Originally Posted by
Onceapilot
There is more logic to flightcrew going 100% Oxy. Some incapacitating conditions, fumes or toxic gases might be undetected by the flightcrew until damaging or debilitating effects are experienced. Therefore, generally if there are any signs of such conditions on the aeroplane, the flightcrew will go 100% Oxy.
Agreed.
Whatever the case, it sounds to me like the BA 286 flight deck crew did not put on their masks while talking with Edmonton Center.
The PAN PAN PAN check in shows up at about 43:50 on this clip when I open it in a Windows 10 Edge browser:
http://archive-server.liveatc.net/cy...2016-0430Z.mp3