The runway in Finner, as far as I'm aware, was never designed to handle anything much bigger that a Cessna, it's not a very long runway. The runway, along with the strip in the Curragh, were built to operate Army Co-Operation flights (open to correction here).
I don't have the runway length of Finner or the landing / take off distances of the PC-9 to hand, any one out there able to help?
Regards,
Frank.