G)