As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN SELECTING GEAR DOWN ON APPROACH GOT A DISAGREE AND CANCELLED HORN, THEN HERD A CLUNK, THEN GEAR (NOSE DOOR AND GEAR RED) UNSAFE THEN GEAR WENT FULLY DOWN WITH 3 GREEN. MAIN NORMALLY AND NOSE 1 MIN LONGER TO GO DOWN. AFTER MX INVESTIGATION, FOUND THAT THE HOCK OF THE NOSE LANDING GEAR UPLOCK DON`T GO IN THE FULL OPEN POSITION. NLG UPLOCK REPLACED, SYS TEST SERVICEABLE, ACFT RETURN TO SERVICE.