Maximum allowable take-off mass 64 400 kg; maximum landing mass 56200 kg; maximum zero fuel mass 53 000 kg; dry operating mass 35 500 kg; estimated load 14 500 kg; estimated trip fuel 4 900 kg; minimum take-off fuel 7 400 kg. Find: maximum additional load

This is a mass and balance question … there are 3 mass limits you must consider – MTOM, MZFM, MLM – and each time you go flying, one of these will be ‘critical’ in terms of maximum traffic load.

So work out the maximum traffic load for each of these limits:

We know that at any time AIRCRAFT MASS = DOM + TL + FUEL …. We use this

At T/O … Max TL = MTOM – DOM – FUEL = 64 400 – 35 500 – 7 400 = 21 500 kg

ZFM … Max TL = MZFM – DOM = 53 000 – 35 500 = 17 500 kg

On landing … Max TL = MLM – DOM – FUEL = 56 200 – 35 500 – 2500 = 18 200 kg

SO, the actual LIMIT comes from the ZFM calculation …. 17 500 kg … 3000kg more than our estimated TL (14 500kg)