What was found
DURING APPROACH INTO CVG, A STRONG SMELL OF ELECTRICAL ODOR WAS NOTED IN THE COCKPIT AND CABIN ASSOCIATED WITH SMOKE. THE CREW DECLARED AN EMERGENCY. AIRCRAFT LANDED SAFELY. INVESTIGATION REVEALED THE LEFT AIR CONDITIONING UNIT FAILED CAUSING SLIGHT SMOKE AND FOUL ODOR. THE LEFT ACM WAS DEFERRED AND AIRCRAFT RETURNED TO SERVICE.