As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO THE STABILIZER TRIM WITHOUT MOVEMENT. MAINTENANCE PERSONNEL PERFORMED REVISION DETECTING THE STAB TRIM MOTOR DAMAGED; SO THE STAB TRIM MOTOR P/N 6355C0001-02 WITH S/N 2511 WAS REPLACED IAW AMM 27-41-71 AND THE FIM 22-11 TASK 801 PROCEDURE WAS PERFORMED, TESTED CORRECT.