President Donald Trump said a luxury jet being offered by the government of Qatar would be used as a temporary Air Force One, indicating an intention to accept a gift that has sparked ethical and security concerns in Washington.

The Trump administration plans to accept a luxury Boeing 747-8 plane as a donation from the Qatari royal family that will be upgraded to serve as Air Force One, which would make it one of the biggest foreign gifts ever received by the U.S. government, several American officials with knowledge of the matter said.

Boeing has not officially confirmed any changes to the $3.9 billion fixed-price contract it signed during Trump’s first term. It has absorbed more than $2.5 billion in losses on the project.