What is the maximum allowable Blood Alcohol Concentration (BAC) for pilots?

The maximum allowable Blood Alcohol Concentration (BAC) for pilots is set at 0.04. This limit is established by the Federal Aviation Administration (FAA) to ensure the safety of flight operations. If a pilot's BAC is at or above this level, it is considered illegal to act as a pilot in command of an aircraft.

This regulation reflects the FAA's stringent stance on the impairment that alcohol can cause, which can significantly affect a pilot's cognitive functions, motor skills, and overall ability to operate an aircraft safely. The 0.04 BAC limit is lower than many general driving standards, emphasizing the critical importance of maintaining maximum alertness and performance in aviation.

The higher BAC levels represented in the other options are simply not permissible for pilots, underscoring the unique safety considerations required in aviation. By maintaining the BAC limit at 0.04, the FAA aims to reduce risks associated with impaired judgment and performance, ultimately protecting both pilots and passengers.