Calling the PC-12 Experts
I need some help from the PC-12 experts here. I fly a PC-12 for an air ambulance outfit part time. We have several -9 and -10 aircraft. Recently I was flying in heavy icing and turned the ignition from auto to on (old habit from my caravan days). I got a audible alarm while they were on. I don't normally do this but the icing was strong enough that I wanted the extra ignition source so I left it on while I was exiting the icing. The audible alarm continued for the entire time I had the ignition set to on. This only happens in one aircraft. Anyone have any idea if this is normal?
Also is anyone aware of an issue with masks leaking? We have a pilot who refuses to turn on the O2 as part of the before start checklist. He says the masks in back are known for leaking and to only turn the oxygen switch on when we need to use the masks. Supposedly leaving it on will drain the crew oxygen in a matter of minutes if one of the masks in back are leaking.