During landing, maximum reverse thrust is prohibited below what speed?

• A. 60 KIAS
• B. 75 KIAS
• C. 85 KIAS
• D. 90 KIAS

Answer: (B)

After touchdown, thrust reversers should be used to assist deceleration, but there’s a minimum airspeed below which applying maximum reverse thrust can cause control and engine issues. The number given—75 KIAS—reflects the speed at which the reverser provides safe, effective braking without introducing undesirable handling or mechanical stresses. Above 75 knots, maximum reverse thrust helps you slow efficiently while keeping control predictable. Below 75 knots, the reverser is restricted to prevent problems with steering, pitch, or engine loading, so pilots rely on wheel brakes and other braking means instead. The other speeds are either too low to ensure effective, safe reversal or exceed the recommended limit for using maximum reverse thrust in the landing phase.