What was found
CABIN EMERG LIGHT: CIRCUIT BREAKER HT 043 POPPED ON THE AFT CIRCUIT BREAKER PANEL IN THE APU COMPARTMENT. WE EXPERIENCED HEAVY ELECTRICAL SMELL AND SMOKE IN THE CABIN IN FLIGHT . THE SMOKE DISSIPATED AFTER ABOUT 10 MINUTES. FOUND SEVERAL DROP AISLE LIGHTS ON LEFT SIDE OF AIRCRAFT HAD SHORTED AND MELTED. FOUND 2 MORE THAT WERE DAMAGED. REPLACED THE 5 FORWARD DROP AISLE LIGHTS ON THE LEFT SIDE OF THE CABIN. CABIN DROP AISLE LIGHTS OPS CHECKS GOOD. REF. CE-560XL AMM 33-20-04. THE EMERGENCY LIGHTS OPS CHECK GOOD. REF. CE-560XL AMM 33-50-00.