As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL COMING FROM ROW 30DEF, FLIGHT ATTENDANT'S TURNED OFF LIGHTS & SMELL WENT AWAY. FOUND LOWER SIDEWALL BALLAST HOLDER AT 30DEF RESTING ON PANEL. SECURED & LOCKED BALLAST HOLDER TO RAIL. OPERATIONS CHECKED OK IAW AMM 33-21-03.