As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HSI CIRCUIT BREAKER TRIPPED AND SMOKE CAME FROM BACK OF CAPTAIN'S INSTRUMENT PANEL. CHECKED WIRING AT P1-1, P1 -3 AND P11 C-B PANEL. CHECKED OK. FOUND CAPTAIN`S EHSI HAD BURNING ODOR. ALSO FOUND CAPTAIN`S AND FIRST OFFICER`S EHSI HAD MR41814 INSTALLED. REPLACED LT AND RT EHSI N5 AND N45 REF MM 34-22-04, 34-22-04 AND 31-11- 11-011, CHECKED OK.