TASK 72-50-22-200-004-A00 LPT Stage 4 Vane - Examine, Inspection-004

DMC:V2500-A0-72-50-2204-00A-300A-C|Issue No:003.00|Issue Date:2015-11-01

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 72-50-22-200-004-A00 LPT Stage 4 Vane - Examine, Inspection-004

Effectivity

FIG/ITEM

PART NO.

01-550

3A0637

General

This TASK gives the procedure for the inspection of the stage 4 turbine vanes.

Before you do this inspection refer to TASK 72-50-32-200-007 (INSPECTION-007, CONFIG-001)

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 72-50-22-100-000 (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 SUBTASK 72-50-22-230-054. 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 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.

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

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Dial indicator with ball insertLOCALDial indicator with ball insert
Dial gageLOCALDial gage
Dial indicator with needle insertLOCALDial indicator with needle insert
Small hole gageLOCALSmall hole gage
External micrometerLOCALExternal micrometer
Dial caliperLOCALDial caliper

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-22-230-054-001 Examine the Stage 4 Turbine Vanes for Cracks

      1. Do the test for cracks.

        1. Fluorescent penetrant inspection for cracks

      2. Cracked vane outer cluster bonds.

        1. Any number, total one of a complete braze joint for each cluster provided inner cluster bonds are free of cracks

        1. Accept

        2. More than in Step

        1. Reject

      3. Cracked vane inner cluster bonds.

        1. Any number, total a half of a complete braze joint for each cluster provided outer cluster bonds are free of cracks

        1. Accept

        2. More than in Step

        1. Reject

      4. Cracked inner or outer platform at location A9.

        1. Cracks up to 0.010 in. (0.254 mm) maximum depth

        1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

        2. More than in Step

        1. Reject

      5. Cracked airfoils

      1. Reject

    2. SUBTASK 72-50-22-230-054-002 Examine the Stage 4 Turbine Vanes for Cracks

      1. Do the test for cracks.

        1. Fluorescent penetrant inspection

      2. Cracked vane outer cluster bonds.

        1. Any number, total one of a complete braze joint for each cluster provided inner cluster bonds are free of cracks

        1. Accept

        2. More than in Step

        1. Reject

      3. Cracked vane inner cluster bonds.

        1. Any number, total a half of a complete braze joint for each cluster provided outer cluster bonds are free of cracks

        1. Accept

        2. More than in Step

        1. Reject

      4. Cracked inner and outer platforms at location A9.

        1. Cracks up to 0.010 in. (0.254 mm) maximum depth

        1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

        2. More than in Step

        1. Reject

      5. Cracked airfoils

      1. Reject

    3. SUBTASK 72-50-22-220-078-A00 Examine the Airfoil, Inner and Outer Annulus/Gaspath Surfaces of the Stage 4 Turbine Vanes for Coating Damage

      1. Damaged or not sufficient coating.

        1. Damaged or not sufficient coating in areas total less than 1.00 sq in (645.16 sqmm) per vane airfoil

        1. Repair, VRS4258 TASK 72-50-22-300-033 (REPAIR-033).

        2. Other than in Step

        1. Repair, VRS4260 TASK 72-50-22-300-035 (REPAIR-035).

      2. Sulphide, burned surfaces. Do the heat tint test.

        1. Do the heat tint test

        1. The SPM TASK 70-28-00-280-501 and SPM TASK 70-28-01-280-501 Repair, VRS4260 TASK 72-50-22-300-035 (REPAIR-035) or Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

    4. SUBTASK 72-50-22-220-078-B00 Examine the Stage 4 Turbine Vanes at Location A1 to A9 for Surface Damage

    1. Refer to Figure

      2. Examine the surface at location A1.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.020 in. (0.508 mm) maximum depth, up to 10 percent of area A1

          1. Accept

          2. Nicked, pitted up to 0.005 in. (0.127 mm) maximum depth, no raised material

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      3. Examine the surface at location A2.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.010 in. (0.254 mm) maximum depth

          1. Accept

          2. Nicked, pitted up to 0.005 in (0.127 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Reject

      4. Examine the surface at location A3.

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

          1. Up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          2. More than in Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

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

          1. Up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          2. One round bottom dent per airfoil up to 0.010 in. (0.254 mm) maximum depth, no coating cracks

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      5. Examine the surface at location A4.

