As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A FUNCTIONAL CHECK OF THE BETA WARNING HORN, THE MECHANIC OBSERVED AN OPS CHECK FAILURE. THE MECHANIC R & R THE BETA WARNING HORN ASSY AND PERFORMED ANOTHER OPS CHECK WHICH PRODUCED A SATISFACTORY RESULT. THE ACFT WAS RETURNED TO SERVICE.