Aircraft Fuel Systems Flashcards
What is the purpose of a fuel dump system?
It is an emergency system provided so that the flight crew can quickly bring the weight of the airplane down to the maximum landing weight if an emergency occurs during or shortly after takeoff.
Other than reducing weight, what other function can be accomplished with a fuel jettisoning system?
Fuel can be dumped from the heavy wing In order to maintain lateral stability. A fuel dump systems required for all transport airplanes if the maximum takeoff weight is more than 105% of the maximum landing weight. The airplane must be free of fire hazards during dumping, and fuel must dump free and clear of the airplane.
What are two types of; fuel cells?
Bladder-type fuel cells and integral fuel cells.
How is the weight of a bladder-type fuel cell supported?
The bladder-type cell depends on the structure of the cavity in which it sits to support the weight of the fuel within it. They are made of either rubber or nylon.
What is “wet wing” construction?
Wet wing construction is when the fuel cells are built into the wings of the aircraft structure. They are an integral part of the structure and are not removable.
What are the advantages of a single point pressure fueling system?
Pressure fueling, sometimes referred to as single-point or under-wing fueling, greatly reduces the time required to service large aircraft. It eliminates aircraft skin damage from hoses and hose nozzles, and reduces the chances of fuel contamination.
What is the purpose of a fuel temperature indicator on a turbine engine?
It is a means for checking the temperature of the fuel in the tanks and at the engine to determine when there may be danger of ice crystals forming in the fuel.
What is the purpose of warning lights in connection with fuel systems?
Warning lights may be used to indicate when the fuel pressure is too low, or to indicate when the fuel quantity in a tank is below a certain amount.
What are the four general types of fuel quantity gages?
The four types are sight glass, mechanical, electrical, and electronic.
Which type fuel quantity gage is considered to be more accurate than the other types?
The electronic-capacitance type, because it measures by weight instead of gallons.
What is a cross-feed system?
An interconnected fuel system designed so that fuel can be fed from various tanks to any engine.
What is the purpose of the baffles in a fuel tank?
To prevent the fuel from surging as a result of changes in the attitude of the aircraft
How can a fuel tank be checked for leaks after a repair?
By a pressure check using air pressure not over one-half psi and liquid soap or bubble solution to identify the leak.
