What is the maximum allowable flight time for a single pilot under IFR in a 24-hour period?

The maximum allowable flight time for a single pilot operating under Instrument Flight Rules (IFR) in a 24-hour period is 8 hours. This regulation is set to ensure that pilots maintain an adequate level of alertness and performance during flight operations.

Flying for extended periods can lead to fatigue, which significantly impacts a pilot's cognitive functions and decision-making abilities. The regulation of 8 hours helps to mitigate the risks associated with fatigue by limiting the amount of time a pilot can spend flying in a single day.

In addition, this limit aligns with industry standards and best practices for maintaining safety in aviation operations. It provides a structured approach to flight scheduling and ensures that pilots have ample time for rest and recovery between flights.