Quote:Jumpjim
"I can think of no reason you would EVER want to turn off the transponder once in flight, and I think that we will find this option is rapidly removed from the flight deck.. "
The time mine started squawking 7600, despite what it was set for, in the YYZ control zone comes to mind
14k hours and never had a transponder squawk something that I hadn't set (deliberate or as a mistake). Besides you've got two... Switch it over to the other one. HIGHLY unlikely that both would be buggering around... The point stands..
There has to be some form of overheat protection.