Hi - you've surprised me on the Beech - I've got a scanned version of one or two POHs from Beechcraft with no copyright indicated, but perhaps the person scanning purposely ommitted this.
My basis was that I also used to assert that the POH was a copyright document until my co-author advised me that it wasn't. Thereafter I looked for a reference to copyright in the POHs, or let me rather call them AFMs, onboard some of the aircraft my clients operated, and failed to find anything.
I'll take another look at the C172s at the field next week, and I will also take it all back if I'm wrong, but I won't take down the collection:
- first as I found them on the net mostly, second I find them immensly helpful training aids, and lastly as I'd rather be sued by Cessna for the publicity (

).
Cessna makes money out of selling aircraft not writing books - (or hopefully not from sueing small flight school owners)?
But as with you I will also go quietly if I'm wrong, and we'll definitely stop selling them to the students - but we won't stop the students borrowing a copy to make their own....
The Cessna maintenance manuals have a clear copyright on the first page, no doubt about it.
Jog my memory on OEM - ? It's in there somewhere but can't seem to remember.
The docs I am referring to are not the FAA data sheets, its the nice book that's in the aircraft that has all those nice sections, which after 1976 are normally labelled and in order from 1-10 - but I wish someone would get some standardisation on terms. I'll think I'll call them MOM (the PIM) and AFM (the POH) - one being a generic and one being the approved version required to be onboard, hows that?