As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)WHEN LANDING GEAR SELECTED DOWN ON APPROACH, IT APPEARED NOSE LANDING GEAR DOORS WERE SLOW TO OPEN. THIS CONDITION WAS FOLLOWED BY A LOUD NOISE. SUBSEQUENT MAINTENANCE INVESTIGATION FOUND NOSE LANDING GEAR ACTUATOR UPPER BOLT MISSING. MAINTENANCE ACTION INVOLVED REPLACING HOUSING ACTUATOR, RETRACT ACTUATOR AND INSTALLING NEW BOLT. CHECK RETRACTIONS CARRIED OUT SERVICEABLE.