As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LANDING GEAR DISAGREE INDICATION AFTER GEAR SELECTED UP ON TO. QRH FOLLOWED AND LANDING GEAR SUCCESSFULLY EXTENDED ON NORMAL SYSTEM. POST LANDING INSPECTION CARRIED OUT AND NOSE GEAR DOORS WOULD NOT OPEN USING GROUND SELECTOR SWITCH. TROUBLE SHOOTING CONFIRMED NLG DOOR SELECTOR VALVE WAS INTERMITTENT. VALVE WAS RECEIVED FROM BOMBARDIER STORES IN AN "INSPECTED" CONDITION, PART PREVIOUS HISTORY UNKNOWN. (TC# 20191016012)