On Dec 4, 3:36*pm, Pat Russell wrote:
The "Operating Limitations" will require an annual "Program Letter" to
be sent to the local FSDO/FAA and placed in your aircraft folder.

I have seen this. *I have also seen Operating Limitations that do not
specify that Program Letters be submitted.

I have looked for a FAR or AC that requires Program Letters (in
general) to be submitted for Experimental Aircraft. *So far I haven't
found any such regulation.

-Pat

It depends on when the program letter was written.
Old.. Pre..(I forget the year).. did not ahve that requirement.
New.. current issue Program Letters do have the requirement.

Remember.. these are "Experimental for Exihibition and Racing".. built
by a factory and imported without a Standard Airworthy Certificate.
These are not "Experimental".. built by you and issued an airworthy
certificate based on you building it.

And there is mroe to Part 21 then mentioned above.

T