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 71-00-00-700-008-B00 Test No. 8 (A5) - Vibration Survey, Testing-008
General
Instructions to operate the engine, engine safety precautions, and other general information are found in Engine Safety Precautions and Engine Operation Limits, Guidelines, and Special Precautions. Refer to TASK 71-00-00-700-050-B00 (TESTING-000, CONFIG-002) and TASK 71-00-00-700-051-B00 (TESTING-000, CONFIG-002).
You can use this test to make an analysis of the vibration characteristics of an engine.
It is optional, but you can install a vibration bracket and pickup on the turbine exhaust case.
Vibration Survey
Do the necessary steps by the instructions in Pre-Rig the Engine for Testing. Refer to TASK 71-00-00-700-020 (TESTING-020).
Start the engine by the instructions given for an automatic or manual engine start. Refer to the Normal Engine Automatic Start Procedure or the Normal Engine Manual Start Procedure, TASK 71-00-00-700-053-B01 (TESTING-000, CONFIG-002) and TASK 71-00-00-700-053-B02 (TESTING-000, CONFIG-002).
Do not continue to operate the engine if any indications are unusual.
Operate the engine at MIN IDLE for five minutes.
Slowly increase the engine speed to Band C or higher for three minutes (to let the engine become thermally stable). Refer to Figure.
Go back to MIN IDLE for six minutes.
Prepare to make a record of data from the vibration sensor pickup(s).
Do an acceleration and deceleration as follows:
Slowly increase the engine speed and set the thrust to the applicable Band A*. Refer to Figure.
* Band A that is applicable for the V2535-A5 model is defined as any A5 engine with serial number V10198 and greater.
* V2530-A5 model Band A is defined as any A5 engine with serial number V10197 and lower.
Operate the engine for five minutes with the thrust lever set in one position.
Make a record of the vibration.
Set the thrust of Band B. Refer to Figure.
Operate the engine for three minutes with the thrust lever set in one position.
Make a record of the vibration.
Set the thrust of Band C. Refer to Figure.
Operate the engine for three minutes with the thrust lever set in one position.
Make a record of the vibration.
Set the thrust of Band D. Refer to Figure.
Operate the engine for three minutes with the thrust lever set in one position.
Make a record of the vibration.
Slowly decrease the engine speed to MIN IDLE.
The average vibration, for which you made a record during the 30 seconds, must not be more than the limits given in TASK 71-00-00-700-051-B00 (TESTING-000, CONFIG-002).
Go back to MIN IDLE.
Do a shutdown by the Discontinued Start and Shutdown Procedures. Refer to TASK 71-00-00-700-054-B00 (TESTING-000, CONFIG-002).
Do the necessary steps by the instruction in De-Rig the Engine after Testing. Refer to TASK 71-00-00-700-021 (TESTING-021).
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
NONEProcedure
Figure: Thrust setting curve
Thrust setting curve
