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Fuel Contaminants
Water is one of the most common contaminants found in aircraft fuel.
Water can enter the fuel system:
- through poorly sealed fuel caps
- during refuelling
- through condensation inside the fuel tanks
Fuel tanks contain air as well as fuel, and this air may contain moisture.
When the temperature drops, the moisture can condense and form water inside the tank.
Because temperatures often fall overnight, condensation may occur during this period.
Keeping fuel tanks reasonably full can help reduce the amount of moist air in the tank and therefore reduce condensation.
Fuel Checks
Water is heavier than fuel, so it settles at the lowest points in the fuel system.
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