As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTED PRIMARY TRIM WAS INOP. ALTERNATE TRIM WORKED NORMALLY. ALL SWITCHES AND CIRCUIT BREAKERS WERE IN NORMAL POSITIONS. PERFORMED TROUBLESHOOTING PROCEDURES IAW MM 27-40-0. VERIFIED BAD PRIMARY LONGITUDINAL TRIM CONTROL CIRCUIT BREAKER. REMOVED AND REPLACED CIRCUIT BREAKER IAW SWP 20-10-3. OPS CHECKED GOOD.