# Air Tractor AT-401

- Type: Aircraft model (FAA registry)
- Registry codes: 0390204, 0390209
- Manufacturer (registry): AIR TRACTOR INC
- Model: AT-401
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 1
- Weight class: Up to 12,499 lb
- Certification: Type certificated
- Data sheet: [TCDS A17SW](https://openairdocs.org/tcds/A17SW) (OpenAirDocs)
- Holder: Air Tractor Inc.
- Registered aircraft: 50
- Page: https://openairdocs.org/model/air-tractor-at-401

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2022-03-15](https://openairdocs.org/ad/2022-03-15): Fuel Quantity Indicator · Garmin G3X Touch Electronic Flight Instrument System (STC SA01899WI or SA02658SE). Effective Mar 21, 2022
- [AD 2021-05-14](https://openairdocs.org/ad/2021-05-14): TE flap control system · Air Tractor AT-250, AT-300, AT-301 and 19 more. Effective Apr 29, 2021
- [AD 2006-08-08 R1](https://openairdocs.org/ad/2006-08-08-R1): Wing lower spar cap · Winglets (Aero Spraying Service STC SA00490LA). Effective May 5, 2009
- [AD 2008-26-01](https://openairdocs.org/ad/2008-26-01): Overturn skid plate kit · Air Tractor AT-250, AT-300, AT-301 and 15 more. Effective Jan 28, 2009
- [AD 2005-13-12](https://openairdocs.org/ad/2005-13-12): Front and rear spar of the horizontal stabilizer · Air Tractor AT-300, AT-301, AT-302 and 11 more. Effective Aug 5, 2005
- [AD 2004-15-15](https://openairdocs.org/ad/2004-15-15): Aft Fuselage Upper Longeron · Air Tractor AT-401, AT-401B, AT-402 and 10 more. Effective Sep 7, 2004
- [AD 2003-07-04](https://openairdocs.org/ad/2003-07-04): Vertical Fin Front Spar Fittings · Air Tractor AT-300, AT-400, AT-400A and 8 more. Effective May 22, 2003
- [AD 2000-11-05](https://openairdocs.org/ad/2000-11-05): Vertical Fin Front Spar · Air Tractor AT-301, AT-401 and AT-501. Effective Jun 23, 2000
- [AD 98-25-01](https://openairdocs.org/ad/98-25-01): Flap Actuator Overtravel Stop · Air Tractor AT-300, AT-301, AT-302 and 13 more. Effective Jan 19, 1999
- [AD 97-14-05](https://openairdocs.org/ad/97-14-05): Fin Front Spar Attachment Fittings · Air Tractor AT-301, AT-302, AT-400 and 5 more. Effective Aug 25, 1997
- [AD 96-24-08](https://openairdocs.org/ad/96-24-08): Parking Brake Valve · Air Tractor AT-250, AT-300, AT-301 and 7 more. Effective Dec 23, 1996

Historical (superseded or no longer in force):

- [AD 2008-11-17](https://openairdocs.org/ad/2008-11-17) (historical): Overturn skid plate in the cockpit area · Air Tractor AT-250, AT-300, AT-301 and 14 more. Effective Jul 7, 2008
- [AD 2006-08-08](https://openairdocs.org/ad/2006-08-08) (historical): Wing lower spar cap · Air Tractor AT-400, AT-401, AT-401B and 3 more. Effective Apr 21, 2006
- [AD 2002-25-09](https://openairdocs.org/ad/2002-25-09) (historical): Overturn skid plate · Air Tractor AT-250, AT-300, AT-301 and 10 more. Effective Feb 10, 2003
- [AD 2002-11-05](https://openairdocs.org/ad/2002-11-05) (historical): Wing Lower Spar Cap · Winglets (Aero Spraying Service STC SA00490LA). Effective Jul 12, 2002
- [AD 2001-10-04 R1](https://openairdocs.org/ad/2001-10-04-R1) (historical): Wing Lower Spar Cap · Air Tractor AT-400, AT-400A, AT-401 and 11 more. Effective Jun 8, 2001
- [AD 2001-10-04](https://openairdocs.org/ad/2001-10-04) (historical): Wing Lower Spar Cap · Air Tractor AT-400, AT-401, AT-401B and 10 more. Effective Jun 8, 2001
- [AD 96-23-19](https://openairdocs.org/ad/96-23-19) (historical): Flap Actuator Overtravel Stop · Air Tractor AT-300, AT-301, AT-302 and 13 more. Effective Dec 18, 1996

## Information bulletins (advisory) (4)

- [SAIB CE-16-27](https://openairdocs.org/saib/CE-16-27): Flight Controls, Trailing Edge (TE) Flap Control System. Issued Oct 31, 2016
- [SAIB CE-11-41](https://openairdocs.org/saib/CE-11-41): Fuselage, Wing Attach Fittings. Issued Jun 29, 2011
- [SAIB CE-11-30](https://openairdocs.org/saib/CE-11-30): Aircraft Structures. Issued May 9, 2011
- [SAIB CE-04-23](https://openairdocs.org/saib/CE-04-23): . Issued Dec 2, 2003

