Are you familiar with the introduction to service of the RAF's Mk 3A Sea King? It is not unusual to have teething problems with a new type or variant. I am pretty sure that a re-worked S61/Sea King with new engines/rotors/FCS/avionics/cockpit and all of the integration that would be required would also have its drawbacks. The trouble with that approach is that it would, in the end, be bit like Trigger's broom, so why not just start with a clean sheet/modern design? The NH90 is about Sea King size, bigger than the 139 and smaller than the 101, yet seldom gets a mention. Too expensive or are there other disadvantages?
