What is the consequence of having 0.04% or more alcohol in the blood while acting as a crewmember?

When a crewmember has a blood alcohol concentration (BAC) of 0.04% or greater, it is a violation of Federal Aviation Administration (FAA) regulations, which establish strict rules regarding alcohol use for aviation professionals. A BAC at or above this threshold indicates impairment that can significantly affect a person's ability to perform necessary duties safely, which is why the regulation is in place.

The consequence of being found with a BAC of 0.04% or more while acting as a crewmember includes ineligibility to fly. This strict standard is intended to ensure the safety of passengers, crew, and the aircraft itself, as any level of impairment can dramatically increase the risk of accidents. Therefore, once a crewmember is found to be in violation of this limit, they are immediately deemed ineligible to operate an aircraft, regardless of any other factors.

This places a heavy emphasis on the accountability of crewmembers to abide by the regulations governing alcohol consumption and ensure public safety in aviation.