What was found
(CAN) PILOT NOTICED SMOKE IN THE COCKPIT WHILE IN FLIGHT. HELICOPTER WAS LANDED SAFELY. LOWER ACTUATOR BEARING ASSY WAS FOUND TO HAVE SHIFTED REARWARD ON FANSHAFT CAUSING BEARING HOUSING TO COME INTO CONTACT WITH FANWHEEL. ROTATING FANWHEEL ASSEMBLY BOLTS GROUND THEIR WAY INTO THE BEARING ASSY HOUSING, CREATING EXCESSIVE HEAT AND SMOKE, ASSUMED. NOTE, IN NORMAL OPERATION, FANWHEEL TURNS, BEARING HOUSING REMAINS STATIONARY, WITH ONLY INTERNAL BEARING ROTATING WITH THE FANSHAFT.