When using the thrust reversers, when does the PF reduce them to idle?

When using the thrust reversers, when does the PF reduce them to idle?

• A. At touchdown
• B. Immediately after deployment
• C. When runway length is reached
• D. By 60 kt

Answer: (D)

The main idea is when to transition from reverse thrust to idle during the landing rollout. After touchdown, thrust reversers are used to help decelerate, but you don’t stay in full reverse forever. As airspeed falls to about 60 knots, the PF reduces reverse thrust to idle so that wheel braking and aerodynamic braking can take over effectively. Keeping reversers in full reverse below this speed offers little extra deceleration and can make handling and braking less predictable, so idling the reversers around 60 knots provides a smoother, more controlled stop and prepares the aircraft for taxi. So, the best timing is to bring thrust reversers to idle by approximately 60 knots.

The main idea is when to transition from reverse thrust to idle during the landing rollout. After touchdown, thrust reversers are used to help decelerate, but you don’t stay in full reverse forever. As airspeed falls to about 60 knots, the PF reduces reverse thrust to idle so that wheel braking and aerodynamic braking can take over effectively. Keeping reversers in full reverse below this speed offers little extra deceleration and can make handling and braking less predictable, so idling the reversers around 60 knots provides a smoother, more controlled stop and prepares the aircraft for taxi.

So, the best timing is to bring thrust reversers to idle by approximately 60 knots.