Originally Posted by Deuelly
So, regard less of whether he built or bought this LSA, if he didn't take the course required, his inspections aren't valid and the plane is unairworthy?
Every aircraft that holds a special airworthiness certificate (including all experimental and SLSA aircraft) will have operating limitations as a part of the airworthiness certificate. Those operating limitations will contain the requirement for inspections and who is authorized to perform such inspections. Typically, the inspection interval will be 12 calendar months. But as has been mentioned previously, this is not universal so you must read your operating limitations to verify the requirements.
Now, for amateur-built and ELSA, the operating limitations will contain the ability for a person holding the appropriate repairman certificate to perform the condition inspection. Who is eligible for these repairman certificates will vary between amateur-built and ELSA.
For amateur-built, only the "original primary builder" is eligible for the repairman certificate for that aircraft. Who can qualify as the "original primary builder" is the subject for a different discussion. The point here is that there's no way for anyone other than the original primary builder to gain the repairman certificate for that aircraft. If you're not the original primary builder, the common choice is to have an A&P mechanic perform the inspection.
For ELSA, a person who is the "OWNER" of the aircraft must attend and successfully complete a 16 hour course of instruction in order to gain the appropriate repairman certificate. This is true whether you are the builder of the ELSA or not. Even if you built it, you must successfully complete the course in order to gain the repairman certificate. The benefit here is that subsequent owners of the aircraft are also eligible for a repairman certificate for that aircraft after completion of the course. So an ELSA is attractive for a second or subsequent owner from this perspective.
In any case, if someone is performing condition inspections on an experimental aircraft without the appropriate repairman (or A&P) certificate, the inspections are not valid and the aircraft is not legal to fly.