Engine Flashcards
Starting Limitation
ITT - Figure 1-7 in POH
OIL pressure - 25 min
OIL temp - negative 40 to 121 see POH
IDLE Limitation
Time limit - continuous ITT - 620 MAX N2% RPM - 56.2 +/- 1.3 OIL PRESS - 35 MIN OIL TEMP - NEGATIVE 40 to 121 (see POH)
Takeoff Limitation
Time limit - see POH ITT - 820 MAX N2% RPM 99.3 N1% RPM 104.4 OIL PRESS - 45 to 90 OIL TEMP - 10 to 121
Max Continuous limitation
Time Limit - see POH ITT - 796 MAX N2% RPM 99.3 N1% RPM 104.4 OIL PRESS - 45 to 90 (see POH) OIL TEMP - 10 to 121
Transient Limitation
ITT - Figure 1-6 in POH
N2%RPM - Figure 1-8 in POH
N1%RPM - Figure 1-9 in POH
OIL PRESS - 25 MIN / 100 MAX (see POH)
Max continuous thrust
1900 LBS per engine
N2 Accessory Driven Components
Fuel Pump / Fuel Control Unit (FCU) Oil Pump Starter-Generator Hydraulic Pump N2 Tachometer-Generator
How much HP core airflow can be provided as bleed air for the aircraft systems?
6.5%
Bleed airflow valve (starting)
Open on start
Closes at 89% N2
When does bleed airflow valve reopen?
Engine decelerates through 89% N2
Oil capacity
2.5 quarts
When do we check oil level?
30 minutes after shutdown
Ignition “normal” mode
Engine start
Engine anti ice
Other routine operations
Ignition “ON” Mode
Takeoff and landings Emergency Air Restart Emergency Decent Stalls Severe Turbulence Heavy Precipitation
Engine Fire Push button
Shuts off combustibles
De-energizes starter-generator
Arms Fire Bottles
Pushing a second time will reopen both shut off valves but the generator field will have to be reset.
Discharge Sequence for engine fire push button
1: Closes Fuel SOV - FUEL LOW PRESS annunciator illuminates
2: Closes hydraulic SOV - HYD FLOW LOW annunciator illuminates
3: F/W SHUTOFF annunciator illuminates
4: De-energizes starter-generator field relay - GEN OFF annunciator illuminates
5: Arms both fire bottles - BOTTLE ARMED annunciator illuminates
Weight of engines
448 lbs
What is the difference between a full oil tank, and one that needs oil added?
One quart
Fuel heat exchanger
Cools oil but does not heat fuel
How can we tell if the oil filter has been bypassed?
Pop out indication
When does the OIL PRESS WARN annunciator come on?
Oil psi dropping below 25
Where is the fuel filter located
Between the pump and the FCU
What kind of gas is in the detection loops
Helium
When do the fusible check valves on the fire bottles melt?
2400 psi / 210 degrees F
How long after discharging one fire bottle, should the second should be fired?
30 seconds
Fuel capacity
3200 pounds
242.2 gallons each side
What do the NACA vents do?
Provide positive pressure for the fuel tanks
When is the fuel boost pump used?
Starting an engine
Transferring fuel
Low pressure
FUEL LOW LEVEL annunciator
185 +/- 15 gallons left in tank
Turn on boost pumps
