As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REMOVED DUE TO SUSPECTED INTERNAL HUB COMPONENT FAILURE. BLADE S/N 4152 WAS FOUND TO ROTATE FREELY +/- 12.5 DEGREE POST FIRST GROUND RUN AFTER INSTALLATION. INSPECTION AFTER DISASSEMBLY REVEALED ONE BROKEN B-6545 PITCH CHANGE KNOB CAM FOLLOWER. THIS PART WAS INSTALLED NEW AT OVERHAUL AND FAILED ON FIRST GROUND RUN.