As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, PILOT REPORTS THAT THE ELEVATOR TRIM FAILED IN THE PILOT, CO-PILOT AND AUX MODES. REDUCED POWER TO INCREASE CONTROLLABILITY OF THE AIRCRAFT AND RETURNED TO OPF. AFTER LANDING, THE TRIM BEGAN TO WORK AGAIN. MAINTENANCE FOUND THAT THE PITCH TRIM ACTUATOR WAS WEAK, AND REPLACED THE UNIT. AWAITING TEARDOWN REPORT ON TRIM ACTUATOR. TEARDOWN EVALUATION TO FOLLOW IN A SUPPLEMENTAL REPORT.