(4)
Check functional operation of repaired or replaced component and associated parts. Ensure that no air, fuel, or oil leaks are present.
(5)
If check of anti-ice system is required, place anti-ice switch to ON position. Proper
operation of system will be indicated by an immediate drop of 0.02 to 0.04 EPR. (5a) If gravel protection system is being operated, a slight drop in EPR will occur.
(6)
Place anti-ice switch to OFF position. Check for recovery of part power EPR.
(7)
Retard thrust lever to IDLE and allow engine to cool for 5 minutes.
(8)
Shut down engine.
(9)
Inspect engine for evidence of fuel and/or oil leaks. Refer to par. 1.D. for leakage limits. Perform corrective action as required.
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G. Test C - Ground Check at 3000 lb/hr Fuel Flow
(1)
Start engine.
(2)
Advance thrust lever as required to attain 3000 lb/hr fuel flow. Maintain for minimum of 2 minutes.
(3)
Observe instrumentation and system components for proper operation.
(4)
Retard thrust lever to IDLE and allow engine to cool for 5 minutes.
(5)
Shut down engine.
(6)
Inspect engine for evidence of fuel and/or oil leaks. Refer to par. 1.D. for leakage limits. Perform corrective action as required.
H. Test D - Trim Check
(1) Perform engine trim procedure (Ref 71-09-200, Power Plant - Trim Procedure).
I. Test E - Ground Check for Bleed System Operation
(1)
Start engine.
(2)
Operate engine at idle rpm and check compressor bleed valve for proper operation (Ref 71-09-100, Compressor Antisurge Bleed Valves Schedule).
(3)
Shut down engine.
(4)
Inspect engine for evidence of fuel and/or oil leaks. Refer to par. 1.D. for leakage limits. Perform corrective action as required.
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J. Test F - Ground Check for Pretrimmed Engine
(1)
Determine idle N2, part power trim EPR, and takeoff EPR for existing ambient temperature and true local barometric pressure using applicable trim table section (Ref 71-09-200, Trim Procedure).
(2)
Start engine.
(3)
Allow engine to run at idle as required for oil temperature to reach 100°F (38°C).
(a) During warmup at idle, check engine tubing, connections, and components for evidence of fuel and/or oil leaks. Perform corrective action as required.
(4)
Advance thrust lever to part power trim target determined in step (1) and maintain for minimum of 15 seconds. Check that engine operating parameters are normal.
(5)
Advance thrust lever to no bleed takeoff EPR target setting determined in step (1).
CAUTION: THERE IS NO THRUST LEVER STOP AT TAKEOFF POWER RATING. DURING ENGINE OPERATION AT TAKEOFF RATING, EXHAUST GAS TEMPERATURE, N1 AND N2 RPM MUST BE CLOSELY MONITORED TO ENSURE THAT OPERATING LIMITATIONS ARE NOT EXCEEDED. MONITOR "GEN DRIVE OIL IN TEMP" INDICATOR. OIL TEMP SHOULD NOT EXCEED 125°C.
(6)
When engine has stabilized at takeoff power (minimum of 30 seconds at takeoff), record complete set of engine instrument readings.
(7)
Retard thrust lever to idle position and check for proper idle N2 as determined in step (1).
(8)
Check reverse thrust detent (Ref 78-32-01, Adjustment/Test).
(9)
Allow engine to cool at idle for 5 minutes. Shut down engine.
(10)
Check engine for evidence of fuel and/or oil leaks. Refer to par. 1.D. for leakage limits. Perform corrective action as required.
K. Test G - Acceleration Check
NOTE: After completion of a satisfactory trim run, the engine shall be checked at takeoff setting to ensure that takeoff thrust is available and to check for adequate cushion between takeoff and full throttle thrust lever position. Normally takeoff thrust is obtained at part throttle; however, the amount of throttle required will change with ambient temperature.
(1)
Operate engine at idle rpm for 3 minutes.
(2)
Advance thrust lever to takeoff EPR target setting.
CAUTION: THERE IS NO THRUST LEVER STOP AT TAKEOFF RATING. DURING ENGINE OPERATION AT TAKEOFF RATING, EXHAUST GAS TEMPERATURE, N1 AND N2 RPM MUST BE CLOSELY MONITORED TO ENSURE THAT OPERATING LIMITATIONS ARE NOT EXCEEDED.
NOTE: If takeoff EPR is not attainable, recheck the target and check for satisfactory throttle rigging. If all of the engine parameters appear high when compared with another engine, recheck the target and check the Pt7 system for leaks. If all appears normal, perform engine trim procedure.
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