FAA letter on flight into known icing

The FAA reply starting this thread illustrates one of the many frustrations I
have with the FAA. Given a very specific question, they responded with some
generalities and then sidestepped the answer. They also completely ignored
other implied parts of the question.

If there is NO PROHIBITION ANYWHERE for a specific aircraft, say because it was
grandfathered, then is it prohibited from flying legally in known icing? What
is the FAA's take on using the "careless and reckless" rule in this case?

There are no noises in this letter from the FAA about that. Thus, Steven P.
McNicoll and I will continue to disagree on whether or not it's legal (in most
cases).

Nothing like possibly a definate maybe from the folks that make the rules.

Jose

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