How long must personnel wait after drinking before flying?

How long must personnel wait after drinking before flying?

• A. 24 hours
• B. 48 hours
• C. 12 hours
• D. 72 hours

Answer: (C)

Alcohol impairs judgment, reaction time, and coordination—skills essential for safe flight. After drinking, the body metabolizes alcohol at varying rates, so impairment can linger even if you don’t feel drunk. A conservative rule used in aeromedical practice is to wait about 12 hours after the last drink before flying. This duration provides a safety margin for most individuals, reducing the chance that residual effects will impair performance. Longer waits (24, 48, or 72 hours) are unnecessarily restrictive for typical operations, while shorter waits may not fully account for variability in metabolism and lingering impairment. Always ensure you feel unimpaired and, if applicable, that your BAC is within allowed limits before flight.

Alcohol impairs judgment, reaction time, and coordination—skills essential for safe flight. After drinking, the body metabolizes alcohol at varying rates, so impairment can linger even if you don’t feel drunk. A conservative rule used in aeromedical practice is to wait about 12 hours after the last drink before flying. This duration provides a safety margin for most individuals, reducing the chance that residual effects will impair performance. Longer waits (24, 48, or 72 hours) are unnecessarily restrictive for typical operations, while shorter waits may not fully account for variability in metabolism and lingering impairment. Always ensure you feel unimpaired and, if applicable, that your BAC is within allowed limits before flight.