Under. Part 91 in the USA I believe the SIDs are not mandatory.
Folks,
The US does not run a "one size fits all" system, if your aircraft operates under Part 91, the maintenance required is spelt out in Part 91. If your aircraft is being operated under Part 135, Part 135 is where you will find maintenance requirements, and so on.
You should be thinking about whether you want to fly in an unairworthy aeroplane, some of the Cessna wings I have seen pulled apart are truly scary.
From experience, in the strutted models, the most critical area is the main spar from the root fitting to the strut attach point, and you can only really determine the condition by getting into it, an external visual inspection, even with the tank out, is not enough.
This is not just a matter of "compliance with regulations", this is about your neck, or more importantly, the well being of other who might be in the aircraft.
Tootle pip!!