Federal transportation safety officials were investigating on Friday after two commercial flights aborted landings because an Army helicopter had entered the airspace around Ronald Reagan Washington National Airport, where helicopter traffic has been restricted since a fatal collision in January.
Air traffic controllers instructed Delta Air Lines Flight 1671 and Republic Airways Flight 5825 to abort their landings around 2:30 p.m. Thursday because of the helicopter’s presence, according to the Federal Aviation Administration, which has begun an investigation along with the National Transportation Safety Board.
The helicopter was a Black Hawk headed to the nearby Pentagon, the safety board said.
Both planes later landed safely, but the episode prompted outrage among officials in Washington.
“Our helicopter restrictions around DCA are crystal clear,” Transportation Secretary Sean Duffy said in a social media post, using the airport’s code. He said he would speak to the Defense Department about “why the hell our rules were disregarded.”
The Army did not immediately issue a statement on the incident.
The F.A.A. had restricted nonessential helicopter traffic around the airport, which is just miles from the Capitol and the White House, after a Jan. 29 midair collision between an American Airlines flight and Army Black Hawk helicopter killed 67 people.
The episode on Thursday also renewed concerns by lawmakers, many of whom use the airport.
Senator Ted Cruz, the Texas Republican who leads the Senate’s committee that handles transportation, said the incident underscored continuing risks posed by military flights near the airport and called for legislation to improve civilian air safety.
“Just days after military flights resumed in the National Capital Region, the Army is once again putting the traveling public at risk,” Mr. Cruz said on social media. “Thank God there was a decisive response from air traffic controllers and pilots, or else these two close calls could have resulted in the loss of hundreds of lives.”
Senator Maria Cantwell of Washington, the committee’s top Democrat, criticized the military flight’s proximity to commercial traffic.
She called it “far past time” for Defense Secretary Pete Hegseth and the F.A.A. “to give our airspace the security and safety attention it deserves.”
Mark Walker is an investigative reporter focused on transportation. He is based in Washington.
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