What was found
MAIN DOOR: AMBER CAS DISPLAYED . DOOR IS CLOSED . RESET CHECK DIDNT WORK. COMPLETE SHUT DOWN TO RESET DIDNT WORK EITHER . // SIGNOFF // MAIN DOOR: AMBER CAS DISPLAYED . DOOR IS PERFORMED CABIN DOOR LATCHING/LOCKING SYSTEM & DOOR WARNING SYSTEM IAW 680A CESSNA M/M 52-70-00 SECTION 3 CABIN DOOR LOCKED EXCEPT CABIN DOOR LOCK LIGHT FAILED TO EXTINGUISH AFTER NUMEROUS ATTEMPTS. CALLED TEAM LATITUDE THEY SUGGESTED RESETTING PCB CARDS NC101 & NC105. GAINED ACCESS TO PCB BOX L/H COCKPIT PILOT SEAT CONSOLE IAW 680A CESSNA WIRE DIAGRAM 52-10-01. RESEATED PCB CARDS NCI0I & NC105. PERFORMED CABIN DOOR LATCHING/LOCKING SYSTEM & DOOR WARNING SYSTEM IA W 680A CESSNA M/M 52-70-00 SECTION 3 SYSTEM OPS CHECKED GOOD. RETURNED AIRCRAFT TO ORIGINAL CONFIGURATION.