What is the maximum speed that must not be exceeded for a stuck windshield wiper in the CRJ 900/700?

The maximum speed that must not be exceeded for a stuck windshield wiper in the CRJ 900/700 is 250 KIAS. This limitation is specifically set to prevent potential damage to the windshield wiper system and ensure safe operation of the aircraft under conditions where the wipers are unable to function. Exceeding this speed with a stuck windshield wiper could lead to excessive aerodynamic forces on the wiper mechanism, which might compromise its integrity or even cause it to detach.

Maintaining the aircraft speed below this threshold enhances safety by minimizing the risk associated with an obstructed view, which is critical for maintaining situational awareness, especially in adverse weather conditions. Thus, adhering to this speed limitation is crucial for safe flying operations in the CRJ 900/700.