What was found
THE AREA OF DIFFICULTY APPEARS TO HAVE ORIGINATED WITHIN A WIRE BUNDLE THAT SERVICES THE ALTERNATOR. THIS BUNDLE OF WIRES (4 WIRES OF AWG 20 SIZE EACH, APPROX 4 FT), RUNS FROM THE VOLT REG LOCATED ON THE UPPER LT SIDE OF THE FIREWALL, TO THE ALTERNATOR, WHICH IS LOCATED ON THE UPPER PORTION OF THE REAR CASE ON A P&W 1340 ENG. TO FURTHER DESCRIBE THE WIRE BUNDLE, THE 4 WIRES WITHIN HAD BEEN LIGHTLY TWISTED TOGETHER AND THIS ASSY HAD BEEN PLACED WITHIN A SLEEVE/TUBING OF SHIELDING- GROUNDING BRAIDED WIRE. IT APPEARS VIBRATION HAD CAUSED SOME CHAFING TO OCCUR WITHIN THE BUNDLE AND , POWER WENT TO GROUND AND THE WIRES MELTED, CAUSING THE SMOKE AND ODOR.