Which aircraft have a alternate air on the panel for air to the throttle body and how would your throttle body ice up do to carb ice ? There is no fuel going thru it.
++++++++++++++++++ My Cherokee Six had exactly that - spring loaded auto open and was cable controlled from the cockpit. This has nothing to do with the throttle body or anything else that is downstream from this point where another air source would offer no relief anyway. This alternate air facility provides a separate source of intake air from within the cowl if the inlet ducting (that is upstream) ices over. Steve Jacobs Zambia
