As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LANDING GEAR DID NOT EXTEND WHEN LANDING GEAR SELECTED DOWN. 3 RED LIGHTS AND HANDLE RED LIGHTS ONLY. LANDING GEAR DID EXTEND AFTER APPROXIMATELY 2 MINUTES WHILE HANDLE WAS STILL SELECTED DOWN. MAINTENANCE REPLACED THE LDG SELECTOR VALVE, SELECTOR VALVE CONNECTOR, AND LANDING GEAR CONTROL PANEL.