As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLIGHT CREW REPORTED THAT THE NLG DOORS REMAINED OPEN AFTER THE LANDING GEAR HAD RETRACTED. THE LANDING GEAR WAS SELECTED DOWN AND THE ACFT RETURNED TO THE AIRPORT WITHOUT INCIDENT. PSEU FAULT INDICATES THE NLG DOOR CLOSED PROXIMITY SENSOR IS SHORTED. NLG DOOR CLOSED PROXIMITY SENSOR REPLACED.