What was found
DURING MAINTENANCE INSPECTION FOUND THAT WITH GROUND POWER APPLIED AND AIRCRAFT POWER ON, A STRONG BURNING ODOR AND SMOKE WAS OBSERVED COMING FROM UNDER COCKPIT FLOOR. THE AIRCRAFT WAS REMOVED FROM SERVICE. ACCESSED COCKPIT FLOOR PANELS, PERFORMED GENERAL VISUAL INSEPCTION FOR DAMAGE. PERFORMED OPERATIONAL CHECKS. INSPECTED EXTERNAL POWER RECEPTACLE, LEFT AND RIGHT POWER DISTRIBUTION BOXES. CHECKED TORQUE OF ELECTRICAL CABLE TO WINDSHIELD TEMPERTURE CONTROLLER. AUTOPILOT FUNCTIONAL TEST. NO EVIDENCE WAS NOTED OVER A PERIOD OF 3 DAYS. ALL SYSTEMS CHECKED GOOD. NO DAMAGE WAS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.