What was found
FLT 7676 - SLC TO SLC - FLIGHT CREW REPORTED SMOKE IN THE CABIN AFTER T/O AND OVER WEIGHT LANDING. CONTRACT MX INSPECTED AIRCRAFT, RAN ENGINES, APU, BLEED SYSTEM AND COULD NOT DUPLICATE; HARD LANDING WAS FOUND WITHIN LIMITS. AIRCRAFT RETURNED TO THE GATE TO REMOVED ICE FROM ENGINE, OPERATIONALLY CHECKED ALL SYSTEM SATISFACTORY. AIRCRAFT WAS RELEASED TO RETURN FOR SERVICE.