As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL SMELL IN MID CABIN AREA EN ROUTE ATL. CREW SECURED UTILITY BUSSES AND PERFORMED CHECKLIST. MAINTENANCE WAS UNABLE TO DUPLICATE OR DETERMINE SOURCE. CEILING PANELS OPENED AND ALL EQUIPMENT WAS POWERED. A/C WAS RELEASED FOR SERVICE.