Carburettor heat and Alternate air

[Pugilistic Animus]

Don't forget induction icing is still possible on fuel injected engines, although it may have automatic heating provisions----Guppy can explain more of course

I thought at first you meant an alternate static source,... I see you mean alternate induction air

if both Static sources are blocked [in the PS system] or there's only one,..you could break the crystal on the VSI,...that's why I recommend partial panel practice without the VSI

PA