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On Dec 4, 4:03 pm, Peter Clark
wrote: On Tue, 4 Dec 2007 14:35:48 +0000 (UTC), Dylan Smith wrote: On 2007-12-02, wrote: On Dec 2, 2:30 pm, "Blueskies" wrote: The airplane is NOT approved for flight into *known* icing conditions. So when a pilot finds himself in those conditions in one of these planes, Cessna is to blame if he/she screws up and crashes... So, why do so many of them have boots and hot props and all the rest? It would seem to add a lot of expensive weight if flight through known ice is forbidden. It's there to give you more time to escape icing conditions, not so you can simply fly in known icing conditions. So all the information on flight into known icing and the related procedures and required equipment, as documented in the POH and TCDS, which do not contain language to the effect that "Must use this equipment to run away as soon as any ice shows up", is wrong? We're not talking about a SR22 with weeping wing here (I don't think any of them are known-ice certified, but some do have inadvertant encounter escape systems, and language to the effect of "Must use this equipment to run away as soon as any ice shows up.") If the Caravan is certified for known ice, then it's certified. Transport Canada's document alerts the pilot to the changes required by the AD (which is, in turn, requested by Cessna and mandated by the FAA). The placard warns the pilot to get clear of ice, and it's probably a CYA thing to protect Cessna. Many airplanes will accumulate ice fast enough to get into trouble pretty quick, de/anti- ice or not, and should get clear ASAP usually by climbing or descending to get out of cloud, or to get into cloud that's either above freezing or below the supercooled point (around -20°C). It's not an inadvertent escape system; such systems are not "certified for known ice" systems. If bozos keep killing themselves in the Caravan, Cessna will likely get the known-ice certification suspended or will get the FAA to require further training to legally fly it. There's also various levels of icing risk, and the pilot needs to avoid the worst of it. Maybe we should consult the Caravan pilots themselves, since they're the ones who do this all the time. See: http://www.caravanpilots.com/phpBB3/....php?f=1&t=460 Their opinion seems to be, almost universally, that pilots are poorly trained and don't know how to handle ice and when to get out of it. Very similar to my opinion that carburetor ice and its management is very poorly understood; otherwise, why would so many perfectly good airplanes, with functioning carb heat systems, quit with their carbs all clogged up and fall from the sky, every one of them happening when carb ice risk was elevated (temp/dewpoint spread too small)? How many pilots *really* check out the atmosphere to see what it's up to before they dive into it? Ignorance will kill you dead. Recently, not far from here, a commercial student, no less, had his carb ice up and he let it happen, and he ended up inverted in a creek, in fairly remote mountains, in early winter. One of our guys heard him going down and found him and directed a helicopter to him before the hypothermia got him. Dan |
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