What was found
DURING CLIMB OUT, THE PILOT REPORTED THAT THE CABIN DOOR WARNING LIGHT ILLUMINATED & THE CABIN PRESSURIZATION WAS CLIMBING. THE PILOT DECLARED AN EMER, RETURNED & LANDED WITHOUT INCIDENT. TROUBLESHOOTING OF THE CABIN DOOR WARNING LIGHT & PRESSURIZATION SYS REVEALED THE FOLLOWING. THE CABIN DOOR FWD LOWER & FWD MID POSITION, CLICK CLACK, LATCHES OUT OF ADJUSTMENT. ADJUSTED CLICK CLACKS & PERFORMED OPERATIONAL CHECK OF CABIN DOOR. OPERATIONAL CHECKS WERE NORMAL. THE AUTO PRESSURIZATION CONTROLLER WAS DEFECTIVE. REPLACED THE AUTO PRESSURIZATION CONTROLLER WITH A SERVICEABLE UNIT. THE PRESSURIZATION SYS OPERATIONAL CHECK WAS SATISFACTORY.