What was found
WIRE NUMBER P73G16N AT RT ENGINE FIREWALL GROUND POINT GS15 SEPARATED FROM THE WIRE TERMINAL DURING CRUISE FLIGHT. THIS WIRE CONNECTS GROUND TO THE GCU PIN G. THE RT GENERATOR OUTPUT SPIKED AND OPENED THE 325 AMP RT BUSS CURRENT LIMITER, THE 50 AMP RT INVERTER CURRENT LIMITER, AND DAMAGED RADIOS, THE GCU AND SYSTEMS WIRED TO THE RT BUSS. UPON INSPECTION, THE INSULATION OF P73G16N WAS FOUND STRIPPED TOO FAR FROM THE WIRE END THEREBY GIVING NO SUPPORT OF THE WIRE INTO THE TERMINAL AT THE INSULATION CRIMP AREA.