As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPROACH INTO STL (APPROX 1000') FA'S CALLED, INFORMING CAPT OF ELECTRICAL SMELL. PILOT'S BEGAN SMELLING FAINT ELECTRICAL SMELL AT THAT TIME. NO LIGHTS OF INSTRUMENT FAILURES NOTED NOR POPPED CB'S. REMOVED AND REPLACED GASPER FAN PER MM.