## Registered aircraft (50)

- [N1005N](https://openairdocs.org/aircraft/N1005N): [Madsen Travis E](https://openairdocs.org/faa-owner/MADSEN%20TRAVIS%20E), [New Underwood, SD](https://openairdocs.org/faa-place/SD/New%20Underwood), built 1988, S/N 401-0692
- [N1008Q](https://openairdocs.org/aircraft/N1008Q): [Tall Towers Aviation Inc](https://openairdocs.org/faa-owner/TALL%20TOWERS%20AVIATION%20INC), [Page, ND](https://openairdocs.org/faa-place/ND/Page), built 1988, S/N 401-0702
- [N1010L](https://openairdocs.org/aircraft/N1010L): [Devil Dusters Inc](https://openairdocs.org/faa-owner/DEVIL%20DUSTERS%20INC), [Artesia, NM](https://openairdocs.org/faa-place/NM/Artesia), built 1989, S/N 401-0708
- [N1012T](https://openairdocs.org/aircraft/N1012T): [Johnson Airspray Inc](https://openairdocs.org/faa-owner/JOHNSON%20AIRSPRAY%20INC), [Argyle, MN](https://openairdocs.org/faa-place/MN/Argyle), S/N 401-0719
- [N1013F](https://openairdocs.org/aircraft/N1013F): [Corpora Aerial Service Inc](https://openairdocs.org/faa-owner/CORPORA%20AERIAL%20SERVICE%20INC), [Hearne, TX](https://openairdocs.org/faa-place/TX/Hearne), built 1989, S/N 401-0721
- [N1013S](https://openairdocs.org/aircraft/N1013S): [Tr Flying Service LLC](https://openairdocs.org/faa-owner/TR%20FLYING%20SERVICE%20LLC), [Milan, MN](https://openairdocs.org/faa-place/MN/Milan), built 1989, S/N 401-0724
- [N1014N](https://openairdocs.org/aircraft/N1014N): [Frontier Agricultural Service Inc](https://openairdocs.org/faa-owner/FRONTIER%20AGRICULTURAL%20SERVICE%20INC), [Calexico, CA](https://openairdocs.org/faa-place/CA/Calexico), built 1989, S/N 401-0729
- [N1015A](https://openairdocs.org/aircraft/N1015A): [Frontier Agricultural Service Inc](https://openairdocs.org/faa-owner/FRONTIER%20AGRICULTURAL%20SERVICE%20INC), [Calexico, CA](https://openairdocs.org/faa-place/CA/Calexico), S/N 401-0735
- [N1015L](https://openairdocs.org/aircraft/N1015L): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1989, S/N 401-0730
- [N10192](https://openairdocs.org/aircraft/N10192): [Frontier Agricultural Service Inc](https://openairdocs.org/faa-owner/FRONTIER%20AGRICULTURAL%20SERVICE%20INC), [Calexico, CA](https://openairdocs.org/faa-place/CA/Calexico), built 1989, S/N 401-0731
- [N1529W](https://openairdocs.org/aircraft/N1529W): [Olathe Spray Service Inc](https://openairdocs.org/faa-owner/OLATHE%20SPRAY%20SERVICE%20INC), [Olathe, CO](https://openairdocs.org/faa-place/CO/Olathe), built 1992, S/N 401-0848
- [N15439](https://openairdocs.org/aircraft/N15439): [Dietz Timothy E](https://openairdocs.org/faa-owner/DIETZ%20TIMOTHY%20E), [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla), S/N 401-0862
- [N15449](https://openairdocs.org/aircraft/N15449): [Headwaters Flying Service LLC](https://openairdocs.org/faa-owner/HEADWATERS%20FLYING%20SERVICE%20LLC), [Three Forks, MT](https://openairdocs.org/faa-place/MT/Three%20Forks), built 1992, S/N 401-0868
- [N1546U](https://openairdocs.org/aircraft/N1546U): [Bauer Charles A](https://openairdocs.org/faa-owner/BAUER%20CHARLES%20A), [Graceville, MN](https://openairdocs.org/faa-place/MN/Graceville), built 1992, S/N 401-0873
- [N1546X](https://openairdocs.org/aircraft/N1546X): [Hopkins Robert E Jr](https://openairdocs.org/faa-owner/HOPKINS%20ROBERT%20E%20JR), [Sumter, SC](https://openairdocs.org/faa-place/SC/Sumter), built 1992, S/N 401-0874
- [N1554K](https://openairdocs.org/aircraft/N1554K): [Basin Aviation Inc](https://openairdocs.org/faa-owner/BASIN%20AVIATION%20INC), [Rio Oso, CA](https://openairdocs.org/faa-place/CA/Rio%20Oso), S/N 401-0882
- [N299JH](https://openairdocs.org/aircraft/N299JH): [Johnson Airspray Inc](https://openairdocs.org/faa-owner/JOHNSON%20AIRSPRAY%20INC), [Argyle, MN](https://openairdocs.org/faa-place/MN/Argyle), built 1990, S/N 4010726
- [N401BM](https://openairdocs.org/aircraft/N401BM): [Bart'S Flying Service Inc](https://openairdocs.org/faa-owner/BART'S%20FLYING%20SERVICE%20INC), [Storm Lake, IA](https://openairdocs.org/faa-place/IA/Storm%20Lake), built 1992, S/N 401-0853
- [N401CW](https://openairdocs.org/aircraft/N401CW): [Dakotawild Aviation Inc](https://openairdocs.org/faa-owner/DAKOTAWILD%20AVIATION%20INC), [Westhope, ND](https://openairdocs.org/faa-place/ND/Westhope), built 1992, S/N 401-0870
- [N401KR](https://openairdocs.org/aircraft/N401KR): [East Air Aviation LLC](https://openairdocs.org/faa-owner/EAST%20AIR%20AVIATION%20LLC), [Cullman, AL](https://openairdocs.org/faa-place/AL/Cullman), built 1991, S/N 401-0813
- [N401TH](https://openairdocs.org/aircraft/N401TH): [Aerial Ag Services LLC](https://openairdocs.org/faa-owner/AERIAL%20AG%20SERVICES%20LLC), [Hillsboro, TX](https://openairdocs.org/faa-place/TX/Hillsboro), S/N 401-0875
- [N408AC](https://openairdocs.org/aircraft/N408AC): [Over & Under Flying Service Inc](https://openairdocs.org/faa-owner/OVER%20%26%20UNDER%20FLYING%20SERVICE%20INC), [Winamac, IN](https://openairdocs.org/faa-place/IN/Winamac), built 1993, S/N 4010921
- [N409BR](https://openairdocs.org/aircraft/N409BR): [Mehling Robert C](https://openairdocs.org/faa-owner/MEHLING%20ROBERT%20C), [Hardin, MT](https://openairdocs.org/faa-place/MT/Hardin), S/N 4010909
- [N45116](https://openairdocs.org/aircraft/N45116): [Macys Flying Service Inc](https://openairdocs.org/faa-owner/MACYS%20FLYING%20SERVICE%20INC), [Tulelake, CA](https://openairdocs.org/faa-place/CA/Tulelake), built 1990, S/N 401-0752
- [N4513W](https://openairdocs.org/aircraft/N4513W): [Forest Flying Services Inc](https://openairdocs.org/faa-owner/FOREST%20FLYING%20SERVICES%20INC), [Langdon, ND](https://openairdocs.org/faa-place/ND/Langdon), S/N 401-0754
- [N4535U](https://openairdocs.org/aircraft/N4535U): [Cga Holdings LLC](https://openairdocs.org/faa-owner/CGA%20HOLDINGS%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), S/N 401-0773
- [N45368](https://openairdocs.org/aircraft/N45368): [Atlantic Ag Aviation Inc](https://openairdocs.org/faa-owner/ATLANTIC%20AG%20AVIATION%20INC), [Felton, DE](https://openairdocs.org/faa-place/DE/Felton), built 1990, S/N 401-0775
- [N4539B](https://openairdocs.org/aircraft/N4539B): [Woodley Aerial Leasing LLC](https://openairdocs.org/faa-owner/WOODLEY%20AERIAL%20LEASING%20LLC), [Walnut, IL](https://openairdocs.org/faa-place/IL/Walnut), built 1990, S/N 401-0763
- [N4539Y](https://openairdocs.org/aircraft/N4539Y): [Hylands Agricultural Services LLC](https://openairdocs.org/faa-owner/HYLANDS%20AGRICULTURAL%20SERVICES%20LLC), [Gretna, NE](https://openairdocs.org/faa-place/NE/Gretna), S/N 401-0779
- [N45421](https://openairdocs.org/aircraft/N45421): [Ascend Ag Inc](https://openairdocs.org/faa-owner/ASCEND%20AG%20INC), [Wall, SD](https://openairdocs.org/faa-place/SD/Wall), S/N 401-0786
- [N4547Q](https://openairdocs.org/aircraft/N4547Q): [Farm Air Inc](https://openairdocs.org/faa-owner/FARM%20AIR%20INC), [Quanah, TX](https://openairdocs.org/faa-place/TX/Quanah), S/N 401-0792
- [N45492](https://openairdocs.org/aircraft/N45492): [Woodley Aerial Leasing LLC](https://openairdocs.org/faa-owner/WOODLEY%20AERIAL%20LEASING%20LLC), [Walnut, IL](https://openairdocs.org/faa-place/IL/Walnut), built 1991, S/N 401-0801
- [N4549E](https://openairdocs.org/aircraft/N4549E): [Vertical Vegetation Management LLC](https://openairdocs.org/faa-owner/VERTICAL%20VEGETATION%20MANAGEMENT%20LLC), [Darlington, IN](https://openairdocs.org/faa-place/IN/Darlington), S/N 401-0765
- [N4556W](https://openairdocs.org/aircraft/N4556W): [Versaair Services LLC](https://openairdocs.org/faa-owner/VERSAAIR%20SERVICES%20LLC), [Overland Park, KS](https://openairdocs.org/faa-place/KS/Overland%20Park), built 1991, S/N 401-0817
- [N60057](https://openairdocs.org/aircraft/N60057): [Sunflower Aero Inc](https://openairdocs.org/faa-owner/SUNFLOWER%20AERO%20INC), [Atwood, KS](https://openairdocs.org/faa-place/KS/Atwood), built 1994, S/N 401-0951
- [N619BB](https://openairdocs.org/aircraft/N619BB): [Over And Under Flying Service DBA](https://openairdocs.org/faa-owner/OVER%20AND%20UNDER%20FLYING%20SERVICE%20DBA), [Knox, IN](https://openairdocs.org/faa-place/IN/Knox), S/N 401-0916
- [N73132](https://openairdocs.org/aircraft/N73132): [Headwaters Flying Service LLC](https://openairdocs.org/faa-owner/HEADWATERS%20FLYING%20SERVICE%20LLC), [Three Forks, MT](https://openairdocs.org/faa-place/MT/Three%20Forks), S/N 401-0670
- [N73135](https://openairdocs.org/aircraft/N73135): [Mccormick Royce DBA](https://openairdocs.org/faa-owner/MCCORMICK%20ROYCE%20DBA), [Seminole, TX](https://openairdocs.org/faa-place/TX/Seminole), built 1987, S/N 401-0671
- [N9156C](https://openairdocs.org/aircraft/N9156C): [Oconnor Dallas](https://openairdocs.org/faa-owner/OCONNOR%20DALLAS), [Poplar, MT](https://openairdocs.org/faa-place/MT/Poplar), built 1993, S/N 401-0898
- [N9159A](https://openairdocs.org/aircraft/N9159A): [Barajas Samuel](https://openairdocs.org/faa-owner/BARAJAS%20SAMUEL), [Mission, TX](https://openairdocs.org/faa-place/TX/Mission), S/N 401-0900
- [N9179A](https://openairdocs.org/aircraft/N9179A): [Frontier Agricultural Services Inc](https://openairdocs.org/faa-owner/FRONTIER%20AGRICULTURAL%20SERVICES%20INC), [Calexico, CA](https://openairdocs.org/faa-place/CA/Calexico), built 1993, S/N 401-0904
- [N9179N](https://openairdocs.org/aircraft/N9179N): [Williams Delbert D](https://openairdocs.org/faa-owner/WILLIAMS%20DELBERT%20D), [Goldfield, NV](https://openairdocs.org/faa-place/NV/Goldfield), built 1989, S/N 401-0897
- [N9185X](https://openairdocs.org/aircraft/N9185X): [Wilbur-Ellis Co](https://openairdocs.org/faa-owner/WILBUR-ELLIS%20CO), [Salinas, CA](https://openairdocs.org/faa-place/CA/Salinas), built 1993, S/N 401-0910
- [N9186J](https://openairdocs.org/aircraft/N9186J): [Swancutt Aviation Inc](https://openairdocs.org/faa-owner/SWANCUTT%20AVIATION%20INC), [Chester, IA](https://openairdocs.org/faa-place/IA/Chester), built 1993, S/N 401-0912
- [N9187V](https://openairdocs.org/aircraft/N9187V): [Plu'S Flying Service Inc](https://openairdocs.org/faa-owner/PLU'S%20FLYING%20SERVICE%20INC), [Ekalaka, MT](https://openairdocs.org/faa-place/MT/Ekalaka), S/N 401-0907
- [N9188B](https://openairdocs.org/aircraft/N9188B): [Tlc Flying Inc](https://openairdocs.org/faa-owner/TLC%20FLYING%20INC), [Colfax, WA](https://openairdocs.org/faa-place/WA/Colfax), built 1993, S/N 401-0899
- [N9190Q](https://openairdocs.org/aircraft/N9190Q): [Dodson International Parts Inc](https://openairdocs.org/faa-owner/DODSON%20INTERNATIONAL%20PARTS%20INC), [Rantoul, KS](https://openairdocs.org/faa-place/KS/Rantoul), built 1989, S/N 401-0925
- [N9192B](https://openairdocs.org/aircraft/N9192B): [Kracke Spraying Service Inc](https://openairdocs.org/faa-owner/KRACKE%20SPRAYING%20SERVICE%20INC), [Fargo, ND](https://openairdocs.org/faa-place/ND/Fargo), built 1993, S/N 401-0929
- [N9197Q](https://openairdocs.org/aircraft/N9197Q): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1994, S/N 401-0943
- [N9197V](https://openairdocs.org/aircraft/N9197V): [A+ Aviation Services LLC](https://openairdocs.org/faa-owner/A+%20AVIATION%20SERVICES%20LLC), [Goodland, KS](https://openairdocs.org/faa-place/KS/Goodland), built 1994, S/N 401-0944

