As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED A STRANGE VIBRATION IN THE HELICOPTER. UPON INVESTIGATION ENGINEERING FOUND THE UPPER LEADING EDGE LUG OF THE BLADE CRACKED AND BROKE LOOSE FROM THE BLADE AND ONE BLADE RETENTION PIN BENT. MAIN ROTOR BLADE AND BLADE RETENTION PINS WERE REPLACED. AS A PRECAUTIONARY MEASURE MAIN ROTOR HUB LEAD LAG LINKS WERE REPLACED. REMAINING BLADES, LINKS AND PINS WERE CHECKED AND FOUND SERVICEABLE. (X)