What is the maximum speed for autopilot engagement on the ERJ 170/175?

The maximum speed for autopilot engagement on the ERJ 170/175 is indeed 250 KIAS. This limitation is crucial for safe operation because the autopilot system is designed to function effectively within a specific range of airspeeds. Engaging the autopilot beyond this maximum speed can lead to impaired maneuverability and increased strain on the aircraft's systems. Operating within these limits ensures that pilots can maintain better control and the autopilot can respond appropriately to commands, contributing to overall flight safety.

In the context of the ERJ 170/175, this limit is established based on the aircraft's aerodynamic characteristics and the performance of its autopilot systems. Therefore, staying within the 250 KIAS limitation during autopilot operation is essential for compliance with operational guidelines and ensuring safe flight conditions.