The program allows aircraft owners to apply for a temporary aircraft registration number that is not currently attached to any other plane — meaning that celebrities like Musk can essentially fly anonymously.
The PIA program allows aircraft owners to switch out their registration number every 60 days.
The incognito registration number also doesn't prevent Sweeney from tracking the private jet via ADS-B Exchange, a public flight-tracking database.
Elon Musk's private jet flight with PIA flag, tracked by Jack Sweeney.
Jack Sweeney via ADS-B ExchangeMusk is also on the FAA's free "Limiting Aircraft Data Displayed" program, or LADD list.