As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WIRES LF11 AND LF12 ARE ROUTED THROUGH THE VERTICAL STABILIZER WITHOUT PROTECTION OR SUPPORT. THESE WIRES POWER THE FLASHING RED BEACON MOUNTED ON THE TOP OF THE FIN. BOTH WIRES CHAFED AGAINST THE EDGE OF THE HOLE IN THE STABILIZER RIB THROUGH WHICH THEY WERE ROUTED AND WORE THROUGH THE INSULATION CAUSING A SHORT CIRCUIT AND THE BREAKER TO OPEN.