There are 3 Travel Air C-4000 aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top.
N639H
1929 Travel Air C-4000
Nicollet, MN
N9952
1929 Travel Air C-4000
Clovis, CA
N379M
Travel Air C-4000
Cardiff, CA