Pace,
But still that beggars the question of what is considered old ?
This is a completely separate and different issue. Could I suggest you start another thread on age and the rules of commercial flying.
On top of that some basic reaction problem solving tests over 70 might help
And what is your evidence for this being needed at a particular age, ie 70? You don't like 60, you don't like 65, but 70, now that's OK for tests, because that's really old; is that your thinking?
Either we accept that people all age at different rates, or we assume - as happens now in commercial/airline flying - that beyond 60 it's safer to get rid of them. The latter attitude is, as far as I can ascertain, based on.....very, very little in the way of medical evidence. But either way, this is a different issue from what we've been discussing here. Now I know this is PPRuNe and I'm not a mod and it's not up to me, but it seems a shame to let an interesting discussion drift over into an 'age and flying for the airlines' issue which has been discussed ad infinitum on here over the years I've been around on PPRuNe - too many, before anyone else says it.