N835DH squawked 7700 near Boston (BOS)

At 23:15 UTC on 4 November 2026, N835DH, an Airbus Helicopters EC-135, began transmitting transponder code 7700, general emergency, near Boston (BOS) at 700 ft.

The code stayed up for about 0 minutes; we last saw it at 23:15 UTC, by which time the aircraft was at 1,100 ft. The map shows the path flown around the event, colored from live ADS-B positions.

A squawk code is set by the crew on the transponder. 7700 is the general emergency code: it covers anything from a medical issue on board to a technical fault, and most 7700s end in a normal landing. Nothing here is confirmed by the operator or an investigating authority; it is what the aircraft broadcast.