As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR EXTENSION FOR LANDING, THE NOSE GEAR FAILED TO EXTEND. THE AIRCRAFT RETURNED TO FIELD AND CYCLED THE GEAR WITH EMERGENCY HANDLE. NOSE GEAR EXTENDED AND A SUCCESSFUL LANDING WAS MADE. TROUBLESHOT THE SYSTEM AND THE PRIORITY VALVE WAS FOUND DEFECTIVE. THE PRIORITY VALVE WAS REPLACED AND SYSTEM OPERATED NORMAL.