Ace the Skies: 2026 Flight Surgeon Module D Test – Soar to Success!

The concept here is the safe window after drinking before flying duties, to let alcohol clear and impairment fade. Alcohol impairs judgment, coordination, and reaction time, so a downtime interval is used as a guardrail.

Twelve hours is chosen because, for typical amounts of alcohol, this provides a reasonable safety margin for metabolism so that impairment is unlikely to remain. Shorter intervals, like six hours, risk residual impairment for some individuals. Longer intervals, such as twenty-four or forty-eight hours, are more than needed in most cases and would unnecessarily delay duty without adding much practical safety benefit.

In short, twelve hours after the last drink is the standard downtime to help ensure you're fit for flight duties. If there’s any doubt about impairment, the safest choice is not to fly.