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Toronto Terminal Control Unit using NORTH-DEPARTURE freq 127.575


I am normally used to hearing YYZ Terminal Departures on the South frequency (128.8), but I was archiving a few audio clips from a incident that occured on February 3rd 2024 at approximately 1152 UTC, and after the incident aircraft (EDV4826, a CRJ) reported an electrical fire and started descending, the controller gave handoffs to the north frequency, which I've never heard them using as far as I've heard.

I find it quite interesting, let me know what you guys think.

127.57 is used during busy periods especially summer afternoons and evening if enough staffing in the tower permits simultaneous departures from both the north and south parallels then the terminal opens a second departure freq. hence 128.8 caters to the 6-24s and 127.57 handles 5-23 departures, very similar when 124.47 opens up if there are a lot of inbounds at the same time. However with regards to your question if an actual fire emergency has been confirmed by the crew and 132.8 was already handling a slew of arrivals they could have made a quick decision to give EDV4826 an unused frequency to quickly get them back without interruptions from any other aircraft communications.  It's as simple as turning on a toggle switch to begin communicating with the aircraft in distress.

That makes a lot of sense, thank you very much for the reply.


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