| 2021-05-14 | Air Tractor, Inc., Airplanes | Apr 29, 2021 | Airframe (AT-400A) |
| 2009-11-05 | Air Tractor, Inc. Models AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, AT-502A… | Jun 1, 2009 | Airframe (AT-400A)Certain serial numbers: AT-400 -0001–-1175; AT-400A -0001–-1175; AT-402 -0001–-1175; AT-402A -0001–-1175; AT-402B -0001–-1175; AT-502 -0001–-2597; … |
| 2008-09-10 | Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, and AT-400A Airplanes | May 8, 2008 | Airframe (AT-400A)Certain serial numbers: AT-400 400-0244–400-0415. Only with: Airplanes that have aluminum spar caps (including AT-300 and AT-301 airplanes converted to turbine power). |
| 2002-25-09 | Air Tractor, Inc. Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401… | Feb 10, 2003 | Airframe (AT-400A)Certain serial numbers: AT-250 …–0829; AT-300 …–0829; AT-301 …–0829; AT-302 …–0829; AT-400 …–0829; AT-400A …–0829; … |
| 98-25-01 | Air Tractor, Inc. AT-300, AT-400, and AT-500 Series Airplanes | Jan 19, 1999 | Airframe (AT-400A)Certain serial numbers: AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B 300-0001–401B-1063; AT-501, AT-502, AT-502A, AT-502B, AT-503A 502-0001–502B-0500. Only with: Airplanes that do not have P/N 70975-1 flap actuator overtravel stop installed per Snow Engineering Co. Service Letter #165, dated May 15, 1998. |