According to her spokeswoman Stephanie Grisham, the US First Lady was on her way from Washington to Philadelphia when there was “a minor mechanical issue.”
Stephanie Grisham added: “everything is fine and everyone is safe.”
The airplane returned to Joint Base Andrews, an air force facility used by the White House outside Washington, DC.
CNN and other US networks said that reporters aboard the plane noticed smoke in the cabin and were told to hold wet towels over their faces if it got worse.
The smoke dissipated and the aircraft returned without further incident.
Mrs. Trump was on her way to visit a Philadelphia hospital specializing in the treatment of mothers with opioid use disorders and babies born with addictions to drugs they were exposed to while still in the womb.
Source: AFP.