As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLT, THE LEFT MAIN LANDING GEAR DOOR CAME OPEN. A/C LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT SYSTEM. FOUND THE LEFT FORWARD DOOR ACTUATOR AT FAULT. THE ACTUATOR WAS REMOVED AND REPLACED IAW DHC MM. OPERATIONAL AND LEAK CHECKED GOOD. A/C RETURNED TO SERVICE. (M)