What was found
(CAN) FLT CREW REPORTED THAT THE ROTOR BRAKE HAD NO EFFECT WHEN APPLIED. THE ROTOR BRAKE PACK WAS BEING INSPECTED AND TO HAVE SHIMS ADJUSTED WHEN THE OUT PUT FLANGE LOCK NUT WAS FOUND ON THE DECK BELOW THE FLANGE. THE OUTPUT FLANGE WAS REMOVED AND INSPECTED WITH NO DAMAGE FOUND. THE MFG. SERVICE REP WAS CONTACTED AND HE ALSO INSPECTED THE PARTS. A NEW LOCK NUT AND WASHER WERE ORDERED AND WILL BE INSTALLED WITH THE PROPER INSTALLATION TOOL WHEN THEY ARRIVE. NOTE: THIS ASSEMBLY HAS NOT BEEN REMOVED OR REINSTALLED SINCE AQUIRING THIS AIRCRAFT A YEAR AGO.