What was found
DESCENDING THROUGH APPROXIMATELY FL 340 GOT PITCH TRIM ANNUNCIATOR. DISENGAGED AUTOPILOT & REALIZED IT WAS A JAMMED ELEVATOR TRIM. RAN CHECKLIST WHILE MAKING DECENT TO LOWER & WARMER ALTITUDE. AFTER LEVEL AT 4000 FEET FOR APPROX FIVE MINUTES ELEVATOR TRIM UNJAMMED & OPERATED NORMALLY. VISUALLY INSPECTED ELEVATOR TRIM CABLES IN HORIZONTAL STABILIZER & EMPENNAGE, NO DEFECTS NOTED AT THIS TIME. LUBRICATED LT & RT ELEVATOR TRIM TAB ACTUATORS WITH PN GREASE 5565450-28 IAW AMM, CHAPTER 12-21-01. OPERATED SYS 4 FULL CYCLES BY HAND & 4 FULL CYCLES WITH ELEC TRIM & OPERATIONAL CHECKS GOOD AT THIS TIME.