New Air Force One jet to be 'maxed out,' Trump says, after security concerns raised

The new Air Force One will be "maxed out" with security features, undergoing an upgrade that's expected to put the Qatari-gifted jet out of commission for about a month, President Donald Trump said on Sunday.

"Well, it has, it has a lot, and you know it has a lot of capability, but as I understand it, in about a month or so, they're going to send it to have it be maxed out," the president said of the newly retrofitted jet. "So they're going to be sending it, and they'll have it be maxed out."

The jet had faced security concerns in the weeks since itsfirst operational flighton July 1, when Trump flew on it to North Dakota. The plane, a Boeing 747-8 that was gifted from Qatar, later carried Trump to the NATO summit in Turkey this month.

As Trump prepared to depart the summit, the Secret Service urged the president to take the older Air Force One jet as a precaution, due in part for the differences in security capabilities,ABC News learned at the time.

The New York Timesreportedthat the new jet did not have the same anti-missile capabilities as the previous model. Trump's comment on Sunday followed a reporter's question about those claims, which ABC News has not independently confirmed.

"Mr. President, this plane does not have antimissile defense systems on it," the reporter asked. "Why are you flying on it?"

Trump in response said the plane would be "maxed out," a process that he expected would "take about a month." The president did not detail exactly when the upgrades were expected to begin.

The Qatari royal family's donation of the luxury jet valued at approximately $400 million, an unprecedented foreign gift, raised questions from some lawmakers and ethics experts. Ahead of his first flight, Trump gave credit to the Qatari government.

"Frankly, we couldn't build a plane like this because we wouldn't be willing to spend the kind of money necessary," he said on July 1. "They spent top dollar."

"I said to Boeing, 'What's the best one?' They said this is the best plane ever built, and you're going to have the privilege of flying it, and I have a privilege also of flying it," Trump said that day.

The U.S. Air Force said it had been modifying the jet Texas since September to meet the security, communications and other needs to transport the president.

The Air Force last year originally estimated it would cost less than $400 million to retrofit the gift, though it's unclear how much exactly has been spent so far. Many of the details of the retrofitting on the new plane are considered classified.

The gifted plane is expected to be used as the new Air Force One until shortly before Trump leaves office, at which time ownership of the plane will be transferred to the Donald J. Trump Presidential Library Foundation, sources familiar with the proposed arrangement have toldABC News.

ABC News'Emily Chang, Sarah Kolinovsky and Michelle Stoddart contributed to this report.