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

          1. Up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          2. More than in Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

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

          1. Up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          2. Bent up to 0.020 in. (0.508 mm) maximum deflection and 0.700 in. (17.780 mm) total maximum length each airfoil

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      6. Examine the surface at location A5.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.010 in. (0.254 mm) maximum depth

          1. Accept

          2. Nicked, pitted up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      7. Examine the surface at location A6.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.020 in. (0.508 mm) maximum depth, not visible from other side, up to 10 percent of surface of area A6

          1. Accept

          2. Nicked, pitted up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      8. Examine the surface at location A7.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.010 in. (0.254 mm) maximum depth

          1. Accept

          2. Nicked, pitted up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Reject

      9. Examine the surface at location A8.

        1. Nicked, dented, pitted.

          1. Round bottom dents up to 0.020 in. (0.508 mm) maximum depth, not visible from other side, up to 10 percent of area A8

          1. Accept

          2. Nicked, pitted up to 0.005 in. (0.127 mm) maximum depth

          1. Accept

          3. More than in Step or Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

      10. Examine the surface at location A9.

        1. Nicked, dented, pitted

          1. Any number, no raised material. Up to 0.010 in (0.254 mm) maximum depth

          1. Accept

          2. More than in Step

          1. Repair, VRS4058 TASK 72-50-22-300-019 (REPAIR-019).

    5. SUBTASK 72-50-22-220-079 Examine the Stage 4 Turbine Vanes Inner Honeycomb Seal

      1. Unbonding.

        1. Any quantity unbonded from vane

        1. Repair, VRS4059 TASK 72-50-22-300-020 (REPAIR-020).

      2. Wear. Use dial gage, dial indicator with ball insert and dial caliper.

        1. Smooth wear pattern, 0.394in. (10.00 mm) maximum width and 0.060 in. (1.5 mm) maximum depth

        1. Accept

        2. More than in Step

        1. Repair, VRS4059 TASK 72-50-22-300-020 (REPAIR-020).

    6. SUBTASK 72-50-22-220-081 Examine the Inner and the Outer Platform End Faces of the Stage 4 Turbine Vanes for Wear

      1. Fretted. Use dial gage and dial indicator with needle insert.

        1. 0.002 in. (0.051 mm) maximum depth

        1. Accept

        2. More than in Step

        1. Reject

    7. SUBTASK 72-50-22-220-082 Examine the Stage 4 Turbine Vanes at Location D2

    1. Refer to Figure

      2. Worn. Use dial caliper.

        1. Between 0.3201 and 0.3141 in. (8.13 and 7.98 mm)

        1. Accept

        2. Other than in Step

        1. Repair, VRS4064 TASK 72-50-22-300-023 (REPAIR-023).

    8. SUBTASK 72-50-22-220-083 Examine the Stage 4 Turbine Vanes at Location D3

    1. Refer to Figure

      2. Worn. Use small hole gage and external micrometer.

        1. Between 0.158 and 0.150 in. (4.01 and 3.81 mm)

        1. Accept

        2. Other than in Step

        1. Repair, VRS4062 TASK 72-50-22-300-021 (REPAIR-021).

    9. SUBTASK 72-50-22-220-084 Examine the Stage 4 Turbine Vanes at Location D4

    1. Refer to Figure

      2. Worn. Use dial caliper.

        1. Between 0.131 and 0.125 in. (3.33 to 3.18 mm)

        1. Accept

        2. Other than in Step

        1. Repair, VRS4063 TASK 72-50-22-300-022 (REPAIR-022).

    10. Figure: Examine the stage 4 turbine vanes

    Examine the stage 4 turbine vanes

    Figure: Examine the stage 4 turbine vanes

    Examine the stage 4 turbine vanes

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Correction of sequence

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Dial caliper
Tool Name:Dial caliper
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