## NTSB investigations (88, newest 50)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN25LA191](https://openairdocs.org/ntsb/CEN25LA191), Jun 2, 2025: Air Tractor AT-401 (N60057), Hamlet, NE, substantial damage. Probable cause: The pilot's failure to maintain clearance from the power lines during low altitude maneuvering.
- [NTSB CEN23LA347](https://openairdocs.org/ntsb/CEN23LA347), Aug 3, 2023: Air Tractor AT-401 (N6015W), Jamestown, ND, substantial damage. Probable cause: The pilot’s failure to maintain proper airspeed after liftoff, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall.
- [NTSB CEN22LA157](https://openairdocs.org/ntsb/CEN22LA157), Mar 26, 2022: Air Tractor AT-401 (N9192E), Rayville, LA, substantial damage. Probable cause: A loss of engine power for a reason that could not be determined based on available information.
- [NTSB CEN21LA319](https://openairdocs.org/ntsb/CEN21LA319), Jul 13, 2021: Air Tractor AT-401 (N7315P), Carroll, IA, substantial damage. Probable cause: The wear-related failure of the airframe fuel boost pump, which resulted in fuel starvation and a loss of engine power.
- [NTSB CEN20CA311](https://openairdocs.org/ntsb/CEN20CA311), Jul 27, 2020: Air Tractor AT 401 (N9190Q), Burlington, CO, substantial damage. Probable cause: The pilot’s failure to maintain clearance from guy-wires during low-altitude agricultural operations.
- [NTSB CEN15LA345](https://openairdocs.org/ntsb/CEN15LA345), Aug 5, 2015: Air Tractor AT 401 (N1539U), Nekoosa, WI, substantial damage. Probable cause: The pilot’s inadequate preflight planning, which resulted in his attempt to take off for the agricultural application flight with the airplane over its maximum gross weight in high-density altitude…
- [NTSB GAA15CA117](https://openairdocs.org/ntsb/GAA15CA117), Jun 9, 2015: Air Tractor AT 401 (N4549E), Wall, SD, substantial damage. Probable cause: The pilot's failure to adjust the airplane's useful load to compensate for the high temperature, which resulted in an insufficient climb rate to clear surrounding terrain, and a runway excursion.
- [NTSB CEN14LA450](https://openairdocs.org/ntsb/CEN14LA450), Aug 24, 2014: Air Tractor AT-401 (N91968), Natchez, LA, destroyed. Probable cause: The loss of power due to the failure of the No. 2 exhaust valve and rocker boss during takeoff.
- [NTSB CEN14LA439](https://openairdocs.org/ntsb/CEN14LA439), Aug 19, 2014: Air Tractor AT-401 (N4542W), Wray, CO, substantial damage. Probable cause: A loss of the No. 1 cylinder’s compression due to a stuck exhaust valve caused by a lack of sufficient valve clearance, which resulted in a loss of engine power and a forced landing. Contributing to…
- [NTSB WPR14CA002](https://openairdocs.org/ntsb/WPR14CA002), Oct 1, 2013: Air Tractor AT 401 (N1013R), Waco, TX, substantial damage. Probable cause: The pilot’s failure to maintain directional control during the takeoff in gusting wind conditions.
- [NTSB CEN13LA152](https://openairdocs.org/ntsb/CEN13LA152), Jan 31, 2013: Air Tractor AT-401 (N9190B), Victoria, TX, substantial damage. Probable cause: The mechanical failure of the engine power section, which resulted in a loss of engine power.
- [NTSB CEN12LA344](https://openairdocs.org/ntsb/CEN12LA344), Jun 4, 2012: Air Tractor AT401 (N4547Q), Kenmare, ND, substantial damage. Probable cause: The pilot's failure to maintain directional control during an aborted takeoff.
- [NTSB WPR11LA386](https://openairdocs.org/ntsb/WPR11LA386), Aug 16, 2011: Air Tractor AT-401 (N1012T), Hardin, MT, substantial damage. Probable cause: The loss of engine power during takeoff due to the fatigue failure of the turbine wheel blades, which resulted from inadequate maintenance and inspections.
- [NTSB CEN10LA503](https://openairdocs.org/ntsb/CEN10LA503), Aug 26, 2010: Air Tractor AT-401 (N4530L), Castroville, TX, substantial damage. Probable cause: A loss of engine power due to the failure of the torque sensor bearing.
- [NTSB CEN10LA420](https://openairdocs.org/ntsb/CEN10LA420), Jul 21, 2010: Air Tractor AT-401 (N45297), Toulin, IL, substantial damage. Probable cause: A partial loss of engine power as a result of a cracked cylinder and the reduced visibility due to the oil-covered windshield.
- [NTSB CHI08CA213](https://openairdocs.org/ntsb/CHI08CA213), Aug 12, 2008: Air Tractor AT-401 (N45029), Ida Grove, IA, substantial damage. Probable cause: A failure of the turbocharger blower which resulted in the partial loss of power. Factors associated with the accident were the low altitude of the airplane and the embankment.
- [NTSB CHI08CA220](https://openairdocs.org/ntsb/CHI08CA220), Jul 26, 2008: Air Tractor AT-401 (N9193F), Lake View, IA, substantial damage. Probable cause: The pilot not obtaining/maintaining altitude/clearance from the power line while performing an aerial application maneuver.
- [NTSB DFW08CA146](https://openairdocs.org/ntsb/DFW08CA146), May 16, 2008: Air Tractor 401-0860 (N15420), Mumford, TX, substantial damage. Probable cause: A total loss of engine power for undetermined reasons.
- [NTSB LAX08CA034](https://openairdocs.org/ntsb/LAX08CA034), Dec 6, 2007: Air Tractor AT-401 (N6024M), Soledad, CA, destroyed. Probable cause: The pilot's failure to maintain an adequate clearance from mountainous terrain while maneuvering during an aerial application mission. Contributing to the accident was the pilot's diverted attention…
- [NTSB DFW07LA138](https://openairdocs.org/ntsb/DFW07LA138), Jun 6, 2007: Air Tractor AT-401 (N92PK), Oak Grove, LA, substantial damage. Probable cause: A complete loss of power due to failure of the impeller drive gear train and displacement of the blower spring drive mechanism, which resulted in seizure of the propeller shaft/crankshaft. Also…
- [NTSB DFW06CA152](https://openairdocs.org/ntsb/DFW06CA152), Jun 3, 2006: Air Tractor AT-401 (N9190B), Victoria, TX, substantial damage. Probable cause: The pilot's delay in aborting the takeoff which resulted in an overrun. A contributing factor was the unfavorable wind.
- [NTSB DFW06CA149](https://openairdocs.org/ntsb/DFW06CA149), Jun 1, 2006: Air Tractor AT-401 (N7318C), Garden City, TX, substantial damage. Probable cause: The pilot's improper in-flight planning resulting in the loss of engine power due to fuel exhaustion. A contributing factor was the lack of suitable terrain for the forced landing.
- [NTSB DFW05IA222](https://openairdocs.org/ntsb/DFW05IA222), Aug 19, 2005: Air Tractor AT-401 (N4545W), Winnie, TX, incident, minor damage. Probable cause: The loss of engine power due to the failure of the second-stage turbine wheel as a result of low cycle fatigue.
- [NTSB LAX05LA085](https://openairdocs.org/ntsb/LAX05LA085), Feb 4, 2005: Air Tractor AT-401 (N4530L), Calexico, CA, substantial damage. Probable cause: a loss of directional control due to a jammed rudder pedal, which prevented the pilot from exercising full rudder control authority.
- [NTSB FTW04LA179](https://openairdocs.org/ntsb/FTW04LA179), Jul 10, 2004: Air Tractor AT-401 (N10061), Winnsboro, LA, substantial damage. Probable cause: The pilot's mismanagement of fuel resulting in fuel starvation. A contributing factor was the ditch.
