There is not one word in Part 91 relating to "known icing" other than
91.527, which applies to large and turboprop aircraft. The closest you can
come is 91.9, so there is nothing to "trump" because the POH wording is not
consistent between manufacturers or models (and, as some have pointed out,
some POHs say nothing about icing).

The west slopes of the Cascades are notorious for icing..the Concorde was
sent out here for icing certification. If you can climb (or descend) over
the flatlands to the west of Seattle, you can miss the icing zone. The
newsletter simply tells pilots that when ATC turns them east on departure,
cleared to some altitude that will take them into the ice, they do not have
to accept the clearance...nor need they descend into the clouds on the west
side simply because a controller clears them to a lower altitude.

Bob Gardner

"Greg Esres" wrote in message
...
Obviously, since this procedure was developed by the FAA and
published in the Safety Program newsletter every year at this time, a
forecast of icing conditions is not, in and of itself, a bar to
flight.


Hmmmm...You're saying that the Safety Program newsletter trumps the
FARs?