My mechanic, friend, and good flying buddy, Clyde Grant turned 82 this March. We rebuilt my Tripacer this winter, and he is rebuilding a PA-11 now. Out of the 103 planes that made it to last years SWPC convention, he put abut 12 of them back in the air. I gave him his medical and he passes with less problems than most and one of my instructors said he had no difficulties on his BFR. He sold his Pacer last year but still pulls out the Luscombe. I'd fly with him any day, and I'd let him rebuild my plane again if he hadn't done such a good job the first time that it probably wont need it again for another 30 years.
Age is what you make of it.
Barb