Can Experience Inadvertent Disengagement Without Clear Annunciation
The FAA has issued a Special Airworthiness Information Bulletin (SAIB) concerning for certain Honeywell/Bendix King autopilots (AP). According to the SAIB, the autopilots can experience inadvertent disengagement without clear annunciation to the pilot and may also fail to engage with conflicting annunciation to the pilot. These failure conditions are the result of a resistor that can fail open in the autopilot computer.