There are 3 Mbb BK 117 A-3 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. The ones listed here were built between 1984 and 1986.
N117SR
1986 Mbb BK 117 A-3
Aiken, SC
N112LL
1984 Mbb BK 117 A-3
Greenville, DE
N116SR
Mbb BK 117 A-3
Aiken, SC