kopterdoc Posted November 17, 2009 Report Share Posted November 17, 2009 We have operated two Bell 407's at -40 and colder ( with Jet A-1)for the last two winters and had no problem with the heaters keeping up. They are both equipped with Air Comm heaters though and Tanis preheat kits as well. And just for info. when operating in these cold conditions, the smoke that comes out of your exhaust will make you think you blew an oil seal but actually it is normal. Quote Link to comment Share on other sites More sharing options...
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