Challenger Crashe at TEB

They used to say you could "polish" the frost smooth with a rag or gloved
hand, although I have not heard of that in a long time and I would never
do it on a supercritical wing shape. *Maybe* a light single engine, but
never a business jet.

But even so, that still leaves the question of the top of the T tail.

Best answer is a quick spray down with the deice truck - wouldn't take
much to get rid of a morning frost.

"They" still say you can polish, at least for 135 operations!

Sec. 135.227 - Icing conditions: Operating limitations.

(a) No pilot may take off an aircraft that has frost, ice, or snow adhering
to any rotor blade, propeller, windshield, wing, stabilizing or control
surface, to a powerplant installation, or to an airspeed, altimeter, rate of
climb, or flight attitude instrument system, except under the following
conditions:

(1) Takeoffs may be made with frost adhering to the wings, or stabilizing or
control surfaces, if the frost has been polished to make it smooth.



Karl