Definition
A written sequence of items the pilot completes after taxiing to the runway and before beginning the takeoff roll, used to verify that the airplane, engine, flight controls, and instruments are configured and functioning correctly for departure. It typically includes engine run-up checks, magneto and carburetor heat checks, flight control free-and-correct verification, instrument and avionics setup, fuel selector and mixture settings, flap configuration, trim setting, and a final review of takeoff briefing items.
Plain English
It is the list of checks a pilot works through just before taking off, to make sure the airplane is ready to fly safely.
Context Anchor
You use it near the runway before beginning the takeoff, often after the run-up and before entering the runway.
Why Pilots Care
Completing it ensures the aircraft is properly configured, preventing many common takeoff incidents caused by overlooked settings.
Intuition Check
Do not think of this as a casual to-do list or a memory aid you can skip. In flying, a checklist is a deliberate required check against the airplane’s procedures before moving to the next phase of flight.
Example Sentence 1
After taxiing to the run-up area, she set the parking brake and worked through the before takeoff checklist.
Example Sentence 2
After receiving takeoff clearance, the student completed the before takeoff checklist one last time.