As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED HIS TAIL BEACON INOPERATIVE. MX TECHS TROUBLESHOT THE WIRING AND FOUND THAT THE WIRING BUNDLE THAT CONTAINS THE POWER WIRE FOR THE TAIL BEACON WHERE IT ROUTES OVER THE GLOVE BOX HAD CHAFED ON THE GLOVE BOX. THE CHAFING CAUSED THE WIRE TO BURN THROUGH THE GLOVE BOX. (K)