According to the FAA's preliminary findings, the commercial aircraft took off while Marine One was approaching the airport. Washington: US aviation authorities have launched an investigation after a commercial passenger jet departed Ronald Reagan Washington National Airport while President Donald Trump's helicopter, Marine One, was approaching the airport, raising questions over compliance with safety procedures introduced after last year's fatal midair collision. According to the FAA's preliminary findings, the commercial aircraft took off while Marine One was approaching the airport. “There were no ‘close calls’ with the routine Marine One movement,” Marine Corps spokesperson Capt. The incident has renewed scrutiny of operations around Reagan National Airport, one of the busiest and most complex airspaces in the United States due to the close proximity of commercial, military and government aircraft.