As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) MAIN ROTOR HUB SEVERELY CRACKED IN AN AREA NOT KNOWN FOR CRACKING. FOLLOWING TAKEOFF CONTROL WAS ALMOST IMPOSSIBLE AND THE MASSIVE VIBRATION CAUSED THE FORE/AFT ENGINE MOUNT TO BE TORN FROM ITS HOUSING AND THE SHAFT TO CRACK. THE CRACK WAS OPENINGUP UNDER LOAD AND CAUSING A MASSIVE OUT OF BALANCE VIBRATION. THE SEPARATION OF THE MAIN ROTOR BLADE WAS CONSIDERED IMMINENT.