What was found
(CAN) SHORTLY AFTER DEPARTURE, A PASSENGER NOTED SMELL OF SMOKE. SMOKE SEEN BY CABIN ATTENDANT COMING FROM AROUND PASSENGER SERVICE UNIT. EMERGENCY DECLARED AND AIRCRAFT LANDED OK. FIRE CREWS MET AIRCRAFT AND IDENTIFIED SMOKE AS COMING FROM SIDEWALL LIGHTING IMMEDIATELY ABOVE THE RIGHT HAND PASSENGER DOOR. NO EXTINGUISHER REQUIRED. INSPECTION FOUND ONE WIRE BURNED AT LIGHTING FIXTURE.