What was found
EWR - FLT 521 - EN ROUTE EWR-ORD, SHORTLY AFTER TAKEOFF DETECTED SMOKE IN CABIN. DECLARED EMERGENCY, RETURNED EWR AND LANDED WITHOUT FURTHER INCIDENT. REPLACED APU. SYSTEM IS UNDER INVESTIGATION. (M)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EWR - FLT 521 - EN ROUTE EWR-ORD, SHORTLY AFTER TAKEOFF DETECTED SMOKE IN CABIN. DECLARED EMERGENCY, RETURNED EWR AND LANDED WITHOUT FURTHER INCIDENT. REPLACED APU. SYSTEM IS UNDER INVESTIGATION. (M)