Fuel Flashcards
Fuel is availabe to the engines from _______
all three tanks
How does the APU draw fuel from a tank
APU w/AC power: left side of fuel manifold
APU w/out AC power: No 1 tank suction feed
Center tank pressures are slightly higher output and therefore consumed
first
Check valves in the fuel system ensure?
correct fuel flow between tank and engine
prevent inadvertent transfer of fuel between tanks
What do Dim blue, Dark Blue and extingushed mean for the ENG VALVE CLOSED and SPAR VALVE CLOSED ?
Dim blue: valve is closed
Extinguished: valve is open
Bright blue: valve is in transit or in disagreement with commanded position.
The crossfeed valve is _____operated.
DC operated
Fuel temperature in main tank # ____ is displayed in the overhead panel if AC power is available.
1
Fuel tank capacities:
1: 8630
2: 8630
Center: 28,803
Total: 46,063
There are 2 ______ fuel pumps in each of the three tanks.
AC powered.
Fuel is normally pressure fed , but each engine can draw fuel from its corresponding main tank through a _______ line should both pumps fail.
suction fed. Suction feed is not possible from the center tank.
Engine fuel shutoff valves are ________controled valves
fuel actuated, solenoid controled
With more than ______ pounds of fuel in the center tank, the L and CTR FUEL PUMPS switches must be turned on.
1000.
In climb or cruise, when a CTR tank LOW PRESSURE light illuminates, select the pump_____.
Off.
If an engine is operating on suction feed, dissolved air from the fuel is released as the airplane ______ and may collect and thrust deterioration and ______ may result.
climbs; flameout.
When will you get a CONFIG fuel alert?
Center tank fuel greater than 1600 lbs, both CTR FUEL PUMPS switches are OFF and either engine is running.
Some a/c will also display the message with both CTR FUEL PUMPS switches on, along with low output pressure.
If only one center tank FUEL PUMP PRESSURE light comes on in flight, the _______ selector should be opened to prevent a fuel imbalance.
CROSS FEED
Always maintain fuel temperature at least ____above the fuel freezing point of the fuel being used.
3C. You may need to speed up, change altitude or deviate to warmer air masses.
When does a fuel LOW indicator appear on the fuel gauge for main tanks?
less than 2000 lbs.
In some aircraft, NEA is delivered to the _______ to reduce flammability.
center fuel tank
Where is the NEA indicator panel?
right main wheel well.Operation is automatic and transparent to the crew.
If NEA indicator shows inoperative, MEL will probably do what?
Allow the flight for dispatch.
