TASK 72-41-14-200-001-C00 HPC Rear Rotating Air Seal - Examine, Inspection-001

DMC:V2500-A0-72-41-1400-00C-300A-B|Issue No:003.00|Issue Date:2017-11-01

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 72-41-14-200-001-C00 HPC Rear Rotating Air Seal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-800

6A4392

01-800

6A5869

General

This TASK gives the procedure to examine the HP compressor rotating air seals you must make sure that this TASK is applicable to the part that is to be examined. Refer to TASK 72-41-14-200-000 (INSPECTION-000).

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

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 oversise 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,

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

CAUTION

THE WORD FOCUS, SPECIFIED IN SUBTASK TITLES, INDICATES CRITICAL LOCATIONS ON COMPONENTS TO WHICH SPECIAL ATTENTION MUST BE GIVEN.

Procedure

    1. SUBTASK 72-41-14-230-058 Examine the HP Compressor Rotating Air Seal for Cracks

    1. Clean the parts. Refer to TASK 72-41-14-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts given below.

        PART IDENT

        TASK/SUBTASK

        SPM TASK

        HP compressor rotating air seal

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-14-230-069 Focus Inspect the HP Compressor Rotating Air Seal for Cracks

    1. Do a Focused Inspection of the HP Compressor Rotating Air Seal for Cracks according to TASK 72-41-14-200-004, Subtask 72-41-14-230-065.

    3. SUBTASK 72-41-14-220-074 Examine the HP Compressor Rotating Air Seal for Damage

      1. Nicks, dents and high metal

        1. General nicks, dents and high metal within the limits of VRS6089

        1. Repair, VRS6089 TASK 72-41-14-300-001 (REPAIR-001)

        2. More than Step

        1. Reject

    4. SUBTASK 72-41-14-220-075 Examine the HP Compressor Rotating Air Seal Location Diameter at Location 1

    1. Refer to Figure.

      2. Galled or scored

      1. Repair, VRS6144 TASK 72-41-14-300-002 (REPAIR-002)

      3. Worn.

        1. If the diameter is between 9.7630 in. and 9.7650 in. (247.979 mm and 248.030 mm).

        1. Accept.

        2. If the diameter is less than 9.7630 in. (247.979 mm).

          NOTE

          This part can be used only if the mating part has a diameter that will result in fit of reference No. 1008. Refer to TASK 72-41-10-440-002-B00.

        1. Accept the part for select fit only.

        3. Other than Step.

        1. Repair, VRS6144 TASK 72-41-14-300-002 (REPAIR-002).

    5. SUBTASK 72-41-14-220-091 Examine the HP Compressor Rotating Air Seal Location Face at Location 2

    1. NOTE

      HP Compressor Rotating Air Seals that have been in service may show areas of bedding.

      Refer to Figure.

      2. Galled or fretted.

        1. Bedding witness or mark to no discernable depth.

        1. Accept.

        2. Up to 0.001 in. (0.03 mm).

        1. Accept.

        3. More than in Step.

        1. Reject.

      3. Scored or scratched.

      1. Reject.

    6. SUBTASK 72-41-14-220-076 Examine the HP Compressor Rotating Air Seal Location Face at Location 3

    1. NOTE

      HP compressor rotating air seals that have been in service may show areas of bedding.

      Refer to Figure.

      2. Galled or fretted.

        1. Bedding witness or mark to no discernable depth.

        1. Accept.

        2. Up to 0.001 in. (0.03 mm).

        1. Accept.

        3. More than in Step.

        1. Repair VRS6656 TASK 72-41-14-300-009 (REPAIR-009).

      3. Scored or scratched.

      1. Repair VRS6656 TASK 72-41-14-300-009 (REPAIR-009).

    7. SUBTASK 72-41-14-220-077 Examine the HP Compressor Rotating Air Seal Bolt Holes at Location 4

    1. Refer to Figure.

      2. Burred or scored

      1. Reject

    8. SUBTASK 72-41-14-220-078 Examine the HP Compressor Rotating Air Seal Seal Fins at Location 1401

    1. Refer to Figure.

      2. Scored or burred.

        1. Within the limits of VRS6147.

        1. Repair, VRS6147 TASK 72-41-14-300-004 (REPAIR-004).

        2. More than Step but within the limits of VRS6492.

        1. Repair, VRS6492 TASK 72-41-14-300-007 (REPAIR-007).

        3. More than in Step.

        1. Reject.

      3. NOTE

        If the seal fins are accepted, write down the value of the diameters of the seal fins. These values are used during module assembly.

        NOTE

        One of the seal fin diameters can be less than the limit given in Step, Step, Step, Step, if the other seal fins are within the limits. The worn seal fin must be machined to remove defects.

        Worn.

        1. Location 1401A.

          1. Refer to the values written in TASK 72-41-10-040-001-B00 (DISASSEMBLY-001, CONFIG-002).

            1. If the values is between 7.539 and 7.546 in. (191.49 and 191.67 mm)

            1. Accept

            2. Less than 7.539 in. (191.49 mm)

            1. Repair, VRS6492 TASK 72-41-14-300-007 (REPAIR-007)

        2. Location 1401B.

          1. Refer to the values written in rev. TASK 72-41-10-040-001-B00 (DISASSEMBLY-001, CONFIG-002)

            1. If the value is between 7.326 and 7.333 in. (186.08 and 186.27 mm)

            1. Accept

            2. Less than 7.326 in. (186.08 mm)

            1. Repair, VRS6492 TASK 72-41-14-300-007 (REPAIR-007)

        3. Location 1401C.

          1. Refer to the values written in TASK 72-41-10-040-001-B00 (DIASSEMBLY-001, CONFIG-002)

            1. If the value is between 7.113 and 7.121 in. (180.67 and 180.87 mm)

            1. Accept

            2. Less than 7.113 in. (180.67 mm)

            1. Repair, VRS6492 TASK 72-41-14-300-007 (REPAIR-007)

        4. Location 1401D.

          1. Refer to the values written in TASK 72-41-10-040-001-B00 (DISASSEMBLY-001, CONFIG-002)

            1. If the value is between 6.901 and 6.908 in. (175.28 and 175.47 mm)

            1. Accept

            2. Less than 6.901 in. (175.28 mm)

            1. Repair, VRS6492 TASK 72-41-14-300-007 (REPAIR-007)

    9. Figure: HP compressor rotating air seal - inspection locations

    HP compressor rotating air seal - inspection locations

    Figure: Focused Inspection - Rear rotating seal

    Focused Inspection - Rear rotating seal

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Updated SUBTASK 72-41-14-230-069 to link to newly created Task 72-41-14-200-004 for Subtask 72-41-14-230-065 per AD 2004-12-08 and (17VG145)