Systems 2 - Fuel system Flashcards
What are the three ways the aircraft can be refueled?
Gravity, Pressure, and Closed Circuit.
The APU draws it’s fuel from where?
No. 1 main fuel cell
On the fuel system selector, what does the XFD position do?
Allows engine to draw fuel from the opposite tank.
Fuel from both main fuel tanks are drawn to the engines by _____ from the No.1 and No.2 _____-driven fuel pumps
Suction
Engine
The engine driven Boost pumps are driven by the _____ section and gives negative pressure
NG
Fuel selectors 3 scelectable positions:
OFF - Allows no fuel to the engine
DIR - Engine draws from its on side fuel tank
XFD - Engine draws fuel from the opposite fuel tank
When fuel samples are required, Check:
- For contamination before the first flight of the day.
- For contamination after adequate settling time after cold refueling.
- If the fuel source is suspected to be contaminated.
Both main fuel tanks are located in the _____ section of the aircraft.
Transition
The FUEL 1 LOW and FUEL 2 LOW cautions appears when?
Approximately 172 lbs of fuel remain in the tank
The No.1 and No. 2 submerged Boost Pumps located inside the fuel cells receive power from where?
No.1 and No. 2 AC Primary Busses respectively.
APU burn at sea level
120 Lb/h
What are the two ways the fuel tanks are self sealing?
Chemical - Contact with fuel creates a goop which seals the hole
Mechanical - Rubber natualy wants to return to its previous state before the hole was created
What is the engine fuel system components, in order of fuel flow?
- Engine Driven Boost Pump
- Fuel pressure sensor
- Fuel filter
- HMU
- Liquid-to-liquid cooler
- Overspeed and Drain Valve (ODV)
- Main fuel manifold with twelve fuel injectors
What are the three main inputs to the HMU that affect fuel flow to the combustor?
LDS from the collective, PAS from the PCL, and torque motor from the DEC.
What alerts the pilot if the No. 1 or No. 2 fuel filter is being bypassed?
FUEL 1 or FUEL 2 BYPASS caution.
