As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE FROM UNKNOWN ORIGIN ON FO SIDE COCKPIT. FOUND BALLAST OVERHEATED. DEFERRED THIS ITEM IAW EWA MEL 33-1 CAT 'C' DMI NR 806173 PLACARD INSTALLED. REMOVED AND REPLACED FLOURESCENT LIGHT BALLAST ASSY, LIGHTS OPS CK GOOD, THIS CLEARS DMI 806173 PLACARD REMOVED.