Terminology

Question 1

Basic Empty Mass (Empty Mass) =

Answer 1

mass of aeroplane including all equipment required for the role of the aeroplane (pax seats etc), engine oil and unuseable fuel

Question 2

Dry Operating Mass (DOM) =

Answer 2

mass of aeroplane ready for a specific type of operation, including crew and their baggage, catering, potable water. Excluding useable fuel and traffic load

(Basically everything needed to operate the aeroplane except pax and fuel)

Question 3

Max Zero Fuel Mass =

Answer 3

Maximum permissible mass of the aeroplane with no useable fuel

Question 4

Operating Mass (OM) =

Answer 4

DOM plus fuel but without traffic load

Question 5

Performance Limited Landing Mass =

Answer 5

landing mass subject to the destination aerdrome limitations

Question 6

Performance limited take-off mass =

Answer 6

take-off mass subject to departure aerodrome limitations

Question 7

Regulated landing mass =

Answer 7

lowest of performance limited and structual limited landing mass

Question 8

Zero fuel mass =

Answer 8

DOM plus traffic load but excluding fuel

Question 9

Traffic load =

Answer 9

total mass of pax, baggage and cargo, including any ‘non-revenue’ load

Question 10

Take-off mass =

Answer 10

ZFM plus fuel at start of take-off run