There are 37 Air Tractor AT-400 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 1980 and 1986.
N144KS
1986 Air Tractor INC AT-400
Ovid, MI
N400XX
1986 Air Tractor INC AT-400
Tipton, OK
N2254L
1985 Air Tractor INC AT-400
Nickerson, KS
N73005
1985 Air Tractor INC AT-400
Nassau, DE
N7307T
1985 Air Tractor INC AT-400
Ovid, MI
N73080
1985 Air Tractor INC AT-400
Page, ND
N73084
1985 Air Tractor INC AT-400
Seneca, KS
N7308A
1985 Air Tractor INC AT-400
Artesia, NM
N3164B
1984 Air Tractor INC AT-400
Glen Allan, MS
N3166Y
1984 Air Tractor INC AT-400
Dixie, GA
N7300E
1984 Air Tractor INC AT-400
Inverness, MS
N7300M
1984 Air Tractor INC AT-400
Fisher, MN
N136DB
1983 Air Tractor INC AT-400
Artesia, NM
N31626
1983 Air Tractor INC AT-400
Chowchilla, CA
N31627
1983 Air Tractor INC AT-400
D Hanis, TX
N23744
1982 Air Tractor INC AT-400
Centralia, IL
N3159B
1982 Air Tractor INC AT-400
Perryton, TX
N3160Q
1982 Air Tractor INC AT-400
Avoca, TX
N444AS
1982 Air Tractor INC AT-400
Ovid, MI
N2306A
1981 Air Tractor INC AT-400
Mandeville, LA
N23618
1981 Air Tractor INC AT-400
Mattoon, IL
N23649
1981 Air Tractor INC AT-400
Tipton, OK
N23720
1981 Air Tractor INC AT-400
Lamoure, ND
N6072Y
1981 Air Tractor INC AT-400
Salt Lake City, UT
N81400
1981 Air Tractor INC AT-400
Wilmington, DE
N82400
1981 Air Tractor INC AT-400
Rochelle, GA
N3652Z
1980 Air Tractor INC AT-400
Walters, OK
N6082Y
1980 Air Tractor INC AT-400
Chilton, WI
N155HF
Air Tractor INC AT-400
Walnut, IL
N2393N
Air Tractor INC AT-400
Boonville, MO
N36538
Air Tractor INC AT-400
Coy, AR
N3654G
Air Tractor INC AT-400
Bradley, AR
N3655T
Air Tractor INC AT-400
Hearne, TX
N3659N
Air Tractor INC AT-400
Beaman, IA
N432WA
Air Tractor INC AT-400
Walnut, IL
N444MS
Air Tractor INC AT-400
Ovid, MI
N501JK
Air Tractor INC AT-400
Chanute, KS