Quote:
Originally Posted by aloft  Is it regulatory in nature, meaning one may not fly within the area described by the AIRMET in an aircraft not certified for flight in icing conditions; or is it simply advisory--as in, you'd do well to keep on the lookout? |
The case law hasn't been very permissive about this issue. Forecast icing has been treated as known icing. If you flew at or above the forecast freezing level and encountered problems due to icing, you'd probably get hit with violating the "known icing" prohibition.
I believe the FAA has recently updated its guidance on this, but I haven't read it. Midlifeflyer probably has the references.