TASK 72-32-83-200-001-B00 LPC Front Case - Examine, Inspection-001

DMC:V2500-A0-72-32-8330-00B-300A-C|Issue No:002.00|Issue Date:2017-02-01

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 72-32-83-200-001-B00 LPC Front Case - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

02-350

5A0458

General

This TASK gives the procedure for the inspection of the LPC front case assembly. For the other LP compressor booster stage vanes parts, refer to TASK 72-32-83-200-000 (INSPECTION-000).

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 the parts must be cleaned before any part is examined. Refer to TASK 72-32-83-100-000 (CLEANING-000).

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 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 numbers are in the SPM.

References

Refer to the SPM for data on these items

Definition of Damages, SPM TASK 70-02-02-350-501

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

Some data on these items are 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 72-32-83-230-066 Examine the LPC Front Case Assembly (02-350) for Cracks

    1. Clean the parts. Refer to TASK 72-32-83-100-000 (CLEANING-000).

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

        PART IDENT

        TASK/SUBTASK

        LPC front case assembly

        1. Cracked

        1. Reject

    2. SUBTASK 72-32-83-220-131 Examine the LPC Front Case Assembly (02-350) All Surfaces

    1. Refer to Figure.

      2. Examine all the surfaces which do not include the identified locations.

        1. Corroded

        1. Repair, VRS1759 TASK 72-32-83-300-037(REPAIR-037)

        2. Pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Nicked

          1. Not more than 0.008 in. (0.20 mm) in depth

          1. Accept

          2. More than 0.008 in. (0.20 mm) in depth

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        4. Scratched.

          1. Not more than 0.008 in. (0.20 mm) in depth

          1. Accept

          2. More than 0.008 in. (0.20 mm) in depth

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        5. Dented.

          1. Not more than 0.008 in. (0.20 mm) in depth

          1. Accept

          2. More than 0.008 in. (0.20 mm) in depth

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

    3. SUBTASK 72-32-83-220-132 Examine the LPC Front Case Assembly (02-350) Diameter

    1. Refer to Figure.

      2. Examine the diameter at location 1.

        1. Worn.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1713 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1713 TASK 72-32-83-300-051 (REPAIR-051)

          2. More than in Step

          1. Reject

        2. Corroded or pitted.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1713 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1713 TASK 72-32-83-300-051 (REPAIR-051)

          2. More than in Step

          1. Reject

        3. Nicked, scratched or dented.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1713 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1713 TASK 72-32-83-300-051 (REPAIR-051)

          2. More than in Step

          1. Reject

    4. SUBTASK 72-32-83-220-133 Examine the LPC Front Case Assembly (02-350) Snap Diameter

    1. Refer to Figure.

      2. Examine the snap diameter at location 2.

        1. Worn.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1761 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1761 TASK 72-32-83-300-038 (REPAIR-038)

          2. More than in Step

          1. Reject

        2. Corroded or pitted.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1761 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1761 TASK 72-32-83-300-038 (REPAIR-038)

          2. More than in Step

          1. Reject

        3. Nicked, scratched or dented.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. NOTE

            Use VRS1761 if the damage can not be removed by VRS1759.

            Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037) or Repair, VRS1761 TASK 72-32-83-300-038 (REPAIR-038)

          2. More than in Step

          1. Reject

    5. SUBTASK 72-32-83-220-134 Examine the LPC Front Case Assembly (02-350) Abradable Coating

    1. Refer to Figure.

      2. Examine the abradable coating at location 3.

        1. Deterioration

        1. Repair, VRS1760 TASK 72-32-83-300-039 (REPAIR-039)

        2. Worn.

          1. Not more than 0.030 in. (0.76 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair, VRS1760 TASK 72-32-83-300-039 (REPAIR-039)

        3. Rubbed.

          1. Not more than 0.030 in. (0.76 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair, VRS1760 TASK 72-32-83-300-039 (REPAIR-039)

        4. Unbonded

        1. Repair, VRS1760 TASK 72-32-83-300-039 (REPAIR-039)

    6. SUBTASK 72-32-83-220-135 Examine the LPC Front Case Assembly (02-350) Faces

    1. Refer to Figure.

      2. Examine the face A at location 4.

        1. Galled

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        2. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Nicked, scratched or dented

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

      3. Examine the face B at location 5.

        1. Galled

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        2. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Nicked, scratched or dented

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

    7. SUBTASK 72-32-83-220-136 Examine the LPC Front Case Assembly (02-350) Groove

    1. Refer to Figure.

      2. Examine the groove at location 6.

        1. Worn.

          1. If the width of the groove is between 0.1024 and 0.1062 in. (2.60 and 2.70 mm)

          1. Accept

          2. More than 0.1062 in. (2.70 mm)

          1. Reject

        2. Scratched

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

    8. SUBTASK 72-32-83-220-137 Examine the LPC Front Case Assembly (02-350) Bolt Holes

    1. Refer to Figure.

      2. Examine the bolt holes at locations 7 and 11.

        1. Galled

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        2. Burred edges

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        4. Nicked, scratched or dented

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        5. More than the repairable limits of VRS1759 in Step, Step, Step and Step.

        1. Repair, VRS1616 TASK 72-32-83-300-061 (REPAIR-061).

        6. More than the repairable limits of VRS1616 in Step.

        1. Reject.

    9. SUBTASK 72-32-83-220-138 Examine the LPC Front Case Assembly (02-350) Diameter

    1. Refer to Figure.

      2. Examine the diameter at location 8.

        1. Worn.

          1. Not more than 0.006 in. (0.15 mm) in depth

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

          2. More than in Step

          1. Reject

        2. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Nicked, scratched or dented

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

    10. SUBTASK 72-32-83-220-190 Examine the LPC Front Case Assembly (02-350) Nuts

    1. Refer to Figure.

      2. Examine the nuts at location 9.

        1. Loose or missing.

          1. Not more than 3 places per flange, if two consecutive nuts are not damaged

          1. Accept

          2. More than in Step

          1. Repair, VRS1382 TASK 72-32-83-300-007 (REPAIR-007)

        2. Crossed.

          1. Not more than 3 places per flange, if two consecutive nuts are not damaged

          1. Accept

          2. More than in Step

          1. Repair, VRS1382 TASK 72-32-83-300-007 (REPAIR-007)

        3. Stripped threads.

          1. Not more than 3 places per flange, if two consecutive nuts are not damaged

          1. Accept

          2. More than in Step

          1. Repair, VRS1382 TASK 72-32-83-300-007 (REPAIR-007)

    11. SUBTASK 72-32-83-220-192 Examine the LPC Front Case Assembly (02-350) Front Inner Surface

    1. Refer to Figure.

      2. Examine the Front Inner Surface at Location 10.

        1. Corroded or pitted

        1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        2. Nicked, scratched or dented.

          1. Not more than 0.008 in. (0.20 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

        3. Rubbed or gouged.

          1. Not more than 0.008 in. (0.20 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair, VRS1759 TASK 72-32-83-300-037 (REPAIR-037)

    12. SUBTASK 72-32-83-220-258 Examine the LPC Front Case Assembly (02-350) Locating Pins

    1. Refer to Figure.

      2. Examine the locating pins at Location 12.

        1. Corroded, pitted, loose or missing

        1. Repair, VRS1379 TASK 72-32-83-300-060 (REPAIR-060)

    13. Figure: Locations on the LPC Front Case Assembly

    Locations on the LPC Front Case Assembly

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to add repairable limits. (92VJ863I)