What was found
IT WAS REPORTED AS THE AIRCRAFT WAS COMING IN FOR A 200-HOUR INSPECTION. A SLIGHT BUMP COULD BE FELT IN FLIGHT; DURING THE INSPECTION, ALL PC LINK ROD ENDS, AND BOLTS WERE INSPECTED, AND THE BLUE UPPER BOLT WAS FOUND TO HAVE A STEP WORN INTO IT, THE BOLT WAS REPLACED, AND MR TRACK AND BALANCE WERE PERFORMED, AND NO FURTHER MAINTENANCE WAS REQUIRED.