What was found
BZN - ON FLIGHT 2384, FLIGHT ATTENDANT REPORTED A HOT ELECTRICAL SMELL IN THE AREA OF THE PASSENGER SERVICE UNIT IN ROW 11 A/B. SIDEWALL LIGHTS TURNED OFF, AND SMELL AND HEAT DECREASED. PASSENGER SERVICE UNIT WAS ALSO HOT TO THE TOUCH. MAINTENANCE DEFERRED THE SYSTEM. MAINTENANCE RAN THE SIDEWALL LIGHTS FOR 7 HOURS, DROPPED THE PSU'S IN ROWS 10-12. ALL CHECKS NORMAL. NO SMELLS NOTED. AIRCRAFT RETURNED TO SERVICE, NO PARTS REPLACED.