14 CFR § 91.17 - Alcohol or drugs.
- (a) No person may act or attempt to act as a crewmember of a civil aircraft—
- (1) Within 8 hours after the consumption of any alcoholic beverage;
- (2) While under the influence of alcohol;
- (3) While using any drug that affects the person's faculties in any way contrary to safety; or.
MORE DETAILS