Plain English Meaning

A simple five-point check pilots run through at key moments in a flight to make sure nothing important has been overlooked. You ask yourself how each of the five things — the plan, the aircraft, you, your passengers, and your avionics setup — is doing right now, and adjust if any of them has changed.

Full Definition

A practical risk management checklist used by pilots to evaluate five key areas at critical points during a flight: the Plan (route, weather, fuel, regulations), the Plane (aircraft condition, , ), (fitness to fly, , ), (their condition, expectations, and influence on decisions), and (the avionics and set up for the flight). The check is typically applied at , , , , and before .