What was found
DURING PREFLIGHT CHECK DISCOVERED TRACK LIGHTING-3EA LITE FROM FRONT TOP COVER MISSING. (BASED ON THE CORRECTIVE ACTION, THIS WRITE-UP WAS TAKEN TO MEAN 3 EA EMERGENCY TRACK (AISLE) LIGHTS WERE MISSING.) AT EACH LOCATION, REPLACED LENS AND LAMP, BOTH SUB-ASSEMBLIES TO THE LIGHT MODULE. LIGHTS THEN OPERATED PROPERLY.