FAA Sport Pilot Airplane (SPA)Human Factors and ADMMedium
Under 14 CFR 91.17, a pilot may not act as pilot in command of an aircraft within how many hours after consuming an alcoholic beverage, or with a blood alcohol concentration of what percentage or greater?
- A24 hours; 0.04 percent
- B8 hours; 0.04 percent
- C8 hours; 0.08 percent
- D12 hours; 0.08 percent
Show answer & explanationAnswer & explanation
Correct answer: B. 8 hours; 0.04 percent
14 CFR 91.17 prohibits acting as a crewmember within 8 hours after consuming alcohol or with a blood alcohol concentration of 0.04 percent or greater, and also prohibits flying while under the influence regardless of BAC.
Why the other options are wrong
- A. 24 hours is not the regulatory time limit.
- C. 8 hours is correct but 0.08 percent is not the FAA limit.
- D. 12 hours and 0.08 percent do not match the regulation (0.08 is the automobile DUI standard in most states).
Alcohol Regulation 91.17
FAA regulation prohibiting crewmembers from acting in that capacity within 8 hours of alcohol consumption or with a BAC of 0.04% or greater, or while under the influence.
- 8-hour 'bottle-to-throttle' rule
- 0.04 percent blood alcohol concentration limit
- Prohibits flying while under the influence regardless of BAC or time elapsed
Memory trick: Eight hours, four percent, zero tolerance if impaired.