- [NTSB FTW04LA130](https://openairdocs.org/ntsb/FTW04LA130), May 19, 2004: Air Tractor AT-401 (N4508Y), San Angelo, TX, destroyed. Probable cause: The loss of engine power for undetermined reasons. A contributing factor was the soft terrain encountered during the aborted takeoff.
- [NTSB MIA03LA094](https://openairdocs.org/ntsb/MIA03LA094), Apr 8, 2003: Air Tractor AT- 401 (N4549N), Fellsmere, FL, destroyed. Probable cause: The poor in-flight planning by the pilot-in-command for his overhsooting the pull-up following a spray pass resulting in the in-flight collision with trees then terrain. Contributing to the accident…
- [NTSB CHI03LA095](https://openairdocs.org/ntsb/CHI03LA095), Mar 31, 2003: Air Tractor AT-401 (N45297), Knox, IN, substantial damage. Probable cause: A loss of engine power due to oil starvation as a result of the failure of the master rod bearing. Contributing factors were the tree line at the edge of the field, and the unsuitable terrain.
- [NTSB FTW03LA084](https://openairdocs.org/ntsb/FTW03LA084), Jan 14, 2003: Air Tractor AT-401 (N1537R), Alamo, TX, substantial damage. Probable cause: The pilot's failure to maintain airspeed which resulted in a stall. Low altitude flight is a contributing factor.
- [NTSB FTW02LA245](https://openairdocs.org/ntsb/FTW02LA245), Aug 30, 2002: Air Tractor AT-401 (N9193Y), Hearne, TX, substantial damage. Probable cause: The pilot's failure to maintain clearance with a pump rig while maneuvering during an aerial application flight. A factor was the object.
- [NTSB LAX02LA034](https://openairdocs.org/ntsb/LAX02LA034), Nov 30, 2001: Air Tractor AT-401B (N9186J), Las Vegas, NV, no damage. Probable cause: the failure of the AT-401 pilot to maintain clearance with the AT-402 airplane during landing. Contributing factors were the unreliable communication radio in the AT-401, the AT-401 pilot's continued…
- [NTSB ATL01LA099](https://openairdocs.org/ntsb/ATL01LA099), Aug 28, 2001: Air Tractor AT-401 (N91922), Batesville, MS, destroyed. Probable cause: The loss of engine power for undetermined reasons. A factor was the lack of suitable terrain for an emergency landing.
- [NTSB FTW01LA178](https://openairdocs.org/ntsb/FTW01LA178), Aug 9, 2001: Air Tractor AT-401 (N10140), Grand Coteau, LA, substantial damage. Probable cause: the loss of engine power while maneuvering, which resulted from a fractured #4 cylinder head at the exhaust valve rocker arm boss. A contributing factor was the lack of suitable terrain for the…
- [NTSB CHI01IA246](https://openairdocs.org/ntsb/CHI01IA246), Jul 27, 2001: Air Tractor AT-401 (N4553K), Kenesaw, NE, incident, minor damage. Probable cause: The propeller blade fatigue leading to its tip separating during an aerial application. Factors were no suitable terrain for an emergency landing, high vegetation, and soft terrain encountered during…
- [NTSB CHI01LA195](https://openairdocs.org/ntsb/CHI01LA195), Jul 2, 2001: Air Tractor AT-401 (N4549E), Ellinwood, KS, substantial damage. Probable cause: The pilot failed to see and avoid the guy wire during an aerial application flight. A factor associated with the accident was the guy wire.
- [NTSB CHI01LA135](https://openairdocs.org/ntsb/CHI01LA135), May 12, 2001: Air Tractor AT-401 (N1008Q), Warsaw, IL, substantial damage. Probable cause: the rocker assembly failure during low level maneuvering. Factors were the soft and sandy terrain and the unsuitable terrain the pilot encountered during the forced landing.
- [NTSB FTW00LA212](https://openairdocs.org/ntsb/FTW00LA212), Jul 18, 2000: Air Tractor AT-401 (N6055W), Panhandle, TX, destroyed, 1 fatal. Probable cause: The pilot's failure to maintain airspeed, which resulted in a stall.
- [NTSB LAX00LA271](https://openairdocs.org/ntsb/LAX00LA271), Jul 13, 2000: Air Tractor AT-401 (N4508Y), Ripley, CA, substantial damage. Probable cause: A loss of engine power due to the separation of a connecting rod from the crankshaft.
- [NTSB SEA00LA073](https://openairdocs.org/ntsb/SEA00LA073), Apr 14, 2000: Air Tractor AT-401 (N1524H), Acequia, ID, substantial damage. Probable cause: The pilot's failure to obtain/maintain adequate clearance with the irrigation system during initial climb. A contributing factor was the irrigation pivot.
- [NTSB FTW00LA074](https://openairdocs.org/ntsb/FTW00LA074), Jan 25, 2000: Air Tractor AT-401 (N91968), Rayville, LA, substantial damage. Probable cause: The loss of engine power due to a crack in the #6 cylinder. A factor was the lack of suitable terrain for the forced landing.
- [NTSB ATL99LA129](https://openairdocs.org/ntsb/ATL99LA129), Sep 13, 1999: Air Tractor AT-401 (N45205), Caledonia, MS, substantial damage. Probable cause: The failure of the fuel control gear train due to oil contamination. A factor was Inadequate maintenance.
- [NTSB FTW99LA239](https://openairdocs.org/ntsb/FTW99LA239), Aug 25, 1999: Air Tractor AT-401 (N15119), Hart, TX, substantial damage. Probable cause: The pilot's failure to maintain clearance with power lines.
- [NTSB FTW99LA220](https://openairdocs.org/ntsb/FTW99LA220), Aug 12, 1999: Air Tractor AT-401 (N1031Q), Humphrey, AR, substantial damage. Probable cause: Fuel exhaustion as a result of the pilot's failure to refuel the airplane.
- [NTSB MIA99LA212](https://openairdocs.org/ntsb/MIA99LA212), Aug 2, 1999: Air Tractor AT-401 (N15585), Moore Haven, FL, substantial damage. Probable cause: The pilot exceeding the gross takeoff weight which reduced the climb capability and subsequent in-flight collision with terrain. Contributing to the accident was the high temperature and the pilot's…
- [NTSB SEA99LA075](https://openairdocs.org/ntsb/SEA99LA075), May 27, 1999: Air Tractor AT-401 (N6024M), Jerome, ID, substantial damage. Probable cause: Fuel exhaustion. Carburetor contamination and rough terrain were factors.
- [NTSB FTW99FA004](https://openairdocs.org/ntsb/FTW99FA004), Oct 8, 1998: Air Tractor AT-401 (N4531M), Newellton, LA, substantial damage, 1 fatal. Probable cause: The pilot's failure to maintain aircraft control during an inadvertent entry into adverse weather conditions. A related factor was the fog.
- [NTSB CHI98LA355](https://openairdocs.org/ntsb/CHI98LA355), Aug 28, 1998: Air Tractor AT-401 (N4543F), N. Ottawa Twp., MN, destroyed. Probable cause: A loss of engine power due to a worn piston ring. A related factor was the owner exceeded the manufacturer's recommended engine overhaul.
- [NTSB ATL98LA117](https://openairdocs.org/ntsb/ATL98LA117), Aug 22, 1998: Air Tractor 401 (N10103), Holly Bluff, MS, substantial damage. Probable cause: The malfunction of the carburetor which resulted in improper fuel flow to the engine.
- [NTSB MIA98LA228](https://openairdocs.org/ntsb/MIA98LA228), Aug 21, 1998: Air Tractor AT401 (N1013Z), Ruleville, MS, destroyed. Probable cause: A fire of undetermined origin.
- [NTSB MIA98LA181](https://openairdocs.org/ntsb/MIA98LA181), May 24, 1998: Air Tractor AT-401 (N1008Y), Rich, MS, substantial damage. Probable cause: a loss of engine power for an undetermined reason, resulting in a forced landing and subsequent impact with rough terrain.

