Plain English Meaning

It is the part of the checklist you work through once you are sitting in the airplane, before you actually start the engine. It makes sure the cockpit is set up correctly and the airplane is safe to start.

Full Definition

A named section of an airplane checklist covering all items the pilot must complete after entering the cockpit but before activating the starter. It typically includes preflight briefings, seat and seatbelt adjustment, document checks, fuel selector position, electrical and avionics setup, circuit breakers, and confirmation that the area around the propeller is clear.

Context Anchor

Seen as a checklist section during preflight preparation, just before the pilot starts the engine.