As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FROM VPS PRIMARY STAB TRIM FAILED ACCOMPANIED BY C/B TRIPPING AND VISIBLE SMOKE/SPARKS SEEN AT SEAT 3D THROUGH SIDEWALL VENT. FOUND RELAY R20-16 BURNED. CHECKED WIRING TO COCKPIT AND STAB MOTOR NTF. A1 AND A2 TERMINALS BURNED. REPLACED RELAY R20-16, ALSO REPLACED C1213A8 AND C1202B8 WIRES. RE-TERMINATED C1202A8, SYS CHECKS GOOD.