As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING 100 HOUR INSPECTION A "TONAL" DIFFERENCE WAS NOTED ON THE MAIN ROTOR BLADE IN THE AREA CALLED OUT IN SEC.90 OF THIS SNEET ABOUT 1/4 INCH AFT OF THE LEADING EDGE ON THE UPPER SURFACE. DUE TO NUMEROUS PREVIOUS PROBLEMS WITH THIS MANUFACTURER (HTC)