Line checks

This regulation requires airline pilots in command to demonstrate their proficiency during actual flight operations at least once every 12 calendar months. Unlike simulator checks, a line check observes the pilot performing normal duties on a real revenue or training flight.

For domestic and flag carriers, a qualified check pilot must conduct the evaluation during a flight over a representative portion of the airline's route system. The check pilot must be currently qualified on both the specific aircraft type and the routes being flown.

For supplemental operations (typically charter carriers), the check pilot needs only be qualified on the aircraft type, and the flight must cover at least part of a federal or foreign airway or advisory route where the pilot might operate.

This ensures pilots maintain practical, real-world competency in their actual operating environment, not just in simulators. Without a current line check, a pilot cannot legally serve as pilot in command for that airline.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*