with 8,306 hours on an airframe, what is the life limit to a) stop flying aerobatics, and b) stop flying normal category? I would assume that the flight hours are not clearly documented to distinguish normal, utility, and aerobatic hours. Even if this available, how can the lifelimit of the airframe be determined? Some new aerobatic aircraft are equipped with an AMU1-C unit that records "G" forces/time. The data is downloaded and sent to the factory and a graph is formulated giving the lifelimit of wings, spar bolts, engine mounts, and cables. Some rentals are equipped to safeguard the owners from renters that overstress the aircraft. As the aircraft age, any thoughts?
