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R (a) If the adjusted values for EGT and N2 are less than the maximum
R limits (if EGT and N2 margin are positive numbers), the engine
R will make target N1 and not be more than the EGT or N2 limits. No
R more power assurance testing is necessary if this occurs.
R (b) If the data is not in line with limits, let the engine become
R stable at idle for 4 minutes and do the power assurance again at
R the same power level.
R (c) If the data is still not in line with the limits after a second
R engine run, investigate the reported fault messages in the
R Trouble Shooting Manual.
R CAUTION : IF THE DATA COLLECTED IS NOT IN LINE WITH THE PERMITTED_______
R LIMITS, THE ENGINE MAY GO OVER THE EGT OR N2 LIMIT AT
R TAKEOFF POWER.
R (d) If the cause is found and corrected, do the power assurance check
R again.
R (e) If the engine exceeds EGT or N2 limits in normal operation after
R two test runs and after troubleshooting per the TSM has been
R completed, engine replacement should be considered. The power
R assurance check should not be used by itself as a primary reason
R for engine replacement.
R (10) Stop the engines (Ref. TASK 71-00-00-710-028).
R (11) Do a visual inspection of the engine, the engine inlet and exhaust
R areas.
R
5. Close-up________
Subtask 71-00-00-869-106
A. On the AIR COND panel 30VU:
- Release the ENG 1(2) BLEED pushbutton switch (the OFF legend goes off).
Subtask 71-00-00-862-063
B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-
002).
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Vibration Check
1. Reason for the Job
__________________
The vibration monitoring system can be used to get vibration data. This task should be performed when a new non pre-tested engine is installed or after FOD/ICING and subsequent fan blades change.
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure 71-00-00-710-003 Engine Automatic Start 71-00-00-710-028 Engine Shutdown 77-32-34-860-041 Change the configuration of the Accelerometer TSM 77 PB 101 (for corrective action)
3. Job Set-up
__________
Subtask 71-00-00-869-204
A. Safety Precautions
CAUTION : DO NOT DO ENGINE GROUND RUNS UNLESS THE AIRCRAFT IS ON A
_______ CONCRETE PAVEMENT. ENGINE EXHAUST GASES CAN CAUSE AN ASPHALT PAVEMENT TO MELT. MELTED ASPHALT CAN CAUSE IMPORTANT DAMAGE TO THE REAR STRUCTURE OF THE AIRCRAFT AND/OR TO THE ENGINE NACELLES.
(1) Make sure that the aircraft is parked on a clean dry flat area. There must be no oil, grease or other slippery material on that surface. Pavement must be in concrete because asphalt can cause damage to the engine/aircraft sturcture.
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(2) Make sure that a total of 3000 Kg (minimum) of fuel are in the inner tanks.
Subtask 71-00-00-861-064
B. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002). Subtask 71-00-00-865-100
C. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34
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