Pitch control becomes unresponsive; the elevator does not respond to cockpit input.

• A. Elevator System Jammed
• B. Rudder System Jammed
• C. Stabilizer Trim Runaway
• D. Unreliable Airspeed

Answer: (A)

When pitch control isn’t producing any elevator movement, the most likely issue is a jam in the elevator system. The elevator is the primary control surface that changes the aircraft’s pitch, so if your cockpit input does not cause the elevator to move at all, a mechanical or hydraulic obstruction preventing that movement fits the symptom best.

Rudder jam would affect yaw, not pitch, so it wouldn’t explain the lack of elevator response to pitch input. Stabilizer trim runaway involves the stabilizer trimming on its own, often with the aircraft becoming uncontrollable in trim, rather than a complete lack of response to manual elevator commands. Unreliable airspeed affects speed readings and related indications, not the ability of the elevator to respond to pilot input.