A person may not act as a crewmember of a civil aircraft if alcoholic beverages have been consumed by that person within the preceding
A
8 hours.✓ Correct Answer
B
12 hours.
C
24 hours.
Explanation
14 CFR 91.17(a)(1) prohibits acting as a crewmember within 8 hours after consuming any alcoholic beverage. 12 or 24 hours may be wise personal minimums, but the regulatory limit is 8 hours (plus the 0.04 and not-under-the-influence conditions).
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