Plain English Meaning

A simple five-item mental review a pilot runs at set points during a flight to catch anything that has changed. The five items are the flight plan, the aircraft, the pilot's own condition, the passengers, and the cockpit equipment and avionics.

Full Definition

A structured personal risk-management tool used in single-pilot operations in which the pilot reviews five distinct areas — the Plan, the Plane, the Pilot, the Passengers, and the Programming — at key points during a flight to identify changes that may require a decision. The check is applied at defined trigger points: preflight, , at the hourly or mid-leg check, before , and just prior to the or, for , entering the .