>REMEMBER - if your ASI /VSI /Alt does funny things, the static vent may >be iced over. Breaking the glass on any one of these will effectively >provide venting to the cabin (for all of them). Think about it today, >so that if it ever happens, you will already know which one you are >prepared to break - no time to think about it when it happens, you will >probably have a few other things to worry about.
Some people put in an alternate air source switch, which lets in cabin air, to cover this situation - saving the instrument! Larry Severson Fountain Valley, CA 92708 (714) 968-9852 lar...@socal.rr.com