The Trump administration officially accepted Boeing The Pentagon said Wednesday that the Qatar government gave the 747 jet to the United States.

Pentagon spokesman Sean Parnell said in a statement to CNBC that Defense Secretary Pete Hegseth accepted luxury aircraft “under all federal regulations.”

Parnell said the Department of Defense will work to ensure that President Donald Trump wants the aircraft used as the New Air Force One to fulfill "proper safety measures and functional error requirements."

Despite expert warnings and Democrats’ allegations of bribery, the announcement cemented the U.S. government’s intention to fly.

At the White House Wednesday, Trump called the gift “a great thing” and said Qatar handed over the plane “so they can help us.”

Boeing has spent years turning two 747 people into the next Air Force during Trump's first term as president. But the project lags behind plans, and the plane may not be ready until Trump’s second term ends.

Trump administration officials said earlier this year that the president was frustrated by the pace and the consideration of alternatives. "Unfortunately, Boeing is a little late," Trump said Wednesday.

However, it is not clear that the 13-year-old Katari jet is worth $400 million and could really provide a quick solution.

Experts say converting jets into air force could cost taxpayers more than $1 billion and take years to complete.

The gift from Qatar has also sparked anger from Democrats and other critics, some of whom condemned the exchange as a valid bribe by the U.S. president. Even some Republicans have raised concerns about potential national security risks and other issues surrounding gifts.

"The deal has filled me with political espionage, moral and constitutional issues," R-Maine Senator Susan Collins said last week.

But Trump repeatedly defended accepting the donation, saying it would not accept free jets and insisted on "not treating me" to the U.S. government, which was "stupid".

Boeing CEO Kelly Ortberg told analysts about his company’s latest quarterly earnings call: “We will continue to work with customers to modify the plan plan to allow for earlier first delivery while maintaining our focus on safety and quality.”

- CNBC's Leslie Josephs contributed to the report.