All 88: https://openairdocs.org/model/air-tractor-at-401/ntsb.md

## FAA accident and incident reports (112, newest 50)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20250602004849A](https://openairdocs.org/incident/20250602004849A), Jun 2, 2025: Air Tractor Inc AT-401 (N60057), Hamlet, NE, Substantial damage. While conducting agricultural operations, the aircraft stuck a set of transmision power lines. Three power lines damaged the prop, windshield frame, horizontal…
- [Accident 20230803011709A](https://openairdocs.org/incident/20230803011709A), Aug 3, 2023: Air Tractor Inc AT-401 (N6015W), Jamestown, ND, Substantial damage. The pilot was attempting to take off from a private grass runway with an aircraft/engine combination he was unfamiliar with. The pilot stated that he failed to…
- [Incident 20220501002239I](https://openairdocs.org/incident/20220501002239I), May 1, 2022: Air Tractor Inc AT-401 (N1548L), Obion, TN, Minor damage. Pilot was spraying a wheat field in his AT-401. He was between 8 and 10 feet AGL going between 90 and 100KTS. He had 41 min of fuel remaining and 250 gal of…
- [Accident 20220326003879A](https://openairdocs.org/incident/20220326003879A), Mar 26, 2022: Air Tractor Inc AT-401 (N9192E), Rayville, LA, Substantial damage. The airman was performing an aerial application when on his last pass the aircraft engine started spiting and sputtering. The airman exited the field and…
- [Accident 20210713017929A](https://openairdocs.org/incident/20210713017929A), Jul 13, 2021: Air Tractor Inc AT-401 (N7315P), Carroll, IA, Substantial damage. During aerial application operations, the pilot was coming out of a turn when he experienced an immdeiate and total loss of engine power. Remainder of chemical…
- [Accident 20200727008399A](https://openairdocs.org/incident/20200727008399A), Jul 27, 2020: Air Tractor Inc AT-401 (N9190Q), Burlington, CO, Destroyed. Prior to aerial application, PIC stated that he performed several passes over the area to survey waypoints and search for obstacles. PIC noted the tower…
- [Incident 20190617007199I](https://openairdocs.org/incident/20190617007199I), Jun 17, 2019: Air Tractor Inc AT-401 (N1013S), Langdon, ND, Minor damage. Monday June 17th at approximately 1:30 pm, pilot reported an engine failure 15 miles west and 1/2 mile south of Langdon, Nd. The pilot was forced to land in a…
- [Incident 20170522006849I](https://openairdocs.org/incident/20170522006849I), May 22, 2017: Air Tractor Inc AT-401 (N1558Y), Stuttgart, AR, Minor damage. On may 22, 2017 at 1240 CST, an Air tractor AT-104, N1558Y, owned and registered to a certificated agricultural operator and piloted by the commercial rated…
- [Accident 20150805014859A](https://openairdocs.org/incident/20150805014859A), Aug 5, 2015: Air Tractor Inc AT-401 (N1539U), Nekoosa, WI, Substantial damage. Pilot stated on takeoff roll, aircraft tail came up then settled but continued take off to rotation. Aircraft settled to ground departing ground effect.…
- [Accident 20150609008669A](https://openairdocs.org/incident/20150609008669A), Jun 9, 2015: Air Tractor Inc AT-401 (N4549E), Wall, SD, Substantial damage. On June 9, 2015, at 1630 an Air tractor (AT-401) registered to cedar butte Air inc., was involved in an accident while taking-off from a Grass strip for the…
- [Accident 20140824015459A](https://openairdocs.org/incident/20140824015459A), Aug 24, 2014: Air Tractor Inc AT-401 (N91968), Natchitoches, LA, Destroyed. On climb out pilot experienced large ?pop? And smoke from engine. Started back to strip, dumped load and crashed. Pilot got out and plane caught fire.
- [Accident 20140819015309A](https://openairdocs.org/incident/20140819015309A), Aug 19, 2014: Air Tractor Inc AT-401 (N4542W), Wray, CO, Substantial damage. On 08/19/2014 at 0745 MDT, N4542W, an Air tractor AG-401 restricted airworthiness airplane flipped on landing in a field after power loss. The sole commercial…
- [Incident 20140708017039I](https://openairdocs.org/incident/20140708017039I), Jul 8, 2014: Air Tractor Inc AT-401 (N9159A), Weslaco, TX, Minor damage. On July 8, 2014, at approximately 15:05 hours, an Air tractor, AT-401, N9159A owned by barajas inc. and operated by moad aviation inc., crashed near donna, TX.…
- [Accident 20131001025709A](https://openairdocs.org/incident/20131001025709A), Oct 1, 2013: Air Tractor Inc AT-401 (N1013R), Waco, TX, Substantial damage. Pilot encountered turbulence/windshear on take off. Wing contacted ground and aircraft nosed over. Pilot departed aircraft uninjured.
- [Accident 20130131004359A](https://openairdocs.org/incident/20130131004359A), Jan 31, 2013: Air Tractor Inc AT-401 (N9190B), Victoria, TX, Substantial damage. Pilot stated he departed private strip. 8 to 10 min. In to the flight the engine started running rough like a dead miss, checked mags no difference. Problem…
- [Accident 20120604011049A](https://openairdocs.org/incident/20120604011049A), Jun 4, 2012: Air Tractor Inc AT-401 (N4547Q), Kenmare, ND, Substantial damage. During takeoff pilot aborted approx 1900 feet down a 3700 foot runway with a load of chemical. The pilot reported no mechanical problems with aircraft and that…
- [Accident 20110816018769A](https://openairdocs.org/incident/20110816018769A), Aug 16, 2011: Air Tractor Inc AT-401 (N1012T), Hardin, MT, Substantial damage. Turbine engine failed shortly after take off. Pilot made an emergency landing,the aircraft right wing caught in the crop and caused the aircraft to nose into…
- [Incident 20110806021109I](https://openairdocs.org/incident/20110806021109I), Aug 6, 2011: Air Tractor Inc AT-401 (N9190N), Kearney, NE, Minor damage. Engine lost power shortly after take-off and quit. Investigation found small metal pieces in the exhaust stack, indicating an internal engine failure. Engine…
- [Incident 20110729017659I](https://openairdocs.org/incident/20110729017659I), Jul 29, 2011: Air Tractor Inc AT-401 (N45332), Baskin, LA, No damage. Aircraft was in cruise flight performing aerial application when the aircraft developed a severe vibration due to a stuck exhaust valve in the cylinder…
- [Incident 20110716014239I](https://openairdocs.org/incident/20110716014239I), Jul 16, 2011: Air Tractor Inc AT-401 (N1558Y), Plattsmouth, NE, Minor damage. On 07/16/2011, received notice of an aircraft incident involving an AT-401, N1558Y. Arriving on scene approximately 1 mile south and 2 ¼ west of murray,…
- [Incident 20110218009119I](https://openairdocs.org/incident/20110218009119I), Feb 18, 2011: Air Tractor Inc AT-401 (N1013F), Shreveport, LA, Minor damage. While on approach to landing on the operators grass strip, the aircraft landing gear tires struck a car traveling on the public road running past the end of…
- [Incident 20110218001969I](https://openairdocs.org/incident/20110218001969I), Feb 18, 2011: Air Tractor AT-401 (N1558Y), Pioneer, LA, Minor damage. With a load of fertilizer, on take off roll after 100 yards the right main landing gear tire blew out. The right main wheel dug into the ground causing the…
- [Accident 20100826043649A](https://openairdocs.org/incident/20100826043649A), Aug 26, 2010: Air Tractor AT-401 (N4530L), Castroville, TX, Substantial damage. During aerial application the engine lost power. Pilot landed aircraft on adjacent field and struck some trees causing major damage to the wings. No other…
- [Accident 20100721039479A](https://openairdocs.org/incident/20100721039479A), Jul 21, 2010: Air Tractor AT-401 (N45297), Bradford, IL, Substantial damage. During aerial application the aircraft lost power at approximetly 200-300 feet AGL. The pilot was able to maneuver the aircraft to an unidentified airstrip…
