There are 15 Learjet 31 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 1990.
N103JL
1990 Learjet INC 31
Buffalo, NY
N10VJ
1990 Learjet INC 31
Lititz, PA
N1DE
1990 Learjet INC 31
Mooresville, NC
N2FU
1990 Learjet INC 31
Dallas, TX
N31YA
1990 Learjet INC 31
Houston, TX
N90WA
1990 Learjet INC 31
Salt Lake City, UT
N38MG
1989 Learjet INC 31
Atlanta, GA
N30LJ
1988 Learjet INC 31
Tampa, FL
N888CP
1988 Learjet INC 31
Wilmington, DE
N5VG
Learjet INC 31
Wilmington, DE
N103TD
Learjet INC 31
Wilmington, DE
N37AC
Learjet INC 31
Newark, DE
N50AN
Learjet INC 31
Miami, FL
N731GA
Learjet INC 31
Dover, DE
N77779
Learjet INC 31
Wilmington, DE