TK
Quite happy to answer some questions
you asked: "How long did the Longranger sit on the hospital pad until the engine was swapped out?"
It was only on the helipad until the ground handling wheels where attached and a/c pushed into hangar! The heliport is big enough for several helicopters, if thats your point? SuperF has a very valid point, I believe Taranaki Base Hospital is suitable for certain singles (B206, B206L, R44, AS350 etc) all helicopters have differing auto performance and I think in some singles you could plan an approach / departure for at Taranaki Base Hospital. Unfortunately the Taranaki Rescue Trust operate a A119 and that won't comply, the shame of it is that its new, and has a PT6 engine, probably the best turbine engine out there.
TK You asked:"Also, the fact that it had to shutdown and stay on the hospital pad for XXX days/weeks/months while the engine was swapped out means it complied with Cat A, Performance Class 1 how?"
Its a single so can not comply with Cat A, Performance Class 1, but if the hospital has suitable approach / departure routes and the helicopter has suitable auto performance this may not be a problem.
TK you asked: "How long can a Longranger/C30 keep performing at full power with a failed oil scavenge pump before it's performance degrades and becomes a problem? "
It would seem long enough to make a safe landing, but perhaps RR could answer that one?
TK you asked:"Port of Taranaki to Taranaki Base Hospital is how many metres?"
Just over 1nm, a park and school playing fields in between, the helicopter had been flying for the previous half hour, why the question?
TK stated:"I am sitting with a former senior manager of one of New Zealand's biggest hospitals and he just bout fell of his chair laughing at your suggestion that the flights out of New Plymouth are signed off by a flight nurse.
"That's a sad joke...Tell that guy not to say that to loudly in case the hospital's insurers hear," were his comments!"
If you are an EMS helicopter, the best people on board to assess the patient would be a doctor, paramedic or flight nurse, not flight crew. I wouldn't land at an elevated helipad in a single with a patient on board unless the medical crew expressed a critical requirement to do so. This was the case, and the flight nurse had no problem making a statement to the effect. Certainly no "joke" or "laughing matter".