Delay in Park Brake Engagement/FMVSS 121

Alexis Fire Equipment Company (Alexis Fire) is recalling certain 2021-2024 Fire Apparatus vehicles built on Spartan Chassis. A defect in the inversion valve may delay park brake engagement, which could allow the vehicle to move unintentionally. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 121, "Air Brake Systems."