TASK 71-00-00-810-019-B00 N2 Overspeed, Fault Isolation-019

DMC:V2500-A5-71-00-0000-10C-421A-B|Issue No:001.00|Issue Date:2014-05-01

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

V2500-A5

Common Information

TASK 71-00-00-810-019-B00 N2 Overspeed, Fault Isolation-019

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. TASK 71-00-00-810-019-B00 N2 Overspeed, Fault Isolation-019

      1. N2 Overspeed

        1. Do the necessary overspeed inspection.

          1. For an overspeed of 100% N2 (redline = 14950 rpm) to 100.9% N2 do the steps that follow before the engine is operated again.

          1. NOTE

            No procedure is necessary for a transient overspeed in this band that is not more than 5 seconds.

            Do a check to make sure the rotors are free to move.

          2. Do a visual inspection for unwanted material in the gas path.

          3. If there is no damage, continue to use the engine after you correct the cause of the overspeed and the ground run is satisfactory.

          4. If there is damage, do an inspection by the instructions in the engine manual.

          2. For an overspeed of 101% N2 to 102.9% N2 do the step that follows.

          1. You can continue to use the engine for 60 hours after you do an inspection by the instructions given in A.(1). You can continue to operate the engine for more than 60 hours on the condition that the incident is examined by IAE.

          3. For an overspeed of 103% N2 or more do the step that follows.

          1. You must remove and disassemble the engine and do a complete inspection of the relevant components. Refer to TASK 71-00-00-810-023 for the inspection criteria.

      2. Do a check of the EEC fault messages and do the necessary procedures to correct the defects. Refer to TASK 71-00-00-810-001 for the EEC fault messages.

      3. Do a check of the VSV mechanism. Refer to TASK 72-00-40-700-001.

      4. Do a check of 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