What was found
(CAN) AIRCRAFT RETURNED TO BASE DUE TO SMOKE AND ELECTRICAL SMELL IN COCKPIT. ALL AVIONICS EQUIPMENT, WIRING, LIGHTING, RHEOSTATS, INSPECTED SATISFACTORY. FAULT FOUND IN GPS COOLING FAN. THE FAN WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.NO FURTHER EVIDENCE OF SMOKE OR SMELLS IN COCKPIT OCCURRED.