I thought this would get some lather up.
I'll buy the CAS training argument, and the armed escort/recce argument, particularly when you consider where Irish forces are likely to be operational over the next 20+ years and what they will be about, such as peace enforcement in Africa and ISAF duty in Afghansitan, etc. This suggests the PC-9's are deployable and should train-up accordingly. Maybe that's already in the plan.
As for maintaining experience and skills, maybe, but for what eventuality? The development of a true air combat capability? I don't see that looming anywhere over the horizon - no requirment equal to the cost. A realistic evaluation of potential threats to the Republic pretty much exludes the need for an armed fixed wing capability. So I'm back to my original question as to whether or not armed PC-9's are good value for money considering actual requirments?
The next wave of hotshot IAC pilots will fly the AB-139 in the Battlefied Support Helicopter role in Ireland and overseas, including SF insertions and extractions at night on NVG's, with 7.62mm mini-guns pointing out either side, and most likely as part of a multi-national air component. So six or eight 139's is the right number to provide a credible, deplyable force package of at least four. And Ireland needs an airlifter. Just a question of building a balanced force.
Cheers