Mike, don't feel bad about this. I've been flying the PC-12 for eight years now, and there's one button on the yoke that I have NEVER figured out what it is for!!! Apparently it is an extra switch, or it is for a system that is never installed on planes intended for the US Market (bombs away? guns?).
Once upon a time, someone told me what that switch was intended for, but I forgot it and now I have no clue. Since I never have used it, it gets ignored. Is there anyone in the forum who could help enlighten me? Hehe.
Another great strip, guys!
RC