Definition
A series of checks performed in the run-up area before takeoff to verify that the engine, ignition system, flight controls, and instruments are functioning correctly. For ignition systems specifically, this includes a magneto check, where each magneto is tested individually to confirm both are operating and producing an acceptable RPM drop within manufacturer limits.
Plain English
The final set of checks a pilot runs through after taxiing to the runway and before lining up for takeoff, to make sure the aircraft is safe to fly. It includes testing each magneto separately to confirm both ignition systems are working.
Context Anchor
Used during the before-takeoff or run-up portion of a flight, especially while checking engine operation before entering the runway.
Derivation
Pre-' means 'before,' from Latin prae. So a pretakeoff check is simply a check done before takeoff. The hyphen is sometimes dropped in FAA usage.
Why Pilots Care
Confirms ignition, engine, and control functionality so that any issue can be corrected on the ground rather than discovered after liftoff.
Intuition Check
Do not read “check” here as a quick glance. A pretakeoff check is a deliberate checklist procedure completed before the airplane begins the takeoff.
Example Sentence 1
During the pretakeoff check, the pilot noticed an excessive RPM drop on the right magneto and returned to the ramp for maintenance.
Example Sentence 2
Any discrepancy found during the pretakeoff check must be resolved before taxiing onto the active runway.