As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A DEFECTIVE EMERGENCY LANDING GEAR EXTENSION VALVE. SPECIFICALLY THE INTERNAL O-RING SEALS WERE FOUND TORN AND DAMAGED. THIS CONDITION WAS DETERMINED TO BE CAUSING THE LANDING GEAR EMERGENCY EXTEND LEVER FROM PROPERLY FUNCTIONING, AS WELL, IT CAUSES THE LANDING GEAR PUMP HYD PRESSURE TO BYPASS IN THE RETRACT FUNCTION. THIS CONDITION ALONG WITH AN INOPERATIVE ALTERNATOR/ELECTRICAL FAILURE IN FLIGHT, CAUSED A GEAR UP LANDING.