Donald Trump’s aircraft fleet has attracted the media spotlight after the discovery that the registration for the business mogul and Republican Presidential candidate's Cessna Citation X (N725DT) expired in January. According to FAA records, the 1997 Model 750 was last registered on Jan. 17, 2013. Under FAA rules that took effect in 2010, aircraft must be re-registered every three years, so N725DT’s registration expired at the end of January. Trump’s Boeing 757-200 (N757AF) and two Sikorsky S-76Bs (N76DT and N7P), are still actively registered. A Trump spokesperson said the Citation is in the process of being re-registered, according to news outlets.

The FAA updated its registration rules in 2010, fearing that records on as many as one-third of the fleet of 357,000 aircraft could be inaccurate. The FAA cited failures in the previous registration system, which had no expiration dates, as it moved to the system of mandatory expirations if the aircraft are not re-registered. Under the previous system owners were required to report any changes in registration to the FAA.

Failure to comply with the new registration requirements could lead to fines, penalties, violation of insurance coverage terms, violations of loan/lease terms and loss of N-numbers, among other potential ramifications. Trump has been regularly flying on N725DT in pursuit of the Republican Presidential nomination, though it's unknown what actions, if any, that the FAA will take.

AIN sister publication Business Jet Traveler interviewed Trump in 2011 about the 757 that he bought from Microsoft founder Paul Allen and his ambitions to run for President.