What was found
INVESTIGATED PROBLEM OF SMOKE IN COCKPIT. SMOKE APPEARED TO BE COMING OUT OF THE ANTI-FOG VENTS. AFTER FURTHER INVESTIGATION SOME WIRING BEHIND COPILOTS MFD WERE FOUND TO BE SHORTED. IN MECHANIC`S OPINION, WIRING TO THE K10 RELAY CHAFED INSIDE HEAT SHRINKED AREA CAUSING A SHORT TO GROUND. AREA CONTAINS TWO RESISTORS (1 EA- 7.5 OHM 10 WATT, 1 EA- 10 OHM 5 WATT) AND A GROUND WIRE HEAT SHRINKED TOGETHER. ROUND WIRE VISIBLY BURNED. REPAIRED DAMAGED WIRING, REPLACED BOTH RESISTORS AND BOTH RELAYS THEN HEAT SHRINKED RESISTORS INDIVIDUALLY. INSPECTED ASSOCIATED WIRING IN BOTH CIRCUITS AND FOUND OK. DURING OPS CHECK, REGULATOR VALVE WAS FOUND TO BE FAULTY ALTHOUGH IT CHECKED GOOD WITH A MULTIMETER PRIOR TO OPS CHECK.