What is the typical use of autobrakes and thrust reversers on landing?

• A. Autobrakes should never be used.
• B. Thrust reversers should be used before autobrakes.
• C. On wet runways, thrust reversers are not used.
• D. Used per procedure to optimize braking on landing, especially on wet runway.

Answer: (D)

The idea being tested is that landing braking is a coordinated, procedure-driven task that uses both autobrakes and thrust reversers to optimize stopping performance, with special attention to wet runways. Autobrakes provide a consistent, automatic deceleration once weight on wheels is sensed and the system is engaged, helping achieve a predetermined stopping profile without the pilot having to manually modulate each wheel brake. Thrust reversers are used after touchdown to add deceleration by redirecting engine thrust forward, boosting the overall braking effect and reducing wheel-braking demand. On a wet runway, this combination is particularly valuable because it helps compensate for reduced tire grip and longer stopping distances, making the aircraft come to a stop within the performance envelope when the procedure calls for it. Both systems are used in accordance with the published landing procedure, not in isolation or in the order of reverse thrust before braking, and not avoided on wet surfaces.