What was found
DURING CLIMB OUT AT APPROXIMATELY 12,000 FEET FROM DFW THE FWD CABIN DOOR ANNUNCIATOR ILLUMINATED. THE PILOT PROCEEDED WITH THE EMERGENCY CHECKLIST ITEMS. PILOT DECIDED TO RETURN TO DFW, PILOT DID NOT DECLARE AN EMERGENCY & LANDED WITHOUT INCIDENT. DFW MX INSPECTED AIRCRAFT & DETERMINED THE DOOR WAS SECURELY LATCHED, MX TROUBLESHOOTING REVEALED DOOR SWITCH WAS OUT OF ADJUSTMENT. MICRO SWITCH WAS ADJUSTED IAW BEECH AIRCRAFT MM 52-70-00, ALL OPERATIONS CHECKED NORMAL.