What is the limitation for thrust reverser operation in terms of airspeed?

The thrust reverser operation limitation is a critical safety measure in the ERJ 170/175 aircraft. The correct limit is that thrust reversers must be stowed below 60 KIAS (Knots Indicated Airspeed). This regulation helps ensure that the reversers do not deploy at inappropriate airspeeds where aerodynamic loads on the aircraft could create control issues or damage.

By requiring the thrust reversers to remain stowed above 60 KIAS, the manufacturer has prioritized the aircraft's handling characteristics and structural integrity during flight. At higher speeds, deploying thrust reversers could disrupt airflow over control surfaces or introduce excessive stress to the airframe. This guideline helps maintain safety margins and is an important consideration for pilots during both landing and rollout phases.