There are 4 Mcdonnell Douglas Heli 500-E 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 1988 and 1999.
N987CB
1999 Mcdonnell Douglas Heli Co 500-E
Pasadena, CA
N694AT
1988 Mcdonnell Douglas Heli Co 500-E
Port Orange, FL
N177T
Mcdonnell Douglas Heli Co 500-E
Helena, MT
N588HW
Mcdonnell Douglas Heli Co 500-E
Lynden, WA