- [Accident 20080812843809A](https://openairdocs.org/incident/20080812843809A), Aug 12, 2008: Airtrc AT401 (N45029), Ida Grove, IA, Destroyed. (-23) Pilot took off to the northwest from idg, began a right hand turn toward rising terrain and started to lose manifold pressure and RPM. Aircraft lost…
- [Accident 20080727843869A](https://openairdocs.org/incident/20080727843869A), Jul 27, 2008: Airtrc AT401 (N9193F), Lakeview, IA, Destroyed. (-23) Pilot was spraying and came into contact with power lines and crashed into a field.
- [Accident 20080517836149A](https://openairdocs.org/incident/20080517836149A), May 17, 2008: Airtrc AT401 (N15420), Mumford, TX, Substantial damage. (-23) The pilot was in the top of a turn when the engine started shaking real bad and was losing power. Pilot scanned engine instruments and noticed the chip…
- [Accident 20071206828499A](https://openairdocs.org/incident/20071206828499A), Dec 6, 2007: Airtrc AT401 (N6024M), King City, CA, Destroyed. (-23) The pilot [privacy data omitted] stated he was starting his second pass of the aerial application flight, when he became distracted setting up his "GPS…
- [Accident 20070606012229A](https://openairdocs.org/incident/20070606012229A), Jun 6, 2007: Airtrc AT401 (N92PK), Oak Grove, LA, Substantial damage. (-23) Engine lost power during turn-around maneuver at end of spraying pass and aircraft made an emergency landing in open field and became inverted after…
- [Incident 20070206002109I](https://openairdocs.org/incident/20070206002109I), Feb 6, 2007: Airtrc AT401 (N9190B), Victoria, TX, Minor damage. (-23) The operator was going to spray a field approximately 1.5 miles from his home strip. He had loaded 250 gallons of chemical and 45 gallons of avgas on his…
- [Accident 20060603011009A](https://openairdocs.org/incident/20060603011009A), Jun 3, 2006: Airtrc AT401 (N9190B), Victoria, TX, Substantial damage. (-23) After engine run-up operator attempted to take off from wet gravel runway with zero wind. Aircraft became airborne for approximately 15 feet then failed…
- [Accident 20060601008109A](https://openairdocs.org/incident/20060601008109A), Jun 1, 2006: Airtrc AT401 (N7318C), Garden City, TX, Substantial damage. (-23) On June 1, 2006, N7318C, an air tractor model AT-401 aircraft, ran out of fuel during a flight test and subsequently made a forced landing on a cotton…
- [Incident 20051107027179I](https://openairdocs.org/incident/20051107027179I), Nov 7, 2005: Airtrc AT401 (N9186J), Broken Bow, NE, Minor damage. (-23) On November 7, 2005, the pilot [privacy data omitted] was spraying a field 8 nautical miles east of Broken Bow, Nebraska, when he struck a power line…
- [Incident 20050819020459I](https://openairdocs.org/incident/20050819020459I), Aug 19, 2005: Airtrc AT401 (N4545W), Winnie, TX, Minor damage. (-23) 08/19/2005, 0815 Hrs, air tractor, model AT-401, N4545W, s/n 401-0790 departed Winnie/stowall airport, T90, on runway 17. Flight was enroute to wharton…
- [Incident 20050802022319I](https://openairdocs.org/incident/20050802022319I), Aug 2, 2005: Airtrc AT401 (N9185X), Aledo, IL, Minor damage. (-23) [privacy data omitted] pilot in command (PIC) stated he landed on rwy 35 at Aledo, IL with excess airspeed and touched down farther down the runway than…
- [Incident 20050608021469I](https://openairdocs.org/incident/20050608021469I), Jun 8, 2005: Airtrc AT401 (N15439), Edmore, ND, Minor damage. (-23) Upon landing, aircraft tipped over due to park brake being partially engaged. Minor damage to prop, left wing tip, windshield, and vertical fin.
- [Accident 20050204007329A](https://openairdocs.org/incident/20050204007329A), Feb 4, 2005: Airtrc AT401 (N4530L), Calexico, CA, Substantial damage. (-23) On feb. 4, 2005, at 1300 PST, an air tractor AT-401, N4530L, attempted to land at johnsons Brothers airport (61CL). The aircraft was empty. As the acft…
- [Accident 20040710013979A](https://openairdocs.org/incident/20040710013979A), Jul 10, 2004: Airtrc AT401 (N10061), Winnsboro, LA, Substantial damage. (-23) Pilot was spraying a field near Winnsboro, Louisiana when his engine quit. Pilot explained that he was race tracking I.e. (making constant left hand…
- [Accident 20040519016339A](https://openairdocs.org/incident/20040519016339A), May 19, 2004: Airtrc AT401 (N4508Y), San Angelo, TX, Substantial damage. (-23) On may 19, 2004, approximately 0700 CDT, an air tractor AT-401 N4508Y sustained substantial damage when it crashed following a loss of power during…
- [Accident 20030408018159A](https://openairdocs.org/incident/20030408018159A), Apr 8, 2003: Airtrc AT401 (N4549N), Fellsmore, FL, Substantial damage. (-23) The pilot states in interview that he does not remember anything about the accident. The last thing he remembers is loading the aircraft, then waking up…
- [Accident 20030331005589A](https://openairdocs.org/incident/20030331005589A), Mar 31, 2003: Airtrc AT401 (N45297), Knox, IN, Substantial damage. (-23) Pilot was flight testing aircraft after new engine was installed. Pilot reported loss of oil pressure and engine power. A/c landed in corn field and…
- [Accident 20030114002309A](https://openairdocs.org/incident/20030114002309A), Jan 14, 2003: Airtrc AT401 (N1537R), Alamo, TX, Destroyed. (-23) On January 14, 2003, agricultural aircraft N1537R, an airtractor, model AT-401, was substantially damaged following a loss of control while maneuvering…
- [Accident 20020830022259A](https://openairdocs.org/incident/20020830022259A), Aug 30, 2002: Airtrc AT401 (N9193Y), Hearne, TX, Destroyed. (.19) On August 30, 2002, approximately 1330 central daylight time, an air tractor 401 agricultural airplane, N9193Y, was destroyed when it impacted an oil…
- [Incident 20020810027399I](https://openairdocs.org/incident/20020810027399I), Aug 10, 2002: Airtrc AT401 (N401TH), Oxford, NE, Minor damage. (-23) On August 10, 2002, at approximately 1200 CDT, air tractor AT-401, N401TH, experienced minor damage following an emergency landing on a dirt road 4 miles…
- [Incident 20020620022499I](https://openairdocs.org/incident/20020620022499I), Jun 20, 2002: Airtrc AT401 (N1558Y), Monroe, LA, Minor damage. (-23) On June 20, 2002 at 8:21 a.m., Mr. Frederick p. mulhern made an emergency landing at Monroe Regional Airport at Monroe, Louisiana. The pilot was not…
- [Accident 20011130036431A](https://openairdocs.org/incident/20011130036431A), Nov 30, 2001: Airtrc AT401 (N9186J), Las Vegas, NV, No damage. (-23) Aircraft was one in a flight of three. PIC of this aircraft overtook and struck another aircraft in his flight during the landing phase and then touched…
- [Accident 20010828023619A](https://openairdocs.org/incident/20010828023619A), Aug 28, 2001: Airtrc AT401 (N91922), Batesville, MS, No damage. (.19) On August 28, 2001, at 1600 central daylight time, an air tractor AT-401, N91922, collided with trees and the ground then caught fire after a complete…
- [Accident 20010809022709A](https://openairdocs.org/incident/20010809022709A), Aug 9, 2001: Airtrc AT401 (N10140), Grandcoteau, LA, No damage. (-23) Pilot made one spray pass south to north. On second pass diving in ona north to south path, engine began shaking, spraying oil, backfiring and missing.…
- [Incident 20010806021199I](https://openairdocs.org/incident/20010806021199I), Aug 6, 2001: Airtrc AT401 (N15348), Onida, SD. (-23) On August 6, 2001, N15348, an air tractor model 401, lost engine power and made a forced landing with no damage sustained. It was determined the #1…
- [Accident 20010702018889A](https://openairdocs.org/incident/20010702018889A), Jul 2, 2001: Airtrc AT401 (N4549E), Ellinwood, KS, No damage. (.19) On July 2, 2001, at 0930 central daylight time, an air tractor AT-401, N4549E, contacted a guy wire and collided with the terrain during an aerial…

