Plain English Meaning

The checks and information-gathering a pilot must do before flying, so they know what to expect and can confirm the flight can be done safely.

Full Definition

The pilot's required review and preparation before a flight, including becoming familiar with all available information concerning that flight. Under 14 CFR 91.103, this includes weather reports and forecasts, fuel requirements, alternatives if the planned flight cannot be completed, any known traffic delays, runway lengths at airports of intended use, and aircraft takeoff and landing performance data.

Context Anchor

In an , preflight action includes checking for that could create on the aircraft and planning how to avoid or leave those conditions.