The Potomac River midair collision near Washington National

In this article · 4 sections

1. What happened
2. What the investigation found
3. How rare is this?
4. What changed

What happened

At about 8:48 p.m. on January 29, 2025, a regional jet operating as American Airlines flight 5342 was on approach to Runway 33 at Ronald Reagan Washington National Airport (DCA). A US Army Black Hawk helicopter (callsign PAT25) was flying a charted helicopter route along the Potomac River. The two collided about half a mile southeast of the airport. All 64 people on the airplane and all 3 soldiers on the helicopter died.^{1, 2} The NTSB described it as the nation's deadliest aviation accident since November 2001.²

What the investigation found

The NTSB concluded that "deep, underlying systemic failures" lined up — not a single mistake.² Its probable cause included:¹

• The FAA placed a helicopter route (Route 4) close beneath a runway approach path without procedures to keep helicopters and airplanes apart, didn't regularly review that route, and didn't act on data and recommendations that showed the risk.
• The system relied heavily on pilots spotting each other visually ("see and avoid") to keep traffic flowing, without enough regard for how hard that is at night in busy airspace.
• The helicopter crew did not maintain visual separation, and — partly because of barometric altimeter error tolerances the Army hadn't made pilots aware of — flew above the route's maximum altitude.
• A busy tower, with helicopter and airplane control positions combined, lost situational awareness and did not issue safety alerts to either crew.

Contributing factors included limits of the collision-warning systems on both aircraft and an airport arrival rate and traffic mix that strained controllers over time.¹

How rare is this?

Midair collisions involving airliners are exceptionally rare. In IATA's worldwide figures for 2025, this was the year's only midair collision among roughly 38.7 million flights, and it and one other accident accounted for most of the year's onboard fatalities.⁶ NTSB Chair Jennifer Homendy noted that before this accident, the US was experiencing a record level of aviation safety.⁷

What changed

• In March 2025, the NTSB issued urgent recommendations on helicopter traffic near DCA.⁴
• Days later, the FAA permanently closed Route 4 between Hains Point and the Wilson Bridge, permanently restricted non-essential helicopter flights around DCA, and eliminated mixed helicopter/airplane traffic there. Urgent missions (such as medical flights) must keep specific distances from airplanes, and certain runway combinations can't be used while they're nearby.⁵
• The FAA said it was reviewing the other cities with charted helicopter routes — Boston, New York, Baltimore–Washington, Detroit, Chicago, Dallas, Houston and Los Angeles — for similar risks.⁵
• The NTSB's final report adds further recommendations to the FAA and the Army on airspace design, collision-alerting technology and safety management.³

Sources

(7)

1. NTSB investigation page, DCA25MA108
2. NTSB press release, "Systemic Failures Led to Midair Collision Over Potomac River" (Jan 2026)
3. NTSB Aircraft Accident Report AIR-26-02 (PDF)
4. NTSB urgent recommendations, 11 March 2025
5. FAA statement on NTSB recommendations for DCA (14 Mar 2025)
6. IATA 2025 Safety Report press release
7. NTSB Chair Homendy, opening remarks at the board meeting (27 Jan 2026)

Facts last checked against these sources: October 17, 2026.