What was found
AIRCRAFT HAD UNSCHEDULED LANDING INTO KCVG FOR HAZE IN CABIN FOLLOWED BY LAV SMOKE ON EICAS. PERFORMED INSPECTIONS OF LAV LIGHTS, WIRES AND BALLAST, NO DEFECTS FOUND AND OPS CHECK GOOD. PERFORMED INSPECTIONS OF ALL CABIN LIGHT BALLAST AND WIRING, NO DEFECTS NOTED AND OPS CHECK GOOD. MAINTENANCE FOUND LEFT RAM AIR INTAKE EROSION TAPE MISSING AND PLACED ON DEFERRAL. PACK 1 ACM AND HEAT EXCHANGER REQUIRE FURTHER INSPECTION AND DEFERRED PACK 1 SYSTEM. A/C REPOSITIONED TO KSTL. MAINTENANCE INSPECTED AND FOUND NR 1 ENGINE CARBON SEAL LEAKING OIL AND CAUSING SMOKE/HAZE AND SMELL. MAINTENANCE REPLACED THE NR 1 ENGINGE CARBON SEAL, OPS CHECK GOOD. MAINTENANCE ALSO REPLACED THE NR 1 HEAT EXCHANGER AND LEFT RAM AIR EROSION TAPE.