Re: NJA Capt
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Is this your opinion or something you can back up as an official FAA policy? Please cite your source.
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The FAA is regulator, they tell the manufacturers that they must withstand the icing certification. They do not place the temp limits on the airframe. Every AFM in a "known ice" aircraft will have the limits set forth for that type aircraft. Of all the planes I have flown, they have all said 10 degrees C and visible moisture.
The FAA website spells out the effects etc of supercooled water, "Aviation Weather" gives temperature ranges to expect supercooled water, visible moister, and so on.
Avweb.com has some good articles on icing.
Also:
http://www.tcpilots.org/safety/
Flight Safety Questions and Answers
Q: What is the definition of "known icing?"
A: Although the term is not defined in Part 1 of the Federal Aviation Regulations, the NTSB's administrative law judges have developed a solid definition of known icing in their decisions on icing-related certificate actions over the years. Beginning with a case in 1957,
the NTSB has stated that icing conditions exist when temperatures are near or below freezing and visible moisture is present. They have said further that because the flight service station network states the existence of those conditions in reports and forecasts that are available to pilots both before flight and while en route, the icing conditions become "known." In a 1993 case in upholding a certificate action against a pilot who relied on pilot reports in making his go/no-go decision, the board made it clear that official weather reports and forecasts take precedence over "anecdotal" pilot reports.
Your post above is NOT a controlled environment. A controlled environment would be flying in an APPROVED aircraft and allowing it to accumulate, then blow the boots. I have been in a Navajo that picked up 1" of ice in less than 3 seconds. That could kill someone in a C172. You never know if you are going to get a trace or an inch.
That reminds me of the guys that
simulate and engine failure, in a single engine, by pulling the mixture. It's not simulating and emergency, that's
causing an emergency.
Here are several people violated (91.13) for flying inappropriate aircraft in icing conditions.
http://www.ntsb.gov/alj/o_n_o/docs/aviation/3770.pdf
http://www.ntsb.gov/alj/o_n_o/docs/aviation/4525.pdf
http://www.ntsb.gov/ntsb/brief.asp?ev_id=8222&key=0
http://www.ntsb.gov/ntsb/brief.asp?ev_id=6894&key=0