As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, FLIGHT CREW SELECTED GEAR DOWN. GEAR DID NOT EXTEND. SECOND ATTEMPT WAS TRIED WITH SAME RESULTS. LANDING GEAR WAS EXTENDED USING EMERGENCY EXTENSION PROCEDURES. LANDING . INVESTIGATION REVEALED FAULTY CONNECTOR ON LANDING GEAR SELECTOR VALVE. CONNECTOR REPLACED, LANDING GEAR LINES PURGED, HYD SERVICED AND BLED. GEAR SWINGS PERFORMED WITH NORMAL RESULTS.