Originally Posted by
Check Airman
Do you have a reference for that? We leave it on AUTO all the time as well.
It still transmit even with engines shutdown. It happens to me a couple of times that ATC request us to put the transponder on STBY when we were at the gate. 99% of time ATC does not give a toss tho.
By Airbus SOP, transponder should be set on Stby at the gate and back on Auto when start up clearance is received.