Loss of Separation Event between Marine One and Commercial Airliner
This information is preliminary and subject to change.
Updated 27 August 2026
Read the Investigation Preliminary Report
On August 4, 2026, about 1434 eastern daylight time (EDT), Marine One (VM1) a Sikorsky VH3D, and Envoy Air flight 3742 (ENY3742), an Embraer E-170, were involved in a loss of separation about 2 miles north of Ronald Regan Washington National Airport (DCA), Arlington, Virginia. There were no injuries reported to the passengers or crewmembers on board either aircraft.
VM1 was a military Presidential transport local flight operating under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91 from The Ellipse Park, Washington, D.C. ENY3742 was a scheduled domestic passenger flight operating under the provisions of Title 14 CFR Part 121 from DCA to Pensacola International Airport (PNS), Pensacola, Florida. At the time of the loss of separation, VM1 had departed The Ellipse when ENY3742 was departing runway 1 and beginning their initial climb. After the loss of separation, VM1 completed their local flight without incident while ENY3742 completed their flight to PNS without incident.
Parties to the investigation include:
- the Federal Aviation Administration (FAA),
- Department of the Navy (DON), and
- Envoy Air Inc.
In accordance with the International Civil Aviation Organization (ICAO) Annex 13, Centro de Investigação e Prevenção de Acidentes Aeronáuticos (CENIPA) of Brazil, representing the State of Design of the Embraer 170 airplane, was notified of the investigation.
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