Fuel Flashcards
Main tank composure
Crash worthy suction type self sealing, lower 1/3 self sealing
Prime/Boost pump function
Primes all fuel lines and boost pump for apu
All lines have
Self sealing breakaway valves
Fuel path
Drawn by dngine-driven fuel boost pump through fuel filter to HMU high pressure pump
Fuel Filter
Has PDI - pressure differential indicator
Doesn’t filter water, which may cause fluctuations/ surges
Placing fuel pump to fuel prime
opens both engine prime shutoff valves allows individual priming of the engines with the PCL in lockout
Main fuel tank (Location, usable fuel, interconnect)
Behind the cabin in the transition section.
590 usable gallons (4012 lbs JP-5)
Interconnect approx. 270-600 pounds per side
Left Cell components
Spots for single-point refuel/defuel, gravity refuel, HIFR 2 High level shutoff floats Check valve Sump Drain Vent
Right Cell components
2 check valves Sump Drain Vent APU Fuel line Fuel Dump system
External Tank Size
120 or 113 gallons
External Tank Components
Crashworthy, ballistically hardened
self sealing breakaways
Can be gravity fueled, pressure fueled, HIFR, defueled
External fuel level measurements
Single Guage probe
Low level thermistor exposed when tank empty
Overflow thermistor in vent line (EXT FUEL OVERFLOW)
Aux tank guage and low level switch signal absent
FMCP automatically bypasses that station and goes to the next
Do not initiate unmonitored manual transfer until main is below?
3200 lbs
Emergency jettison via ALL STORE JETT is inhibited when less than?
40 gallons, 272 lbs, in 50 lb increments, SEL JETT must be used
