What was found
TAIL ROTOR CABLE (PN S6140-65612-11) WAS FOUND BADLY FRAYED AND BROKEN AFTER PILOT MADE AN UNEVENTFUL LANDING, AT AN AIRPORT. THE PROBABLE CAUSE IS THE CABLE HAD BEEN ROUTED OVER THE CABLE GUARD PIN INSTEAD OF THE PULLEY. THE CABLE IS BEING SENT OUT FOR METALLURGY AND FAILURE ANALYSIS. OPERATOR CALLED FSDO TO ADVISE THAT METALLURGY ANALYSIS RESULTS INDICATED THAT THE CABLE FAILURE WAS A RESULT OF WEAR. OPERATOR WILL CIRCULATE A LETTER TO ALL FIELD AND SHOP MECHANICS ADVISING REMOVAL OF GUIDE PINS UNTIL RIGGING IS COMPLETED, WHEN INSTALLING CABLE. THIS IS THE PROCEDURE USED FOR THE S61 CIVILIAN MODELS. (K)