As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR CONDITIONER FRESH AIR DOOR ACTUATOR INTERMITTENT AND STICKING IN FRESH AIR POSITION EVEN THOUGH RECIRCULATE POSITION SELECTED AND CAUSING COLD OUTSIDE AIR TO COME INTO CABIN DURING FLIGHT THAT OVERCOMES THE AIRCRAFT HEATING SYSTEM AND POTENTIALLY AFFECT EMS PATIENT CARE. AFTER TROUBLESHOOTING, REPLACED THE ACTUATOR. ACTUATOR RELIABILITY VERY POOR AND WAS JUST REPLACED AND HAS BEEN FAILING TO OPERATE ON AVERAGE OF AT LEAST ONCE PER YEAR