What could be the consequence of not completing a required flight review?

The consequence of not completing a required flight review primarily relates to the ability to act as pilot-in-command. The Federal Aviation Administration (FAA) mandates that pilots undergo a flight review every 24 calendar months to ensure they maintain their proficiency and familiarity with the aircraft and relevant regulations. If a pilot does not complete this review, they are not legally permitted to act as pilot-in-command of an aircraft. This requirement reinforces the importance of regular training and skill maintenance to promote safety in aviation operations.

While issues like medical certification, fines, and mandatory ground school attendance can arise depending on various circumstances, they are not direct consequences of failing to complete a flight review. Therefore, the primary impact is the restriction on the pilot's ability to operate an aircraft, emphasizing the necessity of compliance with the flight review requirement to maintain pilot privileges.