Hair
My, my, we are defensive arn't we. Certainly my knee jerks and my eyes water when I pay my insurance premiums. This is hardly the first R22 to suffer carb icing. This guy was put in a position where his experience was inadequate because the helicopter had not got fuel injection and he made an error. Had the aircraft had injection it would not have crashed. No carb, no ice problem.
The pilot did apply carb heat but not enough. Hands up anyone who flies an R22 and has never completed a descent and found they omitted the carb heat, but got away with it.
I haven't checked but I bet there are no Raven 2 carb ice incidents!
If injection is not required why did Frank bother to put it on the Raven2???