ENGINES Flashcards
Maximum Engine EGT During Start
On ground: 750 degrees Celsius
In flight: 975 degrees Celsius (TOGA max time for 5’ AEO, 10’ OEI)
Maximum Engine EGT During MCT
940 degrees Celsius (no time limit)
Maximum Engine EGT During TOGA And Time Allowances
AEO: 975 degrees Celsius (5 minutes)
OEI: 975 degrees Celsius (10 minutes)
Includes TOGA, FLEX, and DERATE thrust modes.
Shaft Speeds: Maximum N1
- 5%
* The N1 limit depends on the ambient conditions and on the configuration of the engine air bleed. These parameters may limit N1 to a value that is less than the above-mentioned N1 value
Shaft Speeds: Maximum N2
113%
Maximum Continuous Oil (MCT) Temperature
160 degrees Celsius
Maximum Oil Transient Temperature And How Long?
175 degrees Celsius for 15 minutes
Minimum Starting Oil Temperature
-40 degrees Celsius
Minimum Oil Pressure
10 psi
Minimum Oil Quantity
Check that the oil quantity is at or above 12 qt + estimated consumption (average estimated consumption = 0.56 qt/h). Engine operation with engine oil consumption above 0.56 and up to 0.87 qt/h, is allowed, provided that the engine oil consumption enables fulfillment of the mission.
GE CF6-80E1 Engine Starter Limitations
5’-30’‘-5’-10’
- Starter maximum continuous operation is 5 min.
- Between each cycle, wait 30 s per minute of operation for starter cooling.
- After two consecutive 5 min duty cycles, wait 10 min to allow starter to cool before each subsequent 5 min duty cycle.
- No running engagement of the starter when the N2 is above 30%.
Reverse Thrust
- Selection of the reverse thrust is prohibited in flight.
- Backing the aircraft with reverse thrust is not permitted.
- Maximum reverse should not be used below 70 kt. Idle reverse is permitted down to aircraft stop.
