(AP) - Two flights departing Newark Liberty International Airport over the weekend had to return after reported emergencies. The Federal Aviation Administration says United Flight 409 bound for Seattle returned to the airport at about 9:15 a.m. Sunday after reports of possible smoke in the cabin and cockpit. No injuries were reported. The emergency landing was the second in as many days at Newark. On Saturday night, a United flight bound for Germany had to return to the airport after experiencing engine problems. On Sunday, the FAA said one of the engines on the Berlin-bound flight apparently overheated on takeoff. An agency spokesman says that contrary to published reports, the aircraft didn't blow a tire during takeoff.Officials: United Airlines plane lands safely after fire