How many hours can a flight crew log in a 24-hour period for single engine IFR operations?

For single-engine IFR (Instrument Flight Rules) operations, a flight crew is permitted to log a maximum of 14 hours in a 24-hour period. This regulation is in place to ensure that pilots have adequate rest and do not exceed safe operational limits, which is crucial for maintaining alertness and overall safety during flight operations.

The 14-hour limit applies specifically to the overall duty time a crew can engage in flight-related activities and is relevant for commercial operations where IFR conditions might complicate navigation and require greater levels of concentration. This allowance allows for longer flying or working hours, especially for more complex flight missions and can include time spent in pre-flight activities, rest periods, and cumulative flight hours.

The other specified hour limits in the choices do not apply in this context, as they either underrepresent the maximum flight time permissible under regulations or relate to different operational parameters not specific to single-engine IFR operations. Understanding these regulations is crucial for compliance and ensuring flight safety.