Key Insights from the NTSB Inquiry into the DCA Midair Crash

This week's NTSB hearings have unveiled new details surrounding the catastrophic midair collision last January involving an American Airlines jet and an Army helicopter near Washington D.C.

The crash claimed the lives of all 67 individuals aboard both aircraft, marking the most disastrous aviation incident in the United States in several decades.

Here's an overview of the crucial findings discussed during the hearings.

Inaccuracy Issues with Army Helicopter's Altimeter

On the evening of January 29, a Black Hawk helicopter crewed by three individuals navigated close to Ronald Reagan Washington National Airport, heading south along the Potomac River. Concurrently, a PSA Airlines flight departed from Wichita, Kansas, carrying two pilots, two flight attendants, and 60 passengers, was set to land at the airport.

The two aircraft collided at an altitude of approximately 278 feet, despite the helicopter being restricted to 200 feet at that segment of its route. Jennifer Homendy, Chair of the NTSB, indicated that the helicopter pilots might have been unaware of their true altitude, as their altimeter might have displayed incorrect data.

It's not uncommon, Army officials noted, for there to be significant discrepancies in altimeter readings.

Chief Warrant Officer Kylene Lewis of the U.S. Army commented that an 80-foot variance between radar and barometric altitudes wouldn’t typically raise alarm.

Radar altimeters gauge the vertical distance from the ground, while barometric altimeters rely on air pressure for altitude estimation.

In questioning, NTSB member J. Todd Inman sought explanations from Army and Sikorsky representatives about the altimeter's precision, especially given their proximity to commercial flights.

The Army is contemplating updates to their manuals to inform pilots about potential altitude reading errors.

Pressure on DCA Air Traffic Controllers

The Ronald Reagan National Airport, known for its complex and busy nature, places significant demands on controllers to maintain operational efficiency, including utilizing additional runways during high traffic times, such as the night of the crash.

When questioned about whether such pressures might compromise safety, Clark Allen, a former DCA tower operations manager, admitted they were operating close to the limits.

Tower operations at DCA generally have separate controllers for helicopter and fixed-wing aircraft, though on the accident night, one controller managed both duties – a practice not uncommon at the airport.

Unaddressed FAA Staff Warnings

Prior to the accident, FAA personnel expressed concerns about the helicopter route's close proximity to commercial pathways. The 12th Aviation Battalion's training in these areas, tied to governmental transport, raised security obstacles to route adjustments.

Clark Allen noted that proposed changes to Route 4 faced rejection, essential for continuity of governmental operations.

NTSB Chairwoman Homendy criticized the FAA for ignoring safety warnings, stating the catastrophic outcome was unacceptable.

Transportation Secretary Sean Duffy, following NTSB suggestions, has since restricted non-critical helicopter flights near DCA and eliminated shared airspaces with fixed-wing aircraft.