Takeoff configuration warning systems on a jet transport are activated by which conditions? (Pick the best two)

Takeoff configuration warning systems on a jet transport are activated by which conditions? (Pick the best two)

• A. Flaps position and fuel quantity
• B. Trim position and stabilizer position
• C. Throttle position and airspeed
• D. Landing gear position and cabin altitude

Answer: (B)

Takeoff configuration warnings are designed to flag when the airplane isn’t set up for a normal takeoff. The two settings that most directly affect the takeoff pitch and rotation are the elevator trim position and the horizontal stabilizer position. If the elevator trim isn’t in the takeoff range, the aircraft can require abnormal control forces and may not rotate smoothly at the proper speed. If the horizontal stabilizer isn’t set for takeoff, the aircraft’s pitch response can be off, increasing the risk of an improper rotation or tail strike. Because these two controls directly determine the takeoff attitude and how easily the nose can rise to the correct angle, they are the most critical indicators for the warning system. Other configuration items, while important, are less central to the immediate takeoff attitude and are not the primary triggers for this warning.

Takeoff configuration warnings are designed to flag when the airplane isn’t set up for a normal takeoff. The two settings that most directly affect the takeoff pitch and rotation are the elevator trim position and the horizontal stabilizer position. If the elevator trim isn’t in the takeoff range, the aircraft can require abnormal control forces and may not rotate smoothly at the proper speed. If the horizontal stabilizer isn’t set for takeoff, the aircraft’s pitch response can be off, increasing the risk of an improper rotation or tail strike. Because these two controls directly determine the takeoff attitude and how easily the nose can rise to the correct angle, they are the most critical indicators for the warning system. Other configuration items, while important, are less central to the immediate takeoff attitude and are not the primary triggers for this warning.