jcarlyle wrote:
I picked another number, 10.220/40, for a United altimeter which I
know is in production, but I had no luck in finding the text for this
TS document on the Web. So at this time its still unclear if the a LBA
TS will link back to a TSO.

I tried this a couple of years ago with a turn indicator. (Actually,
that's why I know about it.) When I asked, the LBA said that those
sheets are not on the web, and they sent me a PDF.