Alcohol and Drugs

91.17 states:

• No person may act or attempt to act as a crewmember of a civil aircraft:

  • Within 8 hours after the consumption of any alcoholic beverage
  • While under the influence of alcohol
  • While using any drug that affects the person's faculties in any way contrary to safety
  • While having an alcohol concentration of 0.04 or greater in a blood or breath specimen

• Except in an emergency, no pilot of a civil aircraft may allow a person who appears to be intoxicated or who demonstrates by manner or physical indications that the individual is under the influence of drugs (except a medical patient under proper care) to be carried in that aircraft.