What was found
THIS HAS BEEN THE SECOND OCCURRENCE IN WHICH THE T/R SPHERICAL BEARINGS HAVE FAILED. THE FIRST OCCURRED AT ACTT: 138.2 HOURS IN WHICH THE MECHANIC FOUND THE BEARING ELASTOMERS TORN BEYOND LIMITS. THE SECOND FAILURE OCCURRED AT 748.7 HOURS ACTT, PART TT, 610.5 HOURS . PILOT NOTED A VIBRATION IN THE AIRFRAME. UPON INSPECTION, THE MECHANIC NOTED THE SPHERICAL BEARING ELASTOMERS WERE COMPLETELY WORN THROUGH. BOTH THESE FAILURES OCCURRED ON AN AIRCRAFT WITH A TT OF 748.7 HOURS. (X)