TASK 72-00-50-220-003 LPT Module - Examine The Turbine Exhaust Case At Interface N-50/50, Inspection-003

DMC:V2500-A0-72-00-5000-02A-300A-B|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 72-00-50-220-003 LPT Module - Examine The Turbine Exhaust Case At Interface N-50/50, Inspection-003

General

Refer to TASK 72-00-00-200-000 (INSPECTION/CHECK-000) (Examine the modular/non-modular interfaces), before you do this TASK.

The policy that is necessary for inspection is given in SPM TASK 70-20-01-200-001 .

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

NameManufacturerPart Number / IdentificationQuantityRemark
Flexible video borescope (4 mm - 6 mm)LOCALFlexible video borescope (4 mm - 6 mm)

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-50-220-090 Examine the Turbine Exhaust Case Front Face at Location 1

    1. Refer to Figure.

      2. Mating surface.

        1. Cracked

        1. Reject

        2. Distorted

          1. In 0.0315 in. (0.80 mm) above or below the initial contour

          1. Accept

          2. More than Step

          1. Reject

        3. Nicked or scratched.

          1. Not more than 0.0118 in. (0.30 mm) in depth. Not extended more than 3/4 of the mating surface

          1. Accept

          2. More than Step

          1. Reject

    2. SUBTASK 72-00-50-220-091 Examine the Turbine Exhaust Case Front Face Bolt Holes at Location 2

    1. Refer to Figure.

      2. Holes.

        1. Cracked.

          1. Four non adjacent

          1. Accept

          2. More than Step

          1. Reject

    3. SUBTASK 72-00-50-220-092 V2500-A1 ONLY Examine the Turbine Exhaust Case Front Face Static Journey at Location 3

    1. Refer to Figure.

      2. Abradable coat.

        1. Cracked

        1. Reject

        2. Evidence of blistering, lifting, transfer cracks or chipping

        1. Reject

    4. SUBTASK 72-00-50-220-174-A00 V2500-A1 ONLY Examine the Turbine Exhaust Case No.5 Bearing Oil Service Lines at Location 4 and 5 for Coking using a Flexible Video Boroscope (Pre SBE 72-0063)

    1. Refer to Figure.

      2. Internal surface of tube. The inside of the tubes must appear smooth, round and free of coke nodules or flakes, and loose coke particles.

        1. No coking

        1. Accept

        2. Coking

        1. Clean TASK 72-50-53-100-010 (CLEANING-010, CONFIG-001). Examine adjacent tubes, connectors and oil jets for blockage or coking. Refer to 72-50-51 and 72-50-53 (CMM)

    5. SUBTASK 72-00-50-220-174-B00 Examine the No.5 Bearing Oil Tubes at Location 3 and 4 (SBE 72-0063)

    1. Refer to Figure.

      2. Examine the internal surfaces of the tubes with flexible video borescope. The inside of the tubes must appear smooth, round and free of coke nodules or flakes.

        1. Coking

        1. Clean, refer to CMM-THD-V2500-1IA, TASK 72-50-53-100-102 (CLEANING-002, CONFIG-001) and TASK 72-50-53-100-103 (CLEANING-003, CONFIG-001). Examine adjacent tubes, connectors and oil jets for blockage or coking. Refer to 72-50-53, 72-58-02 and 79-21-49 (CMM)

    6. SUBTASK 72-00-50-220-247 Examine All Surfaces of the Turbine Exhaust Case for Corrosion

      1. Surface corrosion

      1. Accept. You can remove corrosion with a wire brush or steel wool

    7. SUBTASK 72-00-50-220-237 Examine the Internal Surfaces of the Tube Elbow at Locations 5 and 6 (SBE 72-0063)

    1. Refer to Figure.

      2. Examine the internal surfaces of the tube elbow with flexible video borescope.

        1. Coking

        1. Clean, refer to CMM-THD-V2500-1IA, TASK 72-50-53-200-104 and TASK 72-50-53-200-105 . Examine adjacent tubes, connectors and restrictors for blockage or coking. Refer to 79-21-49 and 79-22-49 (CMM)

    8. SUBTASK 72-00-50-220-238 Examine the Strainer Element for Coking or Blockages at Location 1 (SBE 72-0063)

    1. Refer to Figure.

      2. Examine the strainer element for coking or blockages.

        1. Coking or blockages

        1. Reject. Examine adjacent tubes, connectors for coking or blockages. Refer to 79-21-49

    9. SUBTASK 72-00-50-220-239 Examine the Restrictor for Coking or Blockages at Location 2 (SBE 72-0063)

    1. Refer to Figure.

      2. Examine the strainer element for coking or blockages.

        1. Coking or blockages

        1. Reject. Examine adjacent tubes, connectors for coking or blockages. Refer to 79-21-49

    10. Figure: Pre SBE 72-0063 V2500-A1: Locations at interface N-50/50

    Sheet 1

    Legend
    Pre SBE 72-0063 V2500-A1: Locations at interface N-50/50

    Sheet 1

    Close

    Figure: SBE 72-0063: Locations at interface N-50/50

    Sheet 2

    Legend
    SBE 72-0063: Locations at interface N-50/50

    Sheet 2

    Close

    Figure: SBE 72-0063: Locations at interface N-50/50

    Sheet 3

    Legend
    SBE 72-0063: Locations at interface N-50/50

    Sheet 3

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Flexible video borescope (4 mm - 6 mm)
Tool Name:Flexible video borescope (4 mm - 6 mm)