Type Record · As of May 3, 2026
AIR TRACTOR INC AT-400A
Fixed Wing Single Engine · P & W PT6A-27
Registered
19
Year Range
1979–1987
NTSB Events
9
Airworthiness Directives
30
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered AIR TRACTOR INC AT-400A aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- IL 36.8% 7
- TX 15.8% 3
- SD 10.5% 2
- CO 10.5% 2
- IA 5.3% 1
- MN 5.3% 1
- OR 5.3% 1
- KS 5.3% 1
- NE 5.3% 1
By Decade of Manufacture
- 1970s 10.5% 2
- 1980s 73.7% 14
- Unknown 15.8% 3
02 / NTSB Records
Events involving AIR TRACTOR INC AT-400A aircraft
9 event(s) on file. Showing the most recent 9.
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Aug 3, 2025
N3157BLamoni, Iowa
NTSB Docket → -
Mar 11, 2019
N400DQPARMA, Idaho
NTSB Docket → -
Apr 24, 2013
N23416Bowling Green, Missouri
NTSB Docket → -
Aug 23, 2006
N73006Alliance, Nebraska
NTSB Docket → -
Apr 19, 1997
N73127FLUVANNA, Texas
NTSB Docket → -
Oct 19, 1987
N73127LOCKNEY, Texas Serious
NTSB Docket → -
Aug 10, 1979
N8791SNEWDALE, Idaho
NTSB Docket → -
May 30, 1974
N4350JWHITE LAKE, North Carolina Minor
NTSB Docket → -
Nov 2, 1966
N3160XCHENEY, Kansas
NTSB Docket →
03 / Airworthiness Directives
FAA directives applicable to AIR TRACTOR INC AT-400A
30 directive(s) on file. Showing the most recent 25 · 5 more in the Federal Register.
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Mar 25, 2021
Airworthiness Directives; Air Tractor, Inc., Airplanes
The FAA is adopting a new airworthiness directive (AD) for all Air Tractor, Inc., (Air Tractor) Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, AT-502A, AT-502B, AT-503, AT-503A, AT-504, AT-602, AT- 802, and AT-802A airplanes. This AD was prom…
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Jul 28, 2020
Airworthiness Directives; Air Tractor, Inc. Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for all Air Tractor, Inc. (Air Tractor) Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT- 402B, AT-501, AT-502, AT-502A, AT-502B, AT-503, AT-503A, AT-504, AT- 602, AT-802, and AT-802A airplanes. This propo…
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May 22, 2009
Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, AT-502A, AT-502B, AT-503A, AT-602, AT-802, and AT-802A Airplanes
We are adopting a new airworthiness directive (AD) to supersede AD 2008-10-12, which applies to certain Air Tractor, Inc. AT- 400, AT-500, AT-600, and AT-800 series airplanes. AD 2008-10-12 currently requires repetitively inspecting the engine mounts for cracks, repairing any crack damage found, and installing gussets…
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Mar 31, 2009
Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-401, AT-401B, AT-402, AT-402A, and AT-402B Airplanes
We are adopting a new airworthiness directive (AD) to revise AD 2006-08-08, which applies to certain Air Tractor, Inc. (Air Tractor) Models AT-400, AT-401, AT-401B, AT-402, AT-402A, and AT-402B airplanes. AD 2006-08-08 currently requires you to repetitively eddy current inspect the wing lower spar cap in order to reac…
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Dec 24, 2008
Airworthiness Directives; Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We are adopting a new airworthiness directive (AD) to supersede AD 2008-11-17, which applies to certain Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 series airplanes. AD 2008-11-17 currently requires you to install an overturn skid plate kit or a modification to the overturn skid plate a…
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Dec 10, 2008
Airworthiness Directives; Air Tractor, Inc., Models AT-400, AT-401, AT-401B, AT-402, AT-402A, and AT-402B Airplanes
We propose to revise Airworthiness Directive (AD) 2006-08-08, which applies to certain Air Tractor, Inc. (Air Tractor), Models AT- 400, AT-401, AT-401B, AT-402, AT-402A, and AT-402B airplanes. AD 2006- 08-08 currently requires you to repetitively eddy current inspect the wing lower spar cap in order to reach the safe…
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Oct 23, 2008
Airworthiness Directives; Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We propose to supersede Airworthiness Directive (AD) 2008-11- 17, which applies to certain Air Tractor, Inc. Models AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 series airplanes. AD 2008-11-17 currently requires you to install an overturn skid plate kit or a modification to the overturn skid plate already instal…
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Jun 2, 2008
Airworthiness Directives; Air Tractor, Inc. AT-200, AT-300, AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We are adopting a new airworthiness directive (AD) to supersede AD 2002-25-09, which applies to certain Air Tractor, Inc. (Air Tractor) AT-250, AT-300, AT-400, and AT-500 series airplanes. AD 2002-25-09 currently requires you to install an overturn skid plate in the cockpit area. Since we issued AD 2002-25-09, we rece…
