As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUMES IN COCKPIT DURING DESCENT. SMELLED LIKE ELECTRICAL FIRE. TRACED FUMES TO A FAULTY LEFT TURNOFF LIGHT SWITCH. REMOVED AND REPLACED PANEL ASSEMBLY AND TESTED IAW AMM 33-42-00-715-030. ALL OPS NOW NORMAL. R & R OF LIGHT ASSEMBLY PANEL.