An aircraft is to depart from an airfield where the Performance Limited Take-off Mass is 89 200 kg. Certificated maximum masses are as follows:
| Maximum Ramp (Taxi) Mass: | 89 930 | kg |
| Maximum Take-off Mass: | 89 430 | kg |
| Maximum Landing Mass: | 71 520 | kg |
| Maximum Zero Fuel Mass: | 62 050 | kg |
Fuel on board at the parking ramp: | ||
| Taxi fuel: | 600 | kg |
| Trip Fuel: | 17 830 | kg |
| Contingency, final reserve and alternate: | 9030 | kg |
If the Dry Operating Mass is 40 970 kg the maximum Traffic Load (TL) that can be carried on this flight is…
First we get the Take-off Mass, smallest of:
1.MSTOM: 89 430 kg
2.Performance limited TOM: 89 200 kg
3.MLM + Trip Fuel (as Trip Fuel will be consumed during the flight): 71 520 + 17 830 = 89 350 kg
4.MZFM + takeoff fuel = 62 050 + 17 830 + 9030 = 88 910 kg (smallest number)
Now we know our actual takeoff mass (88 910 kg), we deduct from it [DOM and takeoff fuel] to know the traffic load:
DOM: 40 970
Takeoff fuel: 26 860 kg
Traffic load = 88 910 — [40 970 + 26 860] = 21 080 kg
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