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May 8, 2008
Airworthiness Directives; Air Tractor, Inc. AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We are adopting a new airworthiness directive (AD) to supersede AD 2007-13-17, which applies to certain Air Tractor, Inc. (Air Tractor) Models AT-602, AT-802, and AT-802A airplanes. AD 2007-13- 17 currently requires you to repetitively inspect the engine mount for any cracks, repair or replace any cracked engine mount…
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Apr 28, 2008
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, and AT-400A Airplanes
The FAA is adopting a new airworthiness directive (AD) to supersede AD 2003-06-01, which applies to all Air Tractor, Inc. (Air Tractor) Models AT-300, AT-301, AT-302, and AT-400A airplanes that have aluminum spar caps; certain Air Tractor Models AT-400 airplanes that have aluminum spar caps; and all Models AT-300 and…
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Mar 3, 2008
Airworthiness Directives; Air Tractor, Inc. AT-200, AT-300, AT-400, AT-500, AT-600, AT-800 Series Airplanes
We propose to supersede Airworthiness Directive (AD) 2002-25- 09, which applies to certain Air Tractor, Inc. (Air Tractor) AT-250, AT-300, AT-400, and AT-500 series airplanes. AD 2002-25-09 currently requires you to install an overturn skid plate in the cockpit area. Since we issued AD 2002-25-09, we received a report…
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Dec 14, 2007
Airworthiness Directives; Air Tractor, Inc. AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We are revising an earlier proposed airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) AT-400, AT-500, AT-600, and AT-800 series airplanes. The earlier NPRM proposed to supersede Airworthiness Directive (AD) 2007-13-17, which applies to certain Air Tractor Models AT-602, AT-802, and A…
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Nov 30, 2007
Airworthiness Directives; Air Tractor, Inc. Models AT-400, AT-500, AT-600, and AT-800 Series Airplanes
We propose to supersede Airworthiness Directive (AD) 2007-13- 17, which applies to all Air Tractor, Inc. (Air Tractor) Models AT-602, AT-802, and AT-802A airplanes. AD 2007-13-17 currently requires you to repetitively inspect the engine mount for any cracks, repair or replace any cracked engine mount, and report any c…
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Nov 9, 2006
Airworthiness Directives; Air Tractor, Inc. Model AT-602 Airplanes
The FAA adopts a new airworthiness directive (AD) for all Air Tractor, Inc. (Air Tractor) Model AT-602 airplanes. This AD requires you to repetitively inspect (using the eddy current method) the wing center splice joint two outboard fastener holes on both of the wing main spar lower caps for fatigue cracking; repair o…
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Aug 9, 2006
Airworthiness Directives; Air Tractor, Inc. Model AT-602 Airplanes
The FAA proposes to revise an earlier proposed airworthiness directive (AD) that applies to all Air Tractor, Inc. (Air Tractor) Model AT-602 airplanes. The earlier NPRM would have required you to repetitively inspect (using the eddy current method) the wing center splice joint two outboard fastener holes on both of th…
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Aug 9, 2006
Airworthiness Directives; Air Tractor, Inc. Models AT-501, AT-502, AT-502A, AT-502B, and AT-503A Airplanes
The FAA proposes to revise an earlier proposed airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) Models AT-502, AT-502A, AT-502B, and AT-503A airplanes, which proposes to supersede AD 2002-26-05. AD 2002-26-05 lowers the safe life for the wing lower spar caps for Models AT-502, AT-50…
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Jun 22, 2005
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-402, AT-602, AT-802, and AT-802A Airplanes
The FAA adopts a new airworthiness directive (AD) for certain Air Tractor, Inc. (Air Tractor) Models AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-402, AT-602, AT-802, and AT-802A airplanes. This AD requires you to repetitively tighten the four eyebolts that attach the front and rear spar of the horizontal stabi…
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Mar 4, 2005
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-402, AT-602, AT-802, and AT-802A Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Air Tractor, Inc. (Air Tractor) Models AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-402, AT-602, AT-802, and AT-802A airplanes. This proposed AD would require you to repetitively tighten the four eyebolts that attach the front and rear spa…
