the MGB in question, did not fail within 10 mins. it has been proved that the rotors were still turning on impact with the water,
Bobby, so you are saying that there was no failure of the MGB. Perhaps the bit that drives the tail rotor (that failed big time), does not count as MGB in your book? I hope you will not be maintaining the transmission on my helicopter!...
And yes, after 2 major failures the filter housing has been modified. Pity it was not done expeditiously after the first failure, or better still, adequately designed in the first place in "the world's safest helicopter".