"Steven P. McNicoll" wrote in message
.net...
|
| "Teacherjh" wrote in message
| ...
|
| This applies to large and turbine powered aircraft.
|
| For us little guys, ANY ICE AT ALL is forbidden. (unless the aircraft
is
| certified for known ice, which very few spam cans are).
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|
| Forbidden by what?

The published operating limitations of the aircraft, which must be adhered
to in accordance with the type certificate and the general prohibition
against reckless and dangerous operation. Most modern light planes have
specific provisions in their type certificates prohibiting flight into known
icing conditions.

Additionally, commercial operators flying under part 135 are prohibited from
flying into known icing conditions unless the aircraft is certified for it.