As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INSTALLED VAN HORN TAIL ROTOR BLADES ON AN ACFT FOR FLIGHT TRIALS. THE STC STATES TO DISREGARD THE MM REGARDING TAIL ROTOR FRICTION HOWEVER WHEN MEASURED FRICTION FOUND TO BE 14 LBS. ACFT FLOWN AND THERE WAS NO DECREASE IN PEDAL FORCE AS DESCRIBED IN THE STC OR VERBALLY FROM VAN HORN. BOTH BLADES REMOVED AND SENT FOR EVALUATION, AND RECEIVED REPORT THAT 1 FEATHERING BEARING WAS OVERSTAKED.