Chapter 2 - Aircraft Mass Definitions Flashcards
What is Basic Empty Mass (BEM)?
The mass of:
The aircraft
Declared unusable fuel
Declared unusable oil
All other operating fluids
Fire extinguishers
Pyrotechnics
Emergency on equipment
Supplementary electrical equipment
Where is BEM recorded?
In the weighing schedule of the tech log.
What is maximum structural take off mass (MSTOM)?
The structural mass limit of an aircraft. Adding extra mass will cause damage to the aircraft.
What is maximum structural landing mass?
The maximum permissable mass of an aircraft when landing. Adding more mass will cause damage to the aircraft.
What is zero fuel mass?
The total mass of the aircraft with no usable fuel on board.
What is maximum zero fuel mass?
The structural mass limitation associated with the loading of the fuselage and the stress at the wing roots.
What is meant by a performance mass limitation?
Characteristics of arrival or departure airfields, such as runway length, limiting maximum mass of the aircraft. (shorter runway means mass must be less otherwise risk overunning on TO or landing run)
What is regulated take off mass?
The lowest mass out of structural or performance take off mass limitations.
What is regulated landing mass?
The lowest mass out of structural and performance landing masses.
What is variable load?
The mass of items that the aircraft requires to do its job:
Crew & crew baggage
Food/drink
Pottable water
Lavatory chemicals
Removable passenger service equipment
What is dry operating mass?
The of the aircraft before usable fuel and traffic load:
DOM = BEM = VL
What is traffic load?
Payload (passengers/revenue items)
Ballast
Non-revenue load
What is the useful load?
TL + TOF
What is block fuel?
Total fuel required on aircraft before start up.
What is take off fuel?
The fuel on an aircraft just before take off.
Block fuel - taxi fuel
What is the synonym for remembering the different loads?
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