As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STABILIZER TRIM JAMMED FROM TOP OF DESCENT, WOULD NOT STRIM NOSE UP. COMPLIED WITH ALTERNATE PROCEDURE. CLEANED AND LUBED STAB TRIM JACKSCREW DUE TO EXCESSIVE MOISTURE. REPLACED MAIN STAM ACTUATOR, ACTUATED STAB TRIM FULL TRAVEL AND NO DEFECTS NOTED.