11.10 Dumping, venting & Draining Flashcards
what are the two types of weight limits on an aircraft?
The maximum take-off weight
The maximum structural landing weight
what one between the maximum take off weight and the maximum landing weight is lower?
the maximum landing weight
what is the dumping/jettison system for?
allows the flight crew to dump fuel overboard to prevent exceeding the aircraft’s maximum landing weight if there is an emergency
what can some aircraft also use the dumping/jettison system used for?
Some aircraft, however, for extra safety, have jettison systems to prevent high stress on the fuselage during overweight landings
why cant you empty every single tank on an aircraft with the jettison system
not all of the fuel tanks are attached to it
what are fuel vent systems used for?
to prevent the build up of pressure in the fuel tanks and to allow proper flow of fuel from the tank regardless of the attitude or the quantity of fuel on board
what are surge tanks?
surge tanks, which are normally empty, are designed to contain fuel overflow and prevent fuel spillage, particularly when fuelling the aircraft
What is a vent float valve?
a vent float valve consists of a valve body with a pad valve, a float, and a connection to a vent line
what is a flapper valve?
flapper valves prevent fuel from travelling outboard during aircraft manoeuvres but allow fuel to drain inboard during normal operation
what is the purpose of a drain system?
to drain water from the fuel tanks
why are drain valves operated manually?
for safety reasons
how do manually operate drain valves?
when the drain tool is inserted into the drain valve, applying pressure against the spring forces the piston onto the check valve. With a further push, it lifts the check valve and thereby opens it. The liquid can then be drained
