WASHINGTON (AP) — It’s not clear why a plane was allowed to take off as President Donald Trump’s helicopter was approaching Ronald Reagan Washington National Airport on Tuesday afternoon in an apparent violation of safety procedures put in place after last year’s midair collision near the busy airport.

Both the National Transportation Safety Board and the Federal Aviation Administration said Wednesday they were investigating what happened when a commercial jet took off just as Marine One left the White House for Andrews Air Force Base with the president aboard for the first leg of a West Coast trip.

The FAA decided after 67 people died on Jan. 29, 2025, when an airliner collided with an Army Black Hawk helicopter that all takeoffs and landings at the Washington, D.C., airport would be halted anytime a helicopter passes by on a conflicting route. The airspace near the White House and Reagan is heavily congested with military and commercial aircraft.

The airplane that took off Tuesday was climbing above Marine One as the helicopter approached, so the two aircraft were not on a collision course.

The FAA said in a statement that a preliminary investigation showed “there was a momentary loss of separation after which the aircraft continued to move away from one another.”

“The air traffic controller was in contact with both the commercial pilot and Marine One pilot during the loss of separation,” the FAA said.

The White House emphasized that Trump was never in danger.

“Marine One flights are piloted by some of the best aviators in the world, and at no point was the President in harm’s way,” White House spokesperson Kush Desai said in a statement.

The Marine Corps defended the actions of their helicopter pilots.

“There were no ‘close calls’ with the routine Marine One movement,” Marine Corps spokesperson Capt. Jacob Sugg said in an email. “Washington National Tower did not delay the helicopter crew, ask them to hold, or otherwise alter their flight profile.”

Tower audio appears to show confusion over Marine One’s plan

Audio recorded by Air Traffic Control shows the Marine One pilot calling the tower ahead of time: “Tower, just want to make sure you copy. Marine One, three minutes to lift.”