As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DISASSEMBLY OF ROTOR BRAKE. BRAKE ASSEMBLY DRIVE FLANGE AND HYDRAULIC DRIVE COUPLING HAD EXTREME HEAT DAMAGE AND METAL TRANSFER. THE DAMAGE CONTAINED TO THESE ITEMS PARTS WERE ORDERED AND REPLACED GROUND RUN MOC CHECKS COMPLETED AND AIRCRAFT RETURNED TO SERVICE. RE: AIRCRAFT SYSTEM MALFUNCTION / COMPONENT FAILURE.