As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WARNING HORN: REPEAT. ON PRE FLIGHT WARNING HON WORKED WITH SEVERAL CHECKS USING ROTORY TEST. IN FLIGHT WARNING HORN INOP AT ALL ALTITUDES ON POST FLIGHT LANDING GEAR WARNING HORN INOP USING ROTORY TEST. LIGHTS (3 GREEN 1 RED) GEAR INDICATORS WORKS.