Aircraft Fuel Systems Flashcards
What is the purpose of a fuel jettison dump system?
To reduce the weight of the aircraft to a specified landed weight
What is the purpose of fuel tank internal baffles?
To resist fuel surging caused by changes in the attitude of the aircraft
Why should you wait a period of time after fueling before checking fuel sumps?
To allow time for water and sediment to settle to the drain point
What are two types of fuel tank cells?
Bladder type and integral fuel tank
What is a wet wing type construction?
Integral fuel tanks
What supports the weight of fuel in a bladder type fuel cell?
The structure of the cavity that the cell fits into
What indications could be used to determine where there may be danger of ice crystals, forming in the fuel of a turbine powered aircraft to
Fuel temperature or differential pressure type indicators
What are four types of fuel quantity gauges in use today?
Sight glass, mechanical, electrical and electronic
What is an electrical operated fuel tank shut off valve transit light?
A light that indicates when the valve is in motion
What should be done with old gaskets and seals when replacing fuel system components?
Removed and replaced by new ones
What method may be used to check a fuel tank for leaks after weld has been performed?
The tank is pressurized up to three psi and a soapy solution is added to detect any leaks
When would a fuel jettison system be required for small aircraft?
It is required when the maximum takeoff weight exceeds the maximum landing weight
What are some other names for a single point fueling system?
An under wing or pressure fueling system
Why do multi engine airplanes have fuel crossfeed systems?
To allow any engine to be fed by any tank
The fuel selector valve for a multi engine aircraft must have least three positions. What are they?
On, off, crossfeed
Why are electronic capacitance type fuel quantity indicating systems more accurate than other types?
They measure the mass of the fuel instead of the volume
For what reason is a fuel jettison system usually divided into two separate, independent systems, one for each wing
To help maintain lateral stability by jettison fuel from a heavy wing football, if necessary
What are drip gauges and sight gauges?
Underwing bayonet type fuel gauges
Is it possible for a fuel system to develop a leak that has no visible evidence such as a stain or spot and if so, how?
And internal component, such as a valve to develop a leak
Name some advantages of a single point fueling system
It reduces fueling time, reduce the chances for contamination and fire and illuminates damage to the aircraft skin
