Landing Mass (LM) is the mass of the aircraft on landing, i.e. the Take-off mass less the Trip fuel and it can be calculated with various methods depending on the data given.

Zero Fuel Mass (ZFM) is the total mass of the aircraft less the usable fuel.

The fuel mass at destination will be:

• Remaining usable fuel - Remaining trip fuel to destination = 2500 lb - 1200 lb = 1300 lb, including both Alternate and Final Reserve fuel.

Thus, the revised estimated landing mass at destination will be:

• Fuel mass at destination + DOM + Traffic load = 1300 lb + 9950 lb + 3450 lb = 14 700 lb

Alternatively:

The Zero Fuel Mass is:

• DOM + Traffic load = 9950 lb + 3450 lb = 13 400 lb

The Fuel mass at destination will be:

• Remaining usable fuel - Remaining trip fuel to destination = 2500 lb - 1200 lb = 1300 lb, including both Alternate and Final Reserve fuel.

Thus, the revised estimated landing mass at destination will be: ZFM + Fuel mass at destination = 13 400 lb + 1300 lb = 14 700 lb.

Please take note and exercise caution to prevent any instances of double mass calculations. This is important because certain masses are already encompassed within other mass calculations.