The way things are at Pearl at the moment, I would be standing by for a few PT-6 failures, too!
That statement is a criticism encompassing not just the age of the aircraft, but the performance of the engineering department (and you can include the Metros in that too). The engineers have been shat on by management, and are in general pretty pissed off I would say, and rightly so. They are working hard and do not get what they need from management to do a proper job. That's my observation, anyway.
As for NT Aeromed -
1) The NT Government either don't know what provision of the service at a good standard requires, or they know and are unwilling to fund it.
2) Pearl management are ASLEEP AT THE WHEEL as far as running the company, and it is affecting ALL operations, and the Govt's aeromed contract is affected as part of that.
CR.