# Air Tractor AT-400

- Type: Aircraft model (FAA registry)
- Registry code: 0390202
- Manufacturer (registry): AIR TRACTOR INC
- Model: AT-400
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Turbo-prop
- Seats: 1
- Weight class: Up to 12,499 lb
- Certification: Type certificated
- Data sheet: [TCDS A9SW](https://openairdocs.org/tcds/A9SW) (OpenAirDocs)
- Holder: Air Tractor Inc.
- Registered aircraft: 30
- Page: https://openairdocs.org/model/air-tractor-at-400

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## 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 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 2009-11-05](https://openairdocs.org/ad/2009-11-05): Cracks in the engine mount · Air Tractor AT-400, AT-400A, AT-402 and 9 more. Effective Jun 1, 2009
- [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 2008-09-10](https://openairdocs.org/ad/2008-09-10): Aluminum spar caps · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective May 8, 2008
- [AD 2005-18-20](https://openairdocs.org/ad/2005-18-20): "FASTprop" propeller de-icers · Hartzell PHC-C3YF-1RF/F8468A(B,K)-8R constant speed propeller (STC SA00718LA or 17 others). Effective Oct 14, 2005
- [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 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 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
- [AD 92-07-14](https://openairdocs.org/ad/92-07-14): Wing Structure · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective May 8, 1992
- [AD 82-06-12](https://openairdocs.org/ad/82-06-12): Main Landing Gear Struts · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective Mar 25, 1982

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 2008-10-12](https://openairdocs.org/ad/2008-10-12) (historical): Cracks in the engine mount · Air Tractor AT-400, AT-400A, AT-402 and 9 more. Effective Jun 12, 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 2003-06-01](https://openairdocs.org/ad/2003-06-01) (historical): Wing centerline splice joint · Air Tractor AT-300, AT-301, AT-302 and 2 more. Effective Apr 4, 2003
- [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) (7)

- [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-11-57](https://openairdocs.org/saib/CE-11-57): Powerplant, Engine Mount Section. Issued Sep 14, 2011
- [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
- [SAIB CE-03-57](https://openairdocs.org/saib/CE-03-57): . Issued Sep 22, 2003
- [SAIB CE-02-03](https://openairdocs.org/saib/CE-02-03): . Issued Oct 16, 2001

