Originally Posted by
tomato coupe
F1 cars have to last only one season, and commercial aircraft must pass inspection every 100 hours.
Not accurate.
Part 91 aircraft used for hire require a 100 hour inspection. Example: cessna 172 used for flight instruction. I can assure you that the mechanic is not checking for micro cracks on every square inch of the airframe.
Airlines go by cycles. Every part has to be inspected at a certain amount of cycles, and each part has a different cycle requirement, and it varies for each airframe.