What was found
(CAN) DURING AN AREA INSPECT, MECHANIC NOTICED THAT GROUND STUD & WIRE FOR GROUND POWER RECEPTICLE APPEARED BURNED. ON INVEST FOUND CONNECTION LOOSE & FUSELAGE LUG, GROUND STUD & WIRE TERMINAL BURNED & OVERHEATED. ACCORDING TO PARTS LIST IN WIRING MANUAL GROUND STUD INCORRECTLY ASSEMBLED. STUD WAS LAST ASSEMBLED WHEN A/C WAS BUILT. STUD BOLT SHOULD BE AN AN6-10 BUT WAS A-5 & WAS MISSING SOME WASHERS THAT ARE CALLED OUT IN PARTS LIST & WIRING MANUAL.