All 112: https://openairdocs.org/model/air-tractor-at-401/incidents.md

## Service difficulty reports (19)

As reported by operators and repair stations, by the model named in the report.

- [SDR RZIG2014092400553](https://openairdocs.org/sdr/RZIG2014092400553), Aug 24, 2014: CYLINDER. FRACTURED. AFTER TAKEOFF NR 2 CYLINDER EXHAUST VALVE STUCK IN OPEN POSITION LETTING PISTON CONTACT VALVE, BREAKING EXHAUST ROCKER HOUSING FROM CYLINDER. ACFT LOST POWER FO
- [SDR CA140107008](https://openairdocs.org/sdr/CA140107008), Jan 7, 2014: BEARING. WORN. (CAN) WHILE CARRYING OUT VALVE CLEARANCE INSPECTION, THE EXHAUST VALVE ROCKER ARM ON THE NR 7 CYLINDER WAS FOUND WITH EXCESSIVE PLAY BOTH RADIALLY AND AXIALLY. 
- [SDR 2013FA0000205](https://openairdocs.org/sdr/2013FA0000205), Apr 1, 2013: BLADES. BROKEN. REPORTED THAT AFTER LANDING, PROPELLER SLOWED DOWN QUICKER THAN NORMAL. DURING SHUTDOWN THE PROPELLER DID NOT FEATHER AND CAME TO LOW SPEED STOP. INSPECTION OF 
- [SDR CA120828003](https://openairdocs.org/sdr/CA120828003), Aug 27, 2012: TURBOCHARGER. SEIZED. (CAN) PILOT REPORTED LOSS OF MAINIFOLD PRESSURE ON TAKEOFF MAINTENANCE FOUND THE TURBO CHARGER SEIZED.
- [SDR CA120816002](https://openairdocs.org/sdr/CA120816002), Aug 12, 2012: CYLINDER. FAILED. (CAN) INFLIGHT ENGINE FAILURE DUE INTERNAL CAM SHAFT/VALVE TRAIN FAILURE.
- [SDR CA130306008](https://openairdocs.org/sdr/CA130306008), Jun 6, 2012: BLADE. DAMAGED. (CAN) PILOT REDUCED POWER TO IDLE AT TOUCHDOWN, HE NOTED PROP RPM DECAY BELOW NORMAL. ENGINE LOW OIL PRESSURE LIGHT ILLUMINATED, PROP THEN STOPPED TURNING BUT D
- [SDR CA120601005](https://openairdocs.org/sdr/CA120601005), May 30, 2012: PUMP. FAILED. (CAN) FUEL PUMP WAS FAILED OUT OF THE BOX. THE PUMP CREATED ZERO FUEL PRESSURE.
- [SDR 2011FA0000637](https://openairdocs.org/sdr/2011FA0000637), Jul 29, 2011: EXHAUST VALVE. STUCK. ACFT DEVELOPED HEAVY VIBRATION DUE TO A STUCK EXHAUST VALVE IN THE CYLINDER ASSY.
- [SDR 2010FA0000713](https://openairdocs.org/sdr/2010FA0000713), Jun 17, 2010: ANGLE. CRACKED. THE CRACK DEVELOPED FROM THE TOP DOWN IN THE CORNER OF THE ANGLE FOR APPROX 1 INCH. IT HAS FLOWN FOR 91 HRS SINCE THE LAST INSP AT WHICH TIME NO CRACK WAS APPAR
- [SDR SWP2009F00000](https://openairdocs.org/sdr/SWP2009F00000), Jun 19, 2009: CONNECTING ROD. BROKEN. ON JUNE 12, 2009 NR 3 CONNECTING ROD BROKE CAUSING NR 3 CYL TO SEPARATE COMPLETELY FROM ENGINE. ACFT LANDED IN AN ALFALFA FIELD. ACFT DID NOT SUSTAIN ANY DAMAGE
- [SDR CA071016016](https://openairdocs.org/sdr/CA071016016), Aug 20, 2007: ENGINE. POWER LOSS. (CAN) DURING SPRAYING OPERATIONS THE ENGINE EMITTED A LOUD NOISE AND LOST POWER, RESULTING IN A FORCED LANDING.
- [SDR CA030404007](https://openairdocs.org/sdr/CA030404007), Mar 25, 2003: STRAP. BROKEN. (CAN) UPON PERFORMING THE SCHEDULED 200 HOUR INSTALLATION INSPECTION, THE HOSE STRAP WAS FOUND TO BE BROKEN NEAR THE MOUNTING BOLT HOLE. THE BROKEN HOSE STRAP W
- [SDR CA030404006](https://openairdocs.org/sdr/CA030404006), Mar 25, 2003: HARNESS. DAMAGED. (CAN) UPON PERFORMING THE SCHEDULED 200 HOUR ENGINE INSPECTION, THE IGNITION HARNESS ASSEMBLY WAS FOUND TOBE DAMAGED DUE TO EXCESSIVE HEAT. THE DAMAGE WAS LOCAT
- [SDR 2002FA0001376](https://openairdocs.org/sdr/2002FA0001376), Dec 6, 2002: NUT. CRACKED. A NEWLY OVERHAULED "0" TIME PROPELLER WAS INSTALLED 05/31/01. DURING MAINTENANCE JULY 5, 2002 THE PROPELLER HAD TO BE REMOVED TO FACILITATE OTHER WORK. DURING T
- [SDR 2002FA0001375](https://openairdocs.org/sdr/2002FA0001375), Dec 6, 2002: NUT. CRACKED. A NEWLY OVERHAULED "0" TIME PROPELLER WAS INSTALLED 05/31/01. DURING MAINTENANCE JULY 5, 2002 THE PROPELLER HAD TO BE REMOVED TO FACILITATE OTHER WORK. DURING T
- [SDR CA001218020](https://openairdocs.org/sdr/CA001218020), Oct 15, 2000: ATTACH ANGLE. CRACKED. (CAN) CRACKS FOUND IN 90 DEGREES RADIUS OF UPPER ATTACH ANGLES. LOWER ATTACH ANGLES CRACKS FOUND ON FUSELAGE ATTACH POINT.
- [SDR 20000809SH002](https://openairdocs.org/sdr/20000809SH002), Jul 13, 2000: ROD. FRACTURED. DURING AGRICULTURAL SPRAYING OPERATION, NR 7 ROD ASSY FAILED FORCING AIRCRAFT TO EMERGENCY LANDING AND SUBSEQUENT SUBSTANTIAL AIRCRAFT DAMAGE. REF: ACCIDENT REP
- [SDR 20000613SH003](https://openairdocs.org/sdr/20000613SH003), May 15, 2000: ATTACH FITTING. CORRODED. INTERNAL CORROSION CAUSED FAILURE OF HORIZONTAL STABILIZER STRUT AT LOWER ATTACH FITTING. SUBMITTER RECOMMENDED LOWER ATTACH POINT DESIGNED SIMILAR TO UPPER FIT
- [SDR AU960373](https://openairdocs.org/sdr/AU960373), Mar 12, 1996: ANGLE. CRACKED. (AUS) WING ATTACHMENT ANGLES (2OFF) CRACKED ON INSIDE FACE AND CORRODED AROUND MOUNT HOLES AND LOWER HOLES

