What was found
STAB CH 1 INOP STATUS MESSAGE TRIM NR 1 WON'T ENGAGE. REMOVED AND REPLACED STAB TRIM MOTOR CONTROL UNIT AND ACTUATOR, OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
STAB CH 1 INOP STATUS MESSAGE TRIM NR 1 WON'T ENGAGE. REMOVED AND REPLACED STAB TRIM MOTOR CONTROL UNIT AND ACTUATOR, OPS CHECK GOOD.