As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO EXTEND IN FLIGHT, GEAR WAS HAND CRANKED DOWN AND A SAFE LANDING WAS MADE. AIRCRAFT WAS PLACED ON JACKS AND THE LANDING GEAR CYCLED IAW MM. THE RELAY CONTROL STICK IN THE UP POSITION WHEN THE GEAR WAS CYCLED. RELAY WAS REMOVED AND A NEW RELAY INSTALLED. LANDING GEAR OPERATIONAL CHECK OF THE SYSTEM WAS MADE. LANDING GEAR CHECKED NORMAL.