Fuel Flashcards
How does fuel reach the collector tanks in each wing?
Gravity flow through flapper valves and when the engines are running through a scavenge ejector
How many water drain valves are there in each wing?
Three (Six total)
Where are the water drain valves located?
- Collector tank
- Wing tank
- Surge tank
What is the purpose of the NACA scoop?
Provides static ventilation of the tanks. Relieves air pressure differential caused by refueling, thermal expansion, or variation of altitude during flight.
What is the purpose of the surge bay?
Provide additional expansion volume to prevent fuel spillage.
How much fuel does the surge bay hold?
8 gallons or 53.6 pounds of fuel
The engines are provided fuel from which tank?
Collector tank
Fuel for the APU is provided from which tank?
Right collector tank
What feeds the APU line fuel?
Right standby pump or the right ejector
Where are the ejectors located?
Bottom of the collector tanks
What provides the motive flow for the ejectors to operate?
High pressure output of the engine driven fuel pumps
Where are the scavenge pumps located?
Lowest inboard point of each wing tank
What is necessary for the scavenge pumps to operate?
Motive flow output of fuel from the engine driven high pressure fuel pumps
Where is the engine fuel shutoff valve?
Forward of the engine rotor burst area
Where is the fuel heater/oil cooler located?
Engine accessory gearbox
