TASK 72-50-00-200-008 LP Turbine (LPT) And Turbine Exhaust Case (TEC) Unit - Examine The Inner Damper Ring, Inspection-008

DMC:V2500-A0-72-50-0000-00A-300A-C|Issue No:001.00|Issue Date:2018-02-01

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 72-50-00-200-008 LP Turbine (LPT) And Turbine Exhaust Case (TEC) Unit - Examine The Inner Damper Ring, Inspection-008

Effectivity

FIG/ITEM

PART NO

01-245

3A2981

General

This TASK gives the procedure for the inspection of the inner damper ring.

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 70-20-00-200-501.

All the parts must be cleaned before any part is examined. Refer to TASK 72-50-00-100-000.

All 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 SUBTASK 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 oversized 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

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501

Inspection of Parts, SPM TASK 70-20-00-200-501

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 72-50-00-230-004 Examine the Inner Damper Ring for Cracks

    1. Clean the parts. Refer to TASK TASK 72-50-00-100-000 (CLEANING-000).

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Inner Damper Ring

        1. Cracked

        1. Reject

    2. SUBTASK 72-50-00-220-004 Examine the Inner Damper Ring for Surface Damage

      1. Nicked, dented

        1. Not more than 0.003 in. (0.08 mm) maximum depth

        1. Accept

        2. More than in Step.

        1. Reject

      2. Scratched

        1. Not more than 0.003 in. (0.08 mm) maximum depth

        1. Accept

        2. More than in Step.

        1. Reject

    3. SUBTASK 72-50-00-220-005 Examine the Inner Damper Ring for Deformation

      1. Deformed

      1. Reject

    4. SUBTASK 72-50-00-220-006 Examine the Inner Damper Ring for Fretting

      1. Fretted

        1. Not more than 0.003 in. (0.08 mm) maximum depth if total not more than 0.590 in. (15.00 mm) in circumference

        1. Accept

        2. More than in Step.

        1. Reject

    5. SUBTASK 72-50-00-220-007 Examine the Inner Damper Ring at Diameter D1

    1. Refer to Figure.

      2. Measure diameter D1 in free condition at 120, 240, and 360 degrees. Get an average dimension.

        1. Not less than 4.961 in. (126.00 mm) but not more than 5.000 in. (127.00 mm) in diameter

        1. Accept

        2. More than in Step.

        1. Reject

    6. Figure: Examine the Inner Damper Ring

    Examine the Inner Damper Ring

Requirements After Job Completion

Follow-On Conditions

NONE