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Fatal air collision in Washington | Tens of meters apart between the altimeters of the helicopter

manhattantribune.com by manhattantribune.com
1 August 2025
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Fatal air collision in Washington | Tens of meters apart between the altimeters of the helicopter
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(New York) The investigation into the deadly collision at the end of January in Washington between an airliner and an American army helicopter highlighted several tens of meters in the altitude displayed by the instruments of the military apparatus, according to hearings carried out in Washington.


Posted at 6:40 p.m.

The American Transport Safety Agency (NTSB) held investigative hearings on Wednesday to Friday, with advanced interrogations of experts and representatives of the various parties (companies, regulator, air controllers, etc.) concerned by this accident.

The collision, which killed 67 people in total, occurred on January 29 near Ronald-Reagan airport in the American capital between a military helicopter Sikorsky Black Hawk-who was carrying out a training flight-and a CRJ700 bomber operated by a subsidiary of the American Airlines.

As of February 14, relying on the data of the flight recorders, the NTSB had reported an “divergence” concerning the altitude of the helicopter.

Jennifer Homendy, agency director, said that, shortly before the collision, the helicopter pilot had reported an altitude of 300 feet while her pilot-instructor indicated 400 feet.

“None of the pilots made a comment on the divergence of altitude,” she noted. “At this point, we do not know why there was a divergence between the two. »»

“At the time of the collision, the Black Hawk was at 278 feet. But I want to warn that this does not mean that (…) This is what the Black Hawk crew saw on the barometric altimeters in the cockpit, “she said, evoking” conflicting information in the data “.

As part of the investigation, the hearings this week revealed, tests were carried out with three copies of the same Sikorsky Black Hawk Lima model, belonging to the same battalion.

They highlighted differences between the altitude indicated by the altimeter by radar and the barometric altimeter, installed on this device.

In an “controlled environment, the gap was within the tolerated limit of 20 to 55 feet (but), once the Rotors were running and produced an elevation and a push, the indications of the altimeter (barometric) fell significantly and remained it throughout the flight time”, explained Marie Moler, one of the investigators, specifying that a “difference of 80 to 130 feet” meters, had been noted.

It is a “very important” gap in this case, insisted Jennifer Homendy with journalists.

Indeed, in the section where the collision occurred, helicopters had to fly at 200 feet above sea level.

Tags: airaltimetersCollisionFatalhelicoptermeterstensWashington
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