fuel system Flashcards
What are the components of the fuel system
power source fuel storage subsystem fuel distribution subsystem refueling subsystem fuel management subsystem fuel system controls and indicators
What altitude and temperatures are the fuel system designed for
sea level - 41,000’
-40 and 50C
How does the fuel flow between the tanks
aft cabin aft fuselage right mid-tank wingtips fuel feed chamber
What pressure differential is required for the fuel filter bypass valve to open
2.3 psi
During normal operations how is fuel supplied to the engines
by the primary jet pump from the engine fuel feed tank
What is the volume of the fuel in the wing tanks under px refueling and gravity refueling.
PX refueling –204.5 gallons / 2740 lbs
gravity refueling–211.5 gallons / 2834 lbs
What is the capacity of the fuel feed chamber
approximately 20 gallons
What are the three types of fuel pumps on the T-1
Electric
Jet
Engine-driven
How many electric pumps are there, where are they?
4 electric pumps
1 per fuel chamber
1 per mid tank
What are the four purposes of the boost pumps
Engine start
Backup for primary jet pumps
Source of pressure for operation of transfer jet pumps
Crossfeed
When do the boost pumps automatically come on
Fuel feed line pressure drops below 5 psi
Fuel feed chamber volume below approximately 11 gallons
Engine start
Crossfeed selected
When do the transfer pumps come on, what must be operating for the transfer pumps to come on?
As long as fuel is available in the mid tanks
The generators must be operational
What are check valves used for in the fuel system
prevent reverse flow of fuel
What are the three types of drain valves used in the fuel system
Sump
Defuel
Filler port overboard
At what pressure differential do the transfer fuel pumps turn off
when fuel level reaches slightly above empty
and
line pressure drops to 5.0 +- 0.5 psi
