Larry Dighera wrote:

Of the 5 POHs I checked, only the Rockwell International 112A
mentioned using carb-heat as an alternate air source.

My understanding from the old Jeppesen-Sandersen PP manual was that this is
standard; IOW, if your plane has carb heat, that's the alternate air source.
I would assume that most POHs would not mention something that they feel to be
obvious.

George Patterson
Battle, n; A method of untying with the teeth a political knot that would
not yield to the tongue.