As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING MAINTENANCE, PILOT FELT AN USUALLY HIGH VIBRATION LEVEL DURING LANDING. A POST FLIGHT INSPTION REVEALED A CORDWISE CRACKS FROM THE TRAILING EDGE TO THE AFT SIDE OF THE SPAR ON THE TOP AND BOTTOM SKINS. THE BLADE WAS REPLACED WITH P/N 109-0103-01-115 S/N P127. THE TRACK AND BALANCE AND OPERATIONAL CHECK FLIGHT WAS PERFORMED WITH NO DEFECTS NOTED.