As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN SETTING STAB TRIM FOR TAKE OFF, NEITHER YOKE TRIM SWITCH WOULD ACTIVE ELECTRIC TRIM MOTORS. TRIM WHEELS COULD BE MOVED MANUALLY. MAINTENANCE ACCOMPLISHED STM INTERNAL LOGIC RESET IAW FIM 27-41-00. PERFORMED STAB. ELEC. TRIM SYS. REPAIR CONFIRMATION, OPS. CHECKED NORM. DFCS BITE SHOWS NO RELATED FAULTS ON CURRENT STATUS OR FLIGHT HISTORY.