As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSPECTION FOUND LEFT HAND JACK SCREW ON PITCH TRIM ACTUATOR S/N 7082-08AA BROKEN. HIGH CYCLES AND HEAVY USE OF THRUST REVERSERS CAUSE VIBRATION IN THE TAIL WHICH COULD HAVE RESULTED IN THIS FAILURE. INSTALLED 4-3-86. LANDINGS SOH, 3,457.