What was found
SPINDLE BEARINGS FOUND TO BE BRINELLING AFTER 130 HOURS OF FLIGHT WITH NO REPORTED OVERSPEED. THIS IS THE SECOND TIME THIS HAS HAPPENED TO THIS HELICOPTER WITH IN THE SPAN OF 3 MONTHS. WITH THE BLADES REMOVED FROM THE HELICOPTER YOU CAN TURN THE SPINDLE AND HAVE THE BLADE ROTATE BEFORE THE SPINDLE BEARING MOVED OUT OF ITS DETENT. IT IS VERY OBVIOUS THAT THE BEARINGS HAVE CREATED A DETENT. IN FLIGHT YOU CAN FEEL AN ABNORMAL VIBRATION IN THE CYCLIC AND COLLECTIVE CONTROLS.