TASK 72-41-33-200-007 HPC Variable Stator Vane Shroud Bushes - Examine, Inspection-007

DMC:V2500-A0-72-41-3331-00A-920A-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 72-41-33-200-007 HPC Variable Stator Vane Shroud Bushes - Examine, Inspection-007

Effectivity

FIG/ITEM PART NO.

01-190

6A3497

01-190

6A7728

01-190

6B1137

02-190

6A3497

02-190

6A7728

02-190

6B1137

03-190

6A3497

03-190

6A7728

03-190

6B1137

04-190

6A3497

04-190

6A7728

04-190

6B1137

General

This TASK gives the procedure for the inspection of the inner pivot bushes.

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 the 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 the 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 can be shown to be necessary at a subsequent 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 number 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 70-20-01-200-501.

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 72-41-33-230-057 Examine the Inner Pivot Bushes for Cracks

    1. Clean the parts. Refer to TASK 72-41-33-100-000.

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

        PART IDENT TASK/SUBTASK

        Inner pivot bushes

        SPM TASK 70-23-02-230-501

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-33-220-095 Examine the Inner Pivot Half Bush (6A3497) Surfaces at Location 1 (Pre SBE 72-0410)

    1. Refer to Figure.

      2. Scored.

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

        1. Accept

        2. More than in step B.(1)

        1. Repair VRS6275, TASK 72-41-33-300-012 (REPAIR-012)

      3. Wear.

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

        1. Accept

        2. More than in step C.(1)

        1. Repair VRS6275, TASK 72-41-33-300-012 (REPAIR-012)

    3. SUBTASK 72-41-33-220-096-A00 Examine the Inner Pivot Bush Flanges at Location 2 and 3 (Pre SBE 72-0410)

    1. Refer to Figure.

      2. Wear.

        1. If the flange thickness is between 0.055 to 0.056 in. (1.40 to 1.43 mm)

        1. Accept

        2. Less than in step B.(1)

        1. Reject

      3. Scored.

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

        1. Accept

        2. More than in step C.(1)

        1. Repair VRS6275, TASK 72-41-33-300-012 (REPAIR-012)

    4. SUBTASK 72-41-33-220-096-B00 Examine the Inner Pivot Bush Flanges at Location 2 and 3 (SBE 72-0410 and SBE 72-0560)

    1. SBE 72-0410: Engine - HP compressor variable vane inner shrouds - Introduction of revised one piece bushes

      SBE 72-0560: Engine - HP compressor - V2500 SelectOne Retrofit and Production - HP compressor upgrade

    2. Refer to Figure.

      3. Wear.

        1. If the flange thickness is between 0.0550 to 0.0567 in. (1.400 to 1.440 mm)

        1. Accept

        2. Less than in step B.(1)

        1. Reject

      4. Scored.

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

        1. Accept

        2. More than in step C.(1)

        1. Repair VRS6275, TASK 72-41-33-300-012 (REPAIR-012)

    5. SUBTASK 72-41-33-220-102 Examine the Inner Pivot Bush Bore and Surface at Locations 4 and 5

    1. Refer to Figure.

      2. Visible signs of wear

      1. Reject

        2. Scored.

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

          1. Accept

          2. More than in step C.(1)

          1. Reject

    6. SUBTASK 72-41-33-220-213-A00 Examine the Inner Pivot Bush Outer Diameter at Location 6 (SBE 72-0410)

    1. SBE 72-0410: Engine - HP compressor variable vane inner shrouds - Introduction of revised one piece bushes.

      2. Refer to Figure.

        1. If the diameter is between 0.3946 and 0.3957 in. (10.024 and 10.050 mm)

        1. Accept

        2. Other than (1)

        1. Reject

    7. SUBTASK 72-41-33-220-213-B00 Examine the Inner Pivot Bush Outer Diameter at Location 6 (SBE 72-0560)

    1. SBE 72-0560: Engine - HP compressor - V2500 SelectOne Retrofit and Production - HP compressor upgrade

      2. Refer to Figure.

        1. If the diameter is between 0.3954 and 0.3964 in. (10.044 and 10.070 mm)

        1. Accept

        2. Other than (1)

        1. Reject

    8. Figure: Inner Pivot Bushes and Half Bushes - Inspection Locations

    Inner Pivot Bushes and Half Bushes - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE