As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DAILY INSPECTION OF TAILROTOR DRIVESHAFT BEARINGS FOR OVERHEATING. NR 4 TAILROTOR DISC, (ONE) FORWARD IS CRACKED, PROBABLE CAUSE IS EXCESSIVE RIGIDITY IN THE BEARING MOUNT SYSTEM. ALLOW THE TAILROTOR DRIVESHAFT TO FLOAT SO DISC PACKS DO NOT FLEX AS MUCH OR AS OFTEN. (M)