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When does the Bleed Valve Close?
Closes at 61% +/- 4%
- Indicated by:
- 1) Increase in N2 IDLE RPM of approx 3%
2) Decrease in EGT of approx 50o
What does the engine accessory gearbox drive? (6)
- 1) Hyd Pumps
- 2) DC Generator
- 3) LP Fuel Pump
- 4) HP Fuel Pump
- 5) Engine Oil Pumps
- 6) N2 RPM Tach-Generator
LP PMP Caution Light
Fuel px drops below 35psi
Fuel Control Unit
FCU schedules fuel flow according to selected throttle position and compensates for changes in altitude and airspeed
Shot of Fuel Solenoid
Provides increased fuel flow to reduce acceleration time and improve engine surge control.
- 1) Open on ground
- 2) Remains open through 9,500 +/- 300 ft MSL
- 3) Reopens when descending through 7,700 +/- 500 ft MSL
What is SIFCU?
What does it do?
Sub Idle Fuel Control Unit
Meters a fuel supply to the 18 fuel spray nozzles during the starting cycle
Engine Control Amplifier automatically prevents overspeed and overtemp conditions under normal operations
When N1 reaches 1000 RPM in correct direction of rotation, signal sent which energizes ignition system and illuminates READY advisory.
Deenergized and READY extinguished when engine reaches 45% RPM.
Max Consumption Rate
25.2 U.S. Pints
Unusable or trapped: 9.6 Pints
Max Consumtion Rate: 0.8 Pints / Hour
Components that make up Control and Protection of electrical system (4)
- 1) Volt Regulator
- 2) Over voltage unit
- 3) Under voltage unit
- 4) 300 Amp Fuse
Instrument approaches available for:
1) Single Inverter Failure
2) Dual Inverter Failure
1) Single: Limited to TACAN and Radar Approaches
2) Dual: Limited to Radar Approaches
1) Fuel Capacity
2) Amount used for Jet Log
1) 443 Gallons
2) 2861 Pounds
Fuel Px normally pressurized to what?
2 Ways to change
Normally pressurized to 6 psi
- 1) Drop tailhook (down to 4psi)
- 2) Refuel
Max time of inverted flight?
What would you like to do?
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