Originally Posted by
Huck
The issue wasn't accreting ice.
The issue was complying with the MEL.
"Do not operate aircraft in known or forecast icing conditions."
Doesn't say "fly along until you get in icing conditions, then climb/descend/turn to get back out of them."
Agreed, I just don't think that high cirrus clouds constitute "known icing" nor would I expect to get any. Lower, slower, cumulous clouds, yes...but not cruising through cirrus at FL XXX at .82 to .84.