If gross negligence, poor crew training and blatant disregard of safe procedures and operations were grounds for ceasing operations as per Aviation Authority's order, maybe Travira and very few others would still be running.
TW, that was picked out of context. The sentence above uses 2nd conditional
(example) and the main and subordinate clauses are different. Anyway, must use simpler English and shorter sentences next time.
I meant to say that if safety disregard and negligence were reasons for grounding airline/charter company, then very few would STILL be running, if enforced, including for example Travira. As one of the better/good ones.
RE: PT6 and fuel issues. It isn't known (at least for us) which part of the fuel system.
I doubt it was directly in the engine itself and forward of the firewall. The PT6 has pretty good track record if maintained properly and not abused or FOD damage to it. The fact both Porter and Van share same line of PT6 powerplant, doesn't automatically mean grounding Caravans. True, fuel distribution in light singles isn't as complicated as airliners, but some freak cause did happen in this case indeed.