As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) BRAKE UNIT WAS APPROACHING WEAR LIMIT IAW AMM, AND AS A RESULT ELECTED TO CHANGE THE ASSEMBLY. UPON REMOVAL OF THE ASSOCIATED MAIN WHEEL, 5 OF THE CENTRE ROTOR DRIVE KEYS WERE FOUND SHEARED FROM THE ROTOR ITSELF. MINOR DAMAGE WAS NOTED ON THE MAIN WHEEL HEAT SHIELD SUBASSEMBLIES.