As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE WIRES ON THE BACK SIDE OF THE CANNON PLUG (INSIDE HOUSING) ARE BURNED THROUGH THE INSULATION AND SEEM TO HAVE BEEN ARCING ON THE BACK SHELL. IT APPEARS AS IF THE WIRES WHEN ENCLOSED IN THE HOUSING ARE BENT OVER VERY SHARPLY AND STAY THAT WAY. THE INSULATION BECOMES BRITTLE, CRACKED,AND BEGAN ARCING. THIS HAPPENS JUST OUTSIDE OF THE RUBBER GROMMET THE WIRES PASS THROUGH. (X)