What was found
AIRCRAFT EXPERIENCED LOSS OF TAIL ROTOR CONTROL DURING FLIGHT. PILOT REPORTED HE COULD ONLY SLIGHTLY MOVE TAIL ROTOR PEDALS. PILOT EXECUTED A SUCCESSFUL RUN-ON LANDING ON A HARD SURFACE RUNWAY WITHOUT CAUSING ANY DAMAGE TO ACFT. EXAMINATION OF THE ACFT REVEALED THE ROTATING SPIDER (PN 350A33-2129-00) HAD BEEN COMPLETELY SEVERED AND THE TAIL ROTOR WAS BEING DRIVEN BY PITCH CHANGE LINKS. THE SPIDER BEARING (PN 6010-2RS1MT33CA) APPARENTLY SEIZED AND CUT THROUGH THE ROTATING SPIDER. SPIDER ASSY WAS REMOVED FROM ACFT FOR FURTHER EVALUATION. PART TAGGED WITH FAA FORM 8020-2 (ACFT/PARTS IDENTIFICATION AND RELEASE). ROTORCRAFT CERTIFICATION OFFICE (ASW-170) WAS NOTIFIED OF THE MALFUNCTION AND PART DISPOSITION.