Key safety system off in Army helicopter that collided with American Airlines jet, senator says

By David Shepardson

WASHINGTON (Reuters) -A key safety system was turned off on a U.S. Army helicopter that collided with an American Airlines regional jet last week near Washington Reagan Airport, killing 67.

Senate Commerce Committee chair Ted Cruz told reporters the Black Hawk helicopter had turned off its automatic dependent surveillance-broadcast (ADS-B), which is permitted for military aircraft.

"This was a training mission, so there was no compelling national security reason for ADS-B to be turned off," Cruz said after a briefing from the National Transportation Safety Board and Federal Aviation Administration.

In the deadliest U.S. air disaster in more than 20 years, the aircraft collided last week, with both aircraft plunging into the Potomac River. The helicopter was flying about 100 feet over the maximum allowed for that route, the NTSB said earlier.

ADS-B is an advanced surveillance technology to track aircraft location. Cruz noted the helicopter had a transponder so it would appear on radar but ADS-B is significantly more accurate.

Last week, Senator Maria Cantwell, the top Democrat on the committee, questioned why the FAA since 2018 has allowed military flights to fly with their installed ADS-B equipment off.

Cruz also said he had asked the FAA to conduct a review of helicopter routes near other congested airports.

In the aftermath of the crash, the FAA has imposed significant restrictions on helicopter flights around Reagan National until at least late February and two of the lesser-used runways remain closed. When police, medical or presidential transportation helicopters must use the airspace, civilian planes are not allowed to be in the same area, according to an FAA advisory.

U.S. Transportation Secretary Sean Duffy also questioned some nonessential military helicopter trips. "If we have generals who are flying in helicopters for convenience through this airspace, that's not acceptable. Get a damn Suburban and drive - you don't need to take a helicopter," Duffy said.

(Reporting by David Shepardson; Editing by Chris Reese and Nick Zieminski)