William Cummings

USA TODAY

There are a lot of perks to owning a fleet of private aircraft. The downside: all that pesky paperwork.

The registration for one of the private jets Donald Trump has been using to travel the country during his presidential campaign expired at the end of January.

Federal Aviation Administration inspectors have contacted Trump's chief pilot about the registration and Trump agreed to ground the plane until the matter is sorted out, FAA spokeswoman Laura Brown told USA TODAY in an email.

The penalties for flying an unregistered plane can include a civil penalty of up to $27,500, a criminal fine of up to $250,000 and three years in prison, although it is unlikely the FAA would impose the maximum punishment, according to The New York Times.

The plane in question is not the large Boeing 757 emblazoned with the Trump name on its side — which Marco Rubio mockingly called "Hair Force One" — but a smaller Cessna Citation X.

Getting the registration sorted out with the FAA could take months, The Times reported.

Registration woes aside, don't expect Trump to plop down next to you in economy class anytime soon. He can still hop on the 757, one of his helicopters or charter a flight.