What is the required interval for a biannual flight review?

The required interval for a biannual flight review is indeed every 24 calendar months. This requirement is outlined in the Federal Aviation Regulations under 14 CFR Part 61.56, which states that a pilot must complete a flight review at least once every two years to act as pilot-in-command of an aircraft. This review ensures that pilots maintain their skills and stay current with regulations and procedures, which is critical for safety in aviation.

The review typically includes a combination of ground and flight training, covering topics such as airspace rules, weather, navigation, and aircraft operation. Completing the flight review every 24 months helps to uphold the standards of pilot proficiency, allowing for a consistent assessment of flying skills and knowledge. Thus, a pilot who does not complete the review within this timeframe risks not being legal to act as pilot-in-command until the requirement is fulfilled.