A plane heading for Los Angeles was forced to return to Atlanta because of an air duct problem, officials said.
Delta Air Lines spokeswoman Kristin Baur said Flight 125 had to turn back about an hour and a half after taking off from Hartsfield-Jackson International Airport.
FAA spokeswoman Kathleen Bergen said that, as the Boeing 767 landed, the aircraft's tail scraped the runway.
But she said no debris was found on the tarmac and the plane taxied to to the gate without assistance.
Ms Baur said the 262 passengers on board changed to another plane to resume their journey.
Earlier, a plane flying from New York to Moscow returned to John F Kennedy International Airport for an emergency landing after suffering an engine problem.
Federal Aviation Administration spokeswoman Holly Baker said Delta Flight 30 landed safely and taxied to the gate. There were no injuries.
She said the passenger jet had taken off from JFK airport and was en route to the Russian capital when it reported engine problems and turned back. She did not know what time it took off.
She added that earlier reports of a fire on one of the plane's wings were incorrect.
The New York Fire Department said about 200 passengers were on board the plane.