As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VERTICAL VIBRATION NOTICED IN FLIGHT. VIBRATION CEASED WHILE STILL IN FLIGHT. PILOT MADE AN UNSCHEDULED LANDING. VISUAL INSPECTION REVEALED 1 MAIN ROTOR BLADE EROSION PROTECTIVE TAPE HAD PEELED BACK AND A .7500 INCH X 3 INCH PORTION OF THE FIBERGLASS SKIN HAD DELAMINATED.