TASK 72-41-14-200-001-B00 HPC Rear Rotating Air Seal - Examine, Inspection-001

DMC:V2500-A0-72-41-1400-00B-300A-B|Issue No:002.00|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-B00 HPC Rear Rotating Air Seal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-800

6A4113

General

This TASK gives the procedure to examine the HP compressor rotating air seal. 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.

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.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified must be referred to IAE.

A ** following 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 date.

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/SUBTASK 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 70-20-01-200-501.

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 72-41-14-230-056 Examine the HP Compressor Rotating Air Seal for Cracks

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

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

        PART IDENT

        TASK/SUBTASK

        HP compressor rotating air seal

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-14-230-068 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 72-41-14-200-003, Subtask 72-41-14-230-064.

    3. SUBTASK 72-41-14-220-063 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 in Step

        1. Reject

    4. SUBTASK 72-41-14-220-090 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.

      3. Bedding witness or mark to no discernible depth

      1. Accept

      4. Up to 0.001 in. (0.03 mm)

      1. Accept

      5. More than in Step

      1. Reject

      6. Scored or scratched

      1. Reject

    5. SUBTASK 72-41-14-220-064 Examine the HP Compressor Rotating Air Seal Locking Slots at Location 1

    1. Refer to Figure.

      2. Nicked, galled, scratched or dented

      1. Reject

    6. SUBTASK 72-41-14-220-065 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.

      3. Bedding witness or mark to no discernable depth

      1. Accept

      4. Up to 0.001 in. (0.03 mm)

      1. Accept

      5. More than in Step

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

      6. Scored or scratched

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

    7. SUBTASK 72-41-14-220-066 Examine the HP Compressor Rotating Air Seal Bolt Holes at Locations 4 and 5

    1. NOTE

      There are a total of 36 bolt holes of two different diameters.

      Refer to Figure.

      2. Burred or scored

      1. Reject

    8. SUBTASK 72-41-14-220-067 Examine the HP Compressor Rotating Air Seal Front Location Diameter at Location 1008

    1. Refer to Figure.

      2. Galled or scored

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

      3. Examine the front location diameter

        1. If the diameter is between 10.138 and 10.140 in. (257.50 and 257.55 mm)

        1. Accept

      2. Write down the dimension of the diameter

        3. If the diameter is less than 10.138 in. (257.50 mm)

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

    9. SUBTASK 72-41-14-220-068 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 in Step but within the limits of VRS6145

        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.

        NOTE

        One of the seal fin diameters can be less than the limit given in Step, Step, Step65, 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

            1. If the value is between 9.204 and 9.219 in. (233.776 and 234.170 mm)

            1. Accept

            2. Less than 9.204 in. (233.776 mm)

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

        2. Location 1401B.

          1. Refer to the values written in TASK 72-41-10-040-001

            1. If the value is between 8.991 and 9.007 in. (228.376 and 228.770 mm)

            1. Accept

            2. Less than 8.991 in. (228.376 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

            1. If the value is between 8.779 and 8.794 in. (222.976 and 223.370 mm)

            1. Accept

            2. Less than 8.779 in. (222.976 mm)

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

    10. SUBTASK 72-41-14-220-069 Examine the HP Compressor Rotating Air Seal Rub Track at Location 6

    1. Refer to Figure.

      2. Chipped.

        1. Chipped up to 10 percent of total width, 25 percent of the circumference and 0.004 in. (0.10 mm) in depth along the edges

        1. Accept

        2. More than in Step

        1. Repair, VRS6505 TASK 72-41-14-300-008

      3. Pitted.

        1. Pitted in brush seal rub track

        1. Repair, VRS6505 TASK 72-41-14-300-008

        2. Scattered pits in other areas up to 0.025 in. (0.64 mm) in diameter and 0.004 in. (0.10 mm) in depth

        1. Accept

        3. More than in Step

        1. Repair, VRS6505 TASK 72-41-14-300-008

      4. Scratched.

        1. Scratched in brush seal rub track

        1. Repair, VRS6505 TASK 72-41-14-300-008

        2. Scratched in other areas up to 0.002 in. (0.05 mm) in depth and 0.250 in. (6.35 mm) in length

        1. Accept

        3. More than in Step

        1. Repair, VRS6505 TASK 72-41-14-300-008

      5. Ceramic layer.

        1. Loose

        1. Repair, VRS6505 TASK 72-41-14-300-008

        2. Peeled

        1. Repair, VRS6505 TASK 72-41-14-300-008

      6. Worn.

        1. Up to 0.002 in. (0.05 mm) smooth constant wear in brush rub track

        1. Accept

        2. More than in Step

        1. Repair, VRS6505 TASK 72-41-14-300-008

    11. 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 72-41-14-230-068 to link to newly created Task 72-41-14-200-003 for Subtask 72-41-14-230-064 per AD 2004-12-08 and (17VG145)