Minimum fuel note: the No. 1 and No. 2 fuel cells each contain ______ of unusable fuel

Minimum fuel note: the No. 1 and No. 2 fuel cells each contain ______ of unusable fuel

• A. 0 lbs
• B. 9 lbs
• C. 22 lbs
• D. 50 lbs

Answer: (B)

Unusable fuel is the portion that cannot be drawn from the tank because the fuel pickup and pump arrangement can’t reach it. A minimum amount is kept in each fuel cell to ensure the system stays primed and the pumps always have fuel at their intake under all attitudes and flight conditions. For this airplane, each of the No. 1 and No. 2 fuel cells contains nine pounds of unusable fuel. So the correct fill-in is nine pounds per cell (together that’s eighteen pounds, but the figure is per cell).

Unusable fuel is the portion that cannot be drawn from the tank because the fuel pickup and pump arrangement can’t reach it. A minimum amount is kept in each fuel cell to ensure the system stays primed and the pumps always have fuel at their intake under all attitudes and flight conditions. For this airplane, each of the No. 1 and No. 2 fuel cells contains nine pounds of unusable fuel. So the correct fill-in is nine pounds per cell (together that’s eighteen pounds, but the figure is per cell).