President Barack Obama switched planes in Philadelphia for his return trip to Washington because of a mechanical problem with a flap in his earlier aircraft, the White House said.
He had flown on a US government C-32 plane, smaller than the 747 jet he typically flies in. Any aircraft the president is used is identified as Air Force One. After discovering the mechanical problem, Obama and other travelers with him switched to a backup C-32.
"While in Philadelphia, we have transferred to a backup airplane due to a minor mechanical problem with one of the aircraft's flaps," wrote White House Press Secretary Eric Schultz in a released statement. "This switch to a backup C-32 will not affect our schedule."
The White House described the problem as minor.
Obama on Sunday traveled to Connecticut and Pennsylvania to campaign for Democrats in gubernatorial races.