TASK 72-41-32-200-003 HPC Stage 4 Variable Stator Vane - Examine, Inspection-003

DMC:V2500-A0-72-41-3204-00A-300A-C|Issue No:005.00|Issue Date:2019-05-01

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 72-41-32-200-003 HPC Stage 4 Variable Stator Vane - Examine, Inspection-003

Effectivity

FIG/ITEM

PART NO.

03-500

6A3816

03-500

6A3880

03-500

6A4370

03-500

6A5679

03-500

6A7478

03-500

6A7558

03-500

6A8069

03-500

6A8064

General

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

Nicks and dents 0.005 in. (0.13 mm) or less are acceptable without limit to the airfoil and gas washed surfaces of the platforms.

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the EIPC.

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

All the parts must be cleaned before any part is examined.

All the 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 the 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/SUBTASK numbers are in SPM.

References

Refer to SPM for data on these items.

Definition of Damage, TASK 70-02-02-350-501

Inspection of Parts, TASK 70-20-01-200-501.

Some data on these items is contained in this TASK. For more data on these items refer to 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 72-41-32-230-053 Examine the Stage 4 Variable Stator Vanes for Cracks, (03-500)

    1. Clean the parts. Refer to TASK 72-41-32-100-000 (CLEANING-000).

      2. Do the test for cracks on the part that is given below.

        PART IDENT

        TASK/SUBTASK

        Stage 4 Variable Stator Vanes

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-41-32-220-071 Examine the Stage 4 Variable Stator Vanes at Location 1, (03-500)

    1. Refer to Figure.

      2. Nicked.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      3. Dented.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      4. Scratched.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Repair, VRS6035 TASK 72-41-32-300-005 (REPAIR-005).

      5. Pitted.

        1. Isolated pitting up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. Heavy pitting up to 0.005 in. (0.13 mm) in depth.

        1. Repair, VRS6035 TASK 72-41-32-300-005 (REPAIR-005).

    3. SUBTASK 72-41-32-220-072-001 Examine the Stage 4 Variable Stator Vanes Surfaces at Locations 2, 3 and 4, (03-500, 6A3816, 6A3880, 6A4370, 6A5679 and 6A7478) (Pre SBE 72-0410)

    1. Refer to Figure.

      2. Scored/Scratched.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      3. Wear.

      1. Reject.

    4. SUBTASK 72-41-32-220-072-002 Examine the Stage 4 Variable Stator Vanes Surfaces at Locations 3 and 4, (03-500, 6A7558, 6A8069 and 6A8064) (SBE 72-0410 and SBE 72-0422)

    1. Refer to Figure.

      2. Scored/Scratched.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      3. Wear.

      1. Reject.

    5. SUBTASK 72-41-32-220-073 Examine the Stage 4 Variable Stator Vanes Leading and Trailing Edges at Locations 5 and 6, (03-500)

    1. Refer to Figure.

      2. Nicked.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      3. Dents.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      4. Scored/Scratched.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Repair, VRS6035 TASK 72-41-32-300-005 (REPAIR-005).

    6. SUBTASK 72-41-32-220-074-001 Examine the Stage 4 Variable Stator Vanes Airfoil Surface Finish at Location 1, (03-500, 6A3816, 6A3880, 6A4370, 6A5679, 6A7558, 6A8069 and 6A8064) (Pre SBE 70-0714, SBE 70-0726, SBE 72-0410 and SBE 72-0422)

    1. Refer to Figure.

      NOTE

      A Tallysurf measuring instrument must not be used.

      2. Measure the surface finish of the vanes. Use 10 percent of the vanes that have been removed.

        1. Roughness up to 30 micro-inches (0.80 micrometers).

        1. Accept.

        2. More than Step.

        1. Repair, VRS6077 TASK 72-41-32-300-006 (REPAIR-006).

    7. SUBTASK 72-41-32-220-074-002 Examine the Stage 4 Variable Stator Vanes Airfoil Surface Finish at Location 1, (03-500, 6A7478) (SBE 70-0714)

    1. Refer to Figure.

      2. Surface finish.

        1. Roughness of 10 micro-inches (0.25 micrometers) or less.

        1. Accept.

        2. More than in Step.

        1. Reject.

    8. SUBTASK 72-41-32-220-075 Examine the Stage 4 Variable Stator Vanes Spindle at Location 7, (03-500)

    1. Refer to Figure.

      2. Scored/Scratched.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than Step.

        1. Repair, VRS6183 TASK 72-41-32-300-014 (REPAIR-014) or VRS9130 TASK 72-41-32-300-019 (REPAIR-019).

      3. Wear.

        1. If the diameter of the spindle is not less than 0.468 in. (11.90 mm).

        1. Accept.

        2. If the diameter of the spindle is between 0.4585 in. to 0.468 in. (11.646 mm to 11.90 mm).

        1. Repair, VRS6183 TASK 72-41-32-300-014 (REPAIR-014).

        3. If the diameter of the spindle is less than 0.4585 in. (11.646 mm).

        1. Repair, VRS9130 TASK 72-41-32-300-019 (REPAIR-019).

      4. Spindle flat.

        1. Wear.

        1. Reject.

        2. Scored/Scratched.

        1. Reject.

    9. SUBTASK 72-41-32-220-076 Examine the Stage 4 Variable Stator Vanes Stud at Location 8, (03-500)

    1. Refer to Figure.

      2. Thread.

        1. Crossed.

        1. Reject.

        2. Stripped.

        1. Reject.

        3. Pick-up.

        1. Reject.

    10. SUBTASK 72-41-32-220-077 Examine the Stage 4 Variable Stator Vanes Inner Pivot Spindle at Location 1229, (03-500)

    1. Refer to Figure.

      2. Scored/Scratched.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6183 TASK 72-41-32-300-014 (REPAIR-014) or VRS9130 TASK 72-41-32-300-019 (REPAIR-019).

      3. Wear.

        1. If the diameter is not less than 0.271 in. (6.88 mm).

        1. Accept.

        2. If the diameter of the spindle is between 0.2609 in. to 0.271 in. (6.627 mm to 6.88 mm).

        1. Repair, VRS6183 TASK 72-41-32-300-014 (REPAIR-014).

        3. If the diameter of the spindle is less than 0.2609 in. (6.627 mm).

        1. Repair, VRS9130 TASK 72-41-32-300-019 (REPAIR-019).

    11. SUBTASK 72-41-32-220-078 Examine the Stage 4 Variable Stator Vanes Seal Ring Groove at Location 10, (03-500)

    1. Refer to Figure.

      2. Wear.

      1. Reject.

      3. Damaged.

      1. Reject.

    12. SUBTASK 72-41-32-220-171 Examine the Stage 4 Variable Stator Vanes Annulus Surfaces at Locations 11 and 12, (03-500, 6A7478) (SBE 70-0714)

    1. Refer to Figure.

      2. Nicked.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      3. Dented.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      4. Surface finish.

        1. Roughness of 16 micro-inches (0.40 micrometers) or less.

        1. Accept.

        2. More than in Step.

        1. Reject.

    13. SUBTASK 72-41-32-220-175 Examine the Stage 4 Variable Stator Vanes at Location 13 (02-500 and 03-500)

    1. Refer to Figure.

      2. Examine the engraved identity markings.

        1. Identity markings not encroaching into the fillet radius.

        1. Accept.

        2. Other than Step.

        1. Reject.

    14. Figure: Stage 4 Variable Stator Vanes - Inspection Locations

    Stage 4 Variable Stator Vanes - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update repair reference. (18VG053)