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Apr 3, 2003
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-400, AT-400A, AT-401, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, and AT-502B Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) Models AT-300, AT- 400, AT-400A, AT-401, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT- 502, and AT-502B airplanes. This AD requires you to repetitively inspect the vertical fin front spar fitting for crack…
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Mar 19, 2003
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, and AT-400A Airplanes
This amendment supersedes Airworthiness Directive (AD) 2002- 13-02, which applies to all Air Tractor, Inc. (Air Tractor) Models AT- 300, AT-301, AT-302, and AT-400A airplanes that have aluminum spar caps; certain Air Tractor Models AT-400 airplanes that have aluminum spar caps; and all Models AT-300 and AT-301 airplan…
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Dec 27, 2002
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-400, AT-400A, AT-401, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, and AT-502B Airplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Air Tractor, Inc. (Air Tractor) Models AT-300, AT-400, AT-400A, AT-401, AT-401B, AT-402, AT-402A, AT-402B, AT- 501, AT-502, and AT-502B airplanes. This proposed AD would require you to repetitively inspect the vertical fin f…
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Dec 23, 2002
Airworthiness Directives; Air Tractor, Inc. Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-402, AT-402A, AT-501, AT-502, and AT-502A Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Air Tractor, Inc. (Air Tractor) Models AT-250, AT- 300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-402, AT-402A, AT-501, AT-502, and AT-502A airplanes. This AD requires you to install an overturn skid plate in the cockpit area.…
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Aug 29, 2002
Airworthiness Directives; Air Tractor, Inc. Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-402, AT-402A, AT-501, AT-502, and AT-502A Airplanes
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Air Tractor, Inc. (Air Tractor) Models AT-250, AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT- 402, AT-402A, AT-501, AT-502, and AT-502A airplanes. This proposed AD would require you to install an overturn skid…
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Jul 1, 2002
Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT-301, AT-302, AT-400, and AT-400A Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to all Air Tractor, Inc. (Air Tractor) Models AT-300, AT-301, AT-302, and AT-400A airplanes that have aluminum spar caps; certain Air Tractor Models AT-400 airplanes that have aluminum spar caps; and all Models AT-300 and AT-301 airplanes that have…
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Jun 2, 2000
Airworthiness Directives; Air Tractor Incorporated Models AT-301, AT-401, and AT-501 Airplanes
This amendment adopts a new airworthiness directive (AD) that applies to certain Air Tractor Incorporated (Air Tractor) Models AT- 301, AT-401, and AT-501 airplanes that are equipped with a \3/16\-inch thick aluminum fin front spar fitting and an all metal rudder. This AD requires that you repetitively inspect the ver…
07 / PMA replacement parts
FAA-approved replacement parts for AIR TRACTOR INC AT-400A
2 parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
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M2004-1#https://drs.faa.gov/browse/excelExternalWindow/EE635315435EBBDB86257D9A006B2BC3.0001##
Brush, Electrical Contact
Miraj Corporation replaces 23093-1300, 30300-1286
PMA holder → -
M2004-1#https://drs.faa.gov/browse/excelExternalWindow/11826EC63703C7F4862576B0004A39CA.0001##
Brush, Electrical Contact
Miraj Corporation replaces Goodrich 23093-1300, 30300-1286
PMA holder →
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for AIR TRACTOR INC AT-400A
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 19 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N23416 | IL | 1981 | ● | Look up ↗ |
| N2347P | SD | 1981 | · | Look up ↗ |
| N23813 | TX | 1982 | · | Look up ↗ |
| N2394N | CO | 1982 | · | Look up ↗ |
| N23951 | TX | — | · | Look up ↗ |
| N3157B | IA | — | ● | Look up ↗ |
| N3160X | IL | 1983 | ● | Look up ↗ |
| N331KE | CO | 1982 | · | Look up ↗ |
| N3650D | IL | 1980 | · | Look up ↗ |
| N3655B | IL | 1980 | · | Look up ↗ |
| N3657T | MN | 1980 | · | Look up ↗ |
| N400DQ | OR | — | ● | Look up ↗ |
| N4350J | KS | 1982 | ● | Look up ↗ |
| N497GA | SD | 1984 | · | Look up ↗ |
| N73006 | NE | 1985 | ● | Look up ↗ |
| N73085 | IL | 1985 | · | Look up ↗ |
| N73127 | TX | 1987 | ● | Look up ↗ |
| N8791S | IL | 1979 | ● | Look up ↗ |
| N8907S | IL | 1979 | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →