The last one I flew (from memory) had about 4500 hours on it. The Army got great value and utilization out of that purchase. Compared generally with ADF aviation purchases of recent years which usually run over-time, over-budget, and under-perform. Look at Tiger, Seasprite, Taipan, etc. etc.
And it was quite robust and reliable whilst in service all those years. I recall a few that were Cat 5'd (including a friend of mine who was killed in a training accident in the Oakey low flying training area), and a few others that were bent, but quite a few of the original order have survived until this day. I'm curious now what is going to come of them.