As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR IN TRANSIT WARNING STAYED ON AFTER GEAR SELECTED UP, FOLLOWING TAKEOFF. PILOT RETURNED TO TAKEOFF AIRFIELD FOR UNEVENTFUL LANDING. SUBSEQUENT INSPECTION DETERMINED ALL GEAR FUNCTIONS WERE NORMAL. ERRONEOUS IN TRANSIT WARNING DETERMINED TO BE CAUSED BY FAULTY LG WARNING HORN FLASHER.