As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR HARDWARE: UPON OPENING DOOR FOR FIRST LIGHT OF THE DAY, WE FOUND THE FORWARD MAIN CABIN DOOR STRIKER PLATE LAYING ON THE FLOOR. IT LOOKS LIKE IT HAS BROKEN OFF ON AFT SIDE ON T THE FUSELAGE SIDE. CORRECTIVE ACTION: REPLACED STOP BOLT. OPS CHECK GOOD. IAW CL650 AMM 52-11-10.