Final answer:
A takeoff configuration warning alerts pilots if their airplane is not properly set for takeoff when the thrust levers are above 70% N1. It checks for correct flap and slat settings, parking brake engagement, and stabilizer trim position.
Step-by-step explanation:
The takeoff configuration warning is an important safety feature in modern aircraft designed to alert pilots if their airplane is not properly configured for takeoff. This warning system is activated when certain conditions are met, typically when the thrust levers are advanced above 70% N1, but the aircraft configuration is incorrect—this can include situations such as the flaps and slats not being set to the required position for takeoff, the parking brake being engaged, or the stabilizer trim being outside of the takeoff range. These measures ensure that the aircraft adheres to the necessary safety protocols before liftoff to avoid potential accidents.