Final answer:
In aviation, the fadec (Full Authority Digital Engine Control) kills the engine for an overspeed to prevent damage.
Step-by-step explanation:
In aviation, the term 'fadec' stands for Full Authority Digital Engine Control. The fadec is responsible for controlling and monitoring the operation of an aircraft's engine. In the case of an overspeed, which refers to the engine exceeding its maximum allowable speed, the fadec takes action to prevent any potential damage by killing the engine fuel supply. This can include reducing the throttle, adjusting fuel flow, or shutting down the engine completely.