As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE DOWN AND LOCKED INDICATION, 3 GREEN LIGHTS, DID NOT ILLUMINATE AFTER ATTEMPTING TO EXTEND THE LANDING GEAR. AFTER SEVERAL ATTEMPTS THE GEAR WAS FULLY EXTENDED AND THE 3 GREEN LIGHTS ILLUMINATED. IT WAS LATTER DISCOVERED THAT THE HYDRAULIC POWER PACK FAILED TO FULLY EXTEND AND LOCK THE LANDING GEAR, WHILE ON FINAL APPROACH.