SOUTHWEST PHILADELPHIA (WPVI) -- Officials say an American Airlines flight has landed safely at Philadelphia International Airport after crews declared an emergency.Federal Aviation Administration spokesman Jim Peters says no injuries were reported.He says Flight 669 left for Seattle Tacoma International Airport on Friday night when the crew declared an emergency shortly after taking off.He says the Airbus A320 landed safely about 9:20 p.m. Friday.American Airlines spokesman Josh Freed says apparently some residual fuel burned off as the plane took off about 9 p.m.He says that is not uncommon and stressed that "no part of the airplane was ever on fire" and the engine never lost power.Freed says passengers were put on another flight. The plane was carrying 133 passengers and five crew members.