Randy G has a point. When it happened to me the day I had multiple failures,I was only doing about 60 knots [vis about half a mile]so there wouldn't have been a big nose down attitude.That day was probably an ideal combination of temperature, moisture etc to get that heavy wet and sticky snow.We had resisted snow deflectors up until then as the TOT increase from them restricted our ability to move drills at the altitudes required. Used them after that if it even looked like snow.
My point was more that Flight Manuals these days are written by lawyers and they come up with all kinds of protective measures when a known weakness exists.When I can't think of an obvious reason for something that's what my suspicious mind concludes.