TASK 71-00-00-810-023 Inspections Of Engines Removed For N2 Overspeed, Fault Isolation-023

DMC:V2500-A0-71-00-0000-00A-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 71-00-00-810-023 Inspections Of Engines Removed For N2 Overspeed, Fault Isolation-023

NOTE

Do a Stage 2 HP Turbine Blade Assembly Blade Length Inspection (SUBTASK 72-45-32-220-074 and SUBTASK 72-45-32-220-092) only if the Stage 1 Turbine Hub, Stage 1 HP Turbine Air Seal (Outer), Stage 1 HP Turbine Air Seal (Inner), Stage 2 Turbine Hub, Stage 2 HP Turbine Air Seal, or the Stage 2 HP Turbine Blade Retaining Plate were scrapped as a result of this procedure.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. Inspections for Engines removed for N2 Overspeed

      1. For an overspeed of 103% N2 or more you must remove and disassemble the engine and complete the TASKs that follow:

      1. Examine the HP Compressor Stage 3 Rotor Blades (Refer to EM TASK 72-41-15-200-001).

      2. Examine the HP Compressor Stage 4 Rotor Blades (Refer to EM TASK 72-41-15-200-002).

      3. Examine the HP Compressor Stage 5 Rotor Blades (Refer to EM TASK 72-41-15-200-003).

      4. Examine the HP Compressor Stage 6 Rotor Blades (Refer to EM TASK 72-41-15-200-004).

      5. Examine the HP Compressor Stage 7 Rotor Blades (Refer to EM TASK 72-41-15-200-005).

      6. Examine the HP Compressor Stage 8 Rotor Blades (Refer to EM TASK 72-41-15-200-006).

      7. Examine the HP Compressor Stage 9 Rotor Blades (Refer to EM TASK 72-41-15-200-007).

      8. Examine the HP Compressor Stage 10 Rotor Blades (Refer to EM TASK 72-41-15-200-008).

      9. Examine the HP Compressor Stage 11 Rotor Blades (Refer to EM TASK 72-41-15-200-009).

      10. Examine the HP Compressor Stage 12 Rotor Blades (Refer to EM TASK 72-41-15-200-010).

      11. Examine the HP Compressor Stages 3 to 8 Discs (Refer to EM TASK 72-41-11-200-001).

      12. Examine the HP Compressor Stages 9 to 12 Discs (Refer to EM TASK 72-41-12-200-002).

      13. Examine the HP Compressor Shaft Assembly (Refer to EM TASK 72-41-13-200-001).

      14. Examine the HP Compressor Rotating Air Seal (Refer to EM TASK 72-41-14-200-001).

      15. Examine the Stage 1 Turbine Hub (Refer to EM TASK 72-45-11-200-001).

      16. Examine the Stage 1 HP Turbine Air Seal, Outer (Refer to EM TASK 72-45-12-200-001).

      17. Examine the Stage 1 HP Turbine Air Seal, Inner (Refer to EM TASK 72-45-13-200-001).

      18. Examine the Stage 2 Turbine Hub (Refer to EM TASK 72-45-31-200-001).

      19. Examine the Stage 2 HP Turbine Air Seal (Refer to EM TASK 72-45-00-200-002).

      20. Examine the Stage 2 HP Turbine Blade Retaining Plate (Refer to EM TASK 72-45-33-200-001).

      21. Examine the Stage 2 HP Turbine Blade Assembly (Refer to EM TASK 72-45-32-200-001).

    2. Check the VSV mechanism. Refer to TASK 72-00-40-700-001.

    3. Check the bleed valve and bleed valve solenoid operation. Refer to TASK 71-00-00-700-066, TASK 71-00-00-700-067, TASK 71-00-00-700-068 and TASK 71-00-00-700-069.

Requirements After Job Completion

Follow-On Conditions

NONE