What was found
ON FLIGHT 3305 THE CREW REPORTED THE SIDE LIGHTING IN CABIN, RIGHT SIDE FROM 5TH ROW THRU 12 ROW AND 15 ROW THRU 18, AND LEFT SIDE FROM ROW 9 THRU 11 AND 15 THRU 18 STOPPED WORKING; ACRID SMELL ACCOMPANIED. THE AIRCRAFT WAS REMOVED FROM SERVICE. INSPECTED SIDE PANEL LIGHTS, INVERTER, BALLAST; NO DAMAGE FOUND. RESET AIRCRAFT ELECTRCAL POWER. ALL LIGHTS OPERATING NORMALLY. THE AIRCRAFT WAS RETURNED TO SERVICE.