ACA138 squawked 7700 near Calgary (YYC)

At 17:05 UTC on 28 October 2026, ACA138, an Airbus A321 registered C-GITY operated by Air Canada, began transmitting transponder code 7700, general emergency, near Calgary (YYC) at 3,700 ft.

The code stayed up for about 45 minutes; we last saw it at 17:50 UTC, by which time the aircraft was at 3,900 ft. The map shows the path flown around the event, coloured 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.