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An aircraft flies from airport A to airport B, covering a total distance of 460 NM. After 1 h 11 min, it has covered a distance of 183 NM, and its remaining fuel is equal to 780 lb plus reserves. Determine the remaining fuel at airport B, assuming conditions remain the same and given:

TAS: 185 kt
Headwind: 30 kt
Trip fuel: 1 098 lb
Fuel flow: 370 lb/h

  • A
    299 lb + reserves
  • B
    235 lb + reserves
  • C
    119 lb + reserves
  • D
    385 lb + reserves
Note: Question asks us to assume that conditions remain the same, meaning that we should calculate the actual fuel consumption and groound speed during the first 183 NM (disregarding the Fuel Flow/GS provided by the question).

1) Determine Fuel consumed and fuel consumption during the first 183 NM:

  • Fuel Consumed = 1 098 lb - 780 lb = 318 lb
  • Fuel Consumption = (318 lb / 71 min) x 60 min/h
    Fuel Consumption = 269 lb/h

2) Calculate actual Ground Speed during the first 183 NM:
Ground Speed = (183 NM / 71 min) x 60 min/h = 155 kt

3) Calculate remaining distance and flight time:

  • Remaining distance = 460 NM - 183 NM = 277 NM
  • Remaining Flight time = 277 NM / 155 kt = 1.79 h

4) Calculate fuel consumed during the remaining distance:
Fuel Consumed = 1.79 h x 269 lb/h = 481.5 lb

5) Remaining fuel at airport B:
780 lb - 481.5 lb = 298.5 lb = 299 lb + reserves

Your Notes (not visible to others)



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