As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STAB TRIM CH 2 WILL NOT TEST. TRIM WILL KICK OFF WHEN ATTEMPTING TO RUN THE TRIM WITH JUST STAB TRIM CH 2 AND MACH TRIM ENGAGED. REMOVED AND REPLACED THE HORIZONTAL STABILIZER ACTUATOR AND HORIZONTAL STABILIZER MOTOR CONTROL UNIT IAW MM 27-42-05. OPS CHECK GOOD. S/N OFF: 1152. MOTOR CONTROL UNIT P/N OFF: 7062-3, S/N OFF: 1184.