The back to birth history requirement is an interesting one. Our Cessna was built in 1967 and has 10'000 hours. The log books go back to 1983 and the 7000 hour point.. Therefore 16 years and 7000 hours of it's life are missing. Anybody know what will happen when it comes up for ARC renewal? We have operated it without question for 14 years and 6 C of A renewals.