What was found
ON TAXI OUT THE NR 2 AC BUSS CIRCUIT BREAKERS POPPED OUT. SMELLED SMOKE IN COCKPIT, TAXIED BACK TO THE RAMP. FOUND BURNED WIRES AND FEEDER CABLES BELOW LAVATORY FLOOR FOR THE NR 2 GENERATOR, ALL THREE PHASES. GENERATOR FEEDER CABLES FOR NR 1 AND 3 GENERATORS ARE ALSO ALL 3 PHASES. GENERATOR FEEDER CABLES FOR NR 1 AND 3 GENERATORS ARE ALSO DETERIORATED. ACCOMPLISHED REPLACEMENT, BY SPLICING OF CABLES AT STATIONS 410-492 AND STA 535 IAW MM, 9 EA FOR AC BUS TIE FOR NR 2 ENGINE. ALL ELECTRICAL SYSTEMS, OPS CHECK NORMAL. AC RETURNED TO REVENUE SERVICE. (K)