There are 4 Travel Air B-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.
N13906
1929 Travel Air B-4000
Oklahoma City, OK
N409N
Travel Air B-4000
Thousand Oaks, CA
N8883D
Travel Air B-4000
Kalispell, MT
N9904
Travel Air B-4000
Thousand Oaks, CA