212 - I suggest it all depends on the probability of these sorts of failures. The probability of having to ditch a 225 (especially with its true 30 minute dry running time, unlike Brand X) is very low but of course not zero. Surely the probability of a RIPS failure that requires icing conditions to be vacated is several orders of magnitude higher than that.
I agree that RIPS does not represent an operational hazard in Brunei
, nor much in the N Sea where there is almost always an escape route, but it could lead the unsuspecting into a flight over high ground in IMC / cumulo-granite where there is no escape route for several hours.
HC