What was found
AFTER TAKEOFF, CABIN BEGAN TO FILL WITH SMOKE, PILOT BEGAN DUMPING FUEL AND RETURNED TO DEPARTURE AIRPORT. AIRCRAFT LANDED, TAXIED TO GATE AND DEPLANED PASSENGERS THROUGH JETWAY WITHOUT FURTHER INCIDENT. MAINTENANCE INSTALLED NEW COALESCER BAGS AND RAN AIRCRAFT ENGINES, PACKS ON. NO SMOKE OR FUMES NOTED.