As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL, CREW REPORTED THEY PUT THE LANDING GEAR LEVER DOWN, AFTER 10 SEC GEAR NEVER EXTENDED. CREW HAD TO UTILIZE THE MANUAL RELEASE TO DROP THE GEAR FOR LANDING. MAINTENANCE FOUND THE LANDING GEAR SELECTOR VALVE WAS AT FAULT AND IT WAS REPLACED.