As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING UNSCHEDULED MAINTENANCE, IT WAS FOUND THAT THE NLG TRAILING ARM PIN MIGRATED TO THE LEFT, DUE TO MISSING SAFETY HARDWARE. AIRCRAFT WAS REMOVED FROM SERVICE AND NEW NLG TRAILING ARM PIN AND NLG PROXIMITY SENSOR COVER WERE REPLACED. BOMBARDIER AND GOODRICH HAS BEEN NOTIFY OF THIS EVENT. (A/C MAKE AND MODEL; DHAV-DHC8403)