## STCs that may be installed (OpenAirDocs) (60, first 50)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SA01800SE](https://openairdocs.org/stc/SA01800SE): Fabrication and installation of new or replacement of existing instrument panel lights dimmer control. TCW Technologies, LLC
- [STC SA01861SE](https://openairdocs.org/stc/SA01861SE): Fabrication and installation of Landing Light Controller. TCW Technologies, LLC
- [STC SA04837NY](https://openairdocs.org/stc/SA04837NY): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights. AeroLED's Holdings, LLC
- [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc
- [STC SA09719AC](https://openairdocs.org/stc/SA09719AC): Installation electrostatic spray equipment and controls. Zee Systems Inc
- [STC SA12204WI](https://openairdocs.org/stc/SA12204WI): Wing Spar Cap manufacturing process change. Air Tractor Inc
- [STC SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc
- [STC SA04046CH PAGE 1](https://openairdocs.org/stc/SA04046CH%20PAGE%201): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc
- [STC SA01240SE](https://openairdocs.org/stc/SA01240SE): Installation of secondary voltage indication system. Visual Instruments LLC
- [STC SA04676CH](https://openairdocs.org/stc/SA04676CH): Installation of a True Quantity Gauge System. Reabe Design LLC
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc
- [STC SA02266SE](https://openairdocs.org/stc/SA02266SE): Installation of a Lever Throttle Quadrant. Kawak Aviation Technologies Inc
- [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC
- [STC SA00888SE](https://openairdocs.org/stc/SA00888SE): Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and an Avia V508-E-AG 106/A propeller per the Master Drawing List and Installation Instructions given in Approved Model List SA00888SE. (Note: Prior to July 17, 2002, the model M601-E11S engine was designated as the model M601-E11 engine). Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller per Cascade Flying Service Master Drawing List CFS-MDL-0001 Rev G, dated June 15, 2004, and Cascade Flying Service Document CFS-IM-107, Rev A, dated July 29, 2003, “Installation Instructions for Walter Turbine Installation on Air Tractor 300 & 400 Series Ag Aircraft,” or later FAA-approved revisions to these documents. NOTE: The Air Tractor model AT-400, AT-402B, AT-502, AT-502B, and AT-503A airplanes are not eligible for modification under option 2. Cascade Flying Service LLC
- [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation
- [STC SA5190NM](https://openairdocs.org/stc/SA5190NM): Installation of Gustin Aviation chip detector light system. A & L Aircraft Parts Inc
- [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. Garmin International Inc
- [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation
- [STC SA01435SE](https://openairdocs.org/stc/SA01435SE): Installation of J.P. Instruments (JPI) Primary Engine Data Management System. J. P. Instruments
- [STC SA01323CH](https://openairdocs.org/stc/SA01323CH): Installation of a ground single point fueling system. Turbine Conversions Ltd
- [STC SA1607GL](https://openairdocs.org/stc/SA1607GL): Installation of Sky-Tractor Model200 Scavenge oil filter system. Airwolf Filter Corp
- [STC SA02205SE](https://openairdocs.org/stc/SA02205SE): Installation of a replacement airframe fuel pump in accordance with Cascade Flying Service Master Drawing List FW-CFS545-90, Rev. B, dated October 19, 2011, or later FAA approved revision. Cascade Aircraft conversions LLC
- [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation
- [STC SA01745WI](https://openairdocs.org/stc/SA01745WI): Installation of a Cable Cutter System on the Main Landing Gear. Hershey Flying Service Inc
- [STC SA01845WI](https://openairdocs.org/stc/SA01845WI): Installation of a Center Windshield. Hershey Flying Services
- [STC SA00382BO](https://openairdocs.org/stc/SA00382BO): Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes. Avidyne Corporation
- [STC SA02276AK](https://openairdocs.org/stc/SA02276AK): Installation of AMSAFE Aviation Inflatable Restraints. AMSAFE Inc
- [STC SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc
- [STC SA02442AK PAGE 1](https://openairdocs.org/stc/SA02442AK%20PAGE%201): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC
- [STC SA00490LA](https://openairdocs.org/stc/SA00490LA): Installation of winglets. Aero Spraying Service Inc
- [STC SA02283SE PAGE 2](https://openairdocs.org/stc/SA02283SE%20PAGE%202): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P. Electronics International Inc
- [STC ST03554CH](https://openairdocs.org/stc/ST03554CH): Installation of Rotary Gatekeeper and provisions equipment. Turbine Conversions Ltd
- [STC SA02402SE PAGE 1](https://openairdocs.org/stc/SA02402SE%20PAGE%201): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C. Electronics International Inc
- [STC SA00403SE](https://openairdocs.org/stc/SA00403SE): Installation of Vortex Generators on the wings. Micro AeroDynamics Inc
- [STC SA00432SE](https://openairdocs.org/stc/SA00432SE): Installation of EGT 701 series fuel flow instrument. J P Instruments
- [STC SA00861SE](https://openairdocs.org/stc/SA00861SE): Installation of J.P. Instruments (JPI) fuel flow indicating system. J P Instruments
- [STC SA01583CH](https://openairdocs.org/stc/SA01583CH): Installation of a Trace Engines, LP OE600A model engine, McCauley 3FF34C529/106AW[X]-0 model propeller and associated systems. Trace Engines LP
- [STC SA01281CH](https://openairdocs.org/stc/SA01281CH): Installation of turbine engine and a propeller and optional instrument panel. Johnson Airspray Inc
- [STC SA02985CH](https://openairdocs.org/stc/SA02985CH): Installation of a Cool Start System in accordance with Installation Instructions , Revision A, dated April 14, 2011, or later FAA Approved revision. Turbine Conversions Ltd
- [STC SA4294SW](https://openairdocs.org/stc/SA4294SW): Installation of freon air conditioning unit (wind-driven compressor). Collins Aircraft Dynamics Inc
- [STC SA00770CH](https://openairdocs.org/stc/SA00770CH): Replace front 30 inches of fiberglass canopy top with L.P. Aero Plastics Inc. acrylic top in accordance with Reabe Aircraft Improvement Inc. Installation Instructions as listed on AML No. SA00770CH, amended January 14, 2011, or later FAA approved revisions. Reabe Aircraft Improvement Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA02110CH](https://openairdocs.org/stc/SA02110CH): Installation of a Time Trac Data Recorder. P2 Incorporated
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc
- [STC SA01639NY](https://openairdocs.org/stc/SA01639NY): Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B. Scale Modelbuilders Inc
- [STC SA01258SE](https://openairdocs.org/stc/SA01258SE): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. R-S Sales Inc
- [STC SA01295LA](https://openairdocs.org/stc/SA01295LA): Installation of modified Pratt & Whitney R-1340 engine. This mod must be done concurrently with STC SE01200LA which modifies R-1340 engine. Aircraft Cylinder & Turbine Inc
- [STC SA190CH](https://openairdocs.org/stc/SA190CH): Installation of Goodyear 29X11-10, 8 ply or 10 ply tires and 8.50X10 tubes. Reabe Aircraft Improvement Inc
- [STC SA00622LA](https://openairdocs.org/stc/SA00622LA): Installation of an electronic digital engine tachometer horizon model P-1000. Horizon Instruments Inc

All 60: https://openairdocs.org/model/air-tractor-at-401/stcs.md

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