## Registered aircraft (30)

- [N144KS](https://openairdocs.org/aircraft/N144KS): [Aas LLC](https://openairdocs.org/faa-owner/AAS%20LLC), [Ovid, MI](https://openairdocs.org/faa-place/MI/Ovid), built 1986, S/N 400-0640
- [N2254L](https://openairdocs.org/aircraft/N2254L): [Phoenix Equipment Lc](https://openairdocs.org/faa-owner/PHOENIX%20EQUIPMENT%20LC), [Nickerson, KS](https://openairdocs.org/faa-place/KS/Nickerson), built 1985, S/N 400-0611
- [N2306A](https://openairdocs.org/aircraft/N2306A): [Blanke Jason F](https://openairdocs.org/faa-owner/BLANKE%20JASON%20F), [Mandeville, LA](https://openairdocs.org/faa-place/LA/Mandeville), built 1981, S/N 400-0345
- [N23618](https://openairdocs.org/aircraft/N23618): [Aerinova Aerial LLC](https://openairdocs.org/faa-owner/AERINOVA%20AERIAL%20LLC), [Mattoon, IL](https://openairdocs.org/faa-place/IL/Mattoon), built 1981, S/N 400-0402
- [N23649](https://openairdocs.org/aircraft/N23649): [Abernathy Spraying Service Inc](https://openairdocs.org/faa-owner/ABERNATHY%20SPRAYING%20SERVICE%20INC), [Tipton, OK](https://openairdocs.org/faa-place/OK/Tipton), built 1981, S/N 400-0408
- [N23744](https://openairdocs.org/aircraft/N23744): [Van Horne Robert E](https://openairdocs.org/faa-owner/VAN%20HORNE%20ROBERT%20E), [Centralia, IL](https://openairdocs.org/faa-place/IL/Centralia), built 1982, S/N 400A-0429
- [N2393N](https://openairdocs.org/aircraft/N2393N): [Mid Mo Ag Air LLC](https://openairdocs.org/faa-owner/MID%20MO%20AG%20AIR%20LLC), [Boonville, MO](https://openairdocs.org/faa-place/MO/Boonville), S/N 400-0441
- [N3160Q](https://openairdocs.org/aircraft/N3160Q): [Ag Cat Applicators LLC](https://openairdocs.org/faa-owner/AG%20CAT%20APPLICATORS%20LLC), [Avoca, TX](https://openairdocs.org/faa-place/TX/Avoca), built 1982, S/N 400-0477
- [N31626](https://openairdocs.org/aircraft/N31626): [James Richard W](https://openairdocs.org/faa-owner/JAMES%20RICHARD%20W), [Chowchilla, CA](https://openairdocs.org/faa-place/CA/Chowchilla), built 1983, S/N 400-0511
- [N3164B](https://openairdocs.org/aircraft/N3164B): [L & L Flying Inc](https://openairdocs.org/faa-owner/L%20%26%20L%20FLYING%20INC), [Glen Allan, MS](https://openairdocs.org/faa-place/MS/Glen%20Allan), built 1984, S/N 400-0513
- [N3166Y](https://openairdocs.org/aircraft/N3166Y): [Dixie Crop Care Inc](https://openairdocs.org/faa-owner/DIXIE%20CROP%20CARE%20INC), [Dixie, GA](https://openairdocs.org/faa-place/GA/Dixie), built 1984, S/N 400-0515
- [N3652Z](https://openairdocs.org/aircraft/N3652Z): [Cotton Ag Inc](https://openairdocs.org/faa-owner/COTTON%20AG%20INC), [Walters, OK](https://openairdocs.org/faa-place/OK/Walters), built 1980, S/N 400-0256
- [N3654G](https://openairdocs.org/aircraft/N3654G): [Dixie Flying Service Inc](https://openairdocs.org/faa-owner/DIXIE%20FLYING%20SERVICE%20INC), [Bradley, AR](https://openairdocs.org/faa-place/AR/Bradley), S/N 400-0281
- [N3655T](https://openairdocs.org/aircraft/N3655T): [Putz Gary D](https://openairdocs.org/faa-owner/PUTZ%20GARY%20D), [Hearne, TX](https://openairdocs.org/faa-place/TX/Hearne), S/N 301-0300
- [N3659N](https://openairdocs.org/aircraft/N3659N): [Hoppe Air LLC](https://openairdocs.org/faa-owner/HOPPE%20AIR%20LLC), [Beaman, IA](https://openairdocs.org/faa-place/IA/Beaman), S/N 400-0294
- [N400XX](https://openairdocs.org/aircraft/N400XX): [Abernathy Spraying Service Inc](https://openairdocs.org/faa-owner/ABERNATHY%20SPRAYING%20SERVICE%20INC), [Tipton, OK](https://openairdocs.org/faa-place/OK/Tipton), built 1986, S/N 4000646
- [N432WA](https://openairdocs.org/aircraft/N432WA): [Woodley Aerial Leasing LLC](https://openairdocs.org/faa-owner/WOODLEY%20AERIAL%20LEASING%20LLC), [Walnut, IL](https://openairdocs.org/faa-place/IL/Walnut), S/N 400-0435
- [N444AS](https://openairdocs.org/aircraft/N444AS): [Aas LLC](https://openairdocs.org/faa-owner/AAS%20LLC), [Ovid, MI](https://openairdocs.org/faa-place/MI/Ovid), built 1982, S/N 400-0438
- [N444MS](https://openairdocs.org/aircraft/N444MS): [Aas LLC](https://openairdocs.org/faa-owner/AAS%20LLC), [Ovid, MI](https://openairdocs.org/faa-place/MI/Ovid), S/N 400-0444
- [N501JK](https://openairdocs.org/aircraft/N501JK): [Barjoseph Shirley](https://openairdocs.org/faa-owner/BARJOSEPH%20SHIRLEY), [Chanute, KS](https://openairdocs.org/faa-place/KS/Chanute), S/N AT400-0482
- [N6072Y](https://openairdocs.org/aircraft/N6072Y): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1981, S/N 0397
- [N6082Y](https://openairdocs.org/aircraft/N6082Y): [Dash Flying Service LLC](https://openairdocs.org/faa-owner/DASH%20FLYING%20SERVICE%20LLC), [Chilton, WI](https://openairdocs.org/faa-place/WI/Chilton), built 1980, S/N 0273
- [N73005](https://openairdocs.org/aircraft/N73005): [Mid Atlantic Ag LLC](https://openairdocs.org/faa-owner/MID%20ATLANTIC%20AG%20LLC), [Nassau, DE](https://openairdocs.org/faa-place/DE/Nassau), built 1985, S/N 400-0520
- [N7300E](https://openairdocs.org/aircraft/N7300E): [Mark Gary Flying Service Inc](https://openairdocs.org/faa-owner/MARK%20GARY%20FLYING%20SERVICE%20INC), [Inverness, MS](https://openairdocs.org/faa-place/MS/Inverness), built 1984, S/N 400-0517
- [N7307T](https://openairdocs.org/aircraft/N7307T): [Aas LLC](https://openairdocs.org/faa-owner/AAS%20LLC), [Ovid, MI](https://openairdocs.org/faa-place/MI/Ovid), built 1985, S/N 400-0610
- [N73080](https://openairdocs.org/aircraft/N73080): [Tall Towers Aviation Inc](https://openairdocs.org/faa-owner/TALL%20TOWERS%20AVIATION%20INC), [Page, ND](https://openairdocs.org/faa-place/ND/Page), built 1985, S/N 400-0639
- [N73084](https://openairdocs.org/aircraft/N73084): [Precision Aerial Ag LLC](https://openairdocs.org/faa-owner/PRECISION%20AERIAL%20AG%20LLC), [Seneca, KS](https://openairdocs.org/faa-place/KS/Seneca), built 1985, S/N 400-0638
- [N7308A](https://openairdocs.org/aircraft/N7308A): [Devil Dusters Inc](https://openairdocs.org/faa-owner/DEVIL%20DUSTERS%20INC), [Artesia, NM](https://openairdocs.org/faa-place/NM/Artesia), built 1985, S/N 400-0624
- [N81400](https://openairdocs.org/aircraft/N81400): [E&D Farms LLC](https://openairdocs.org/faa-owner/E%26D%20FARMS%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1981, S/N 400-0353
- [N82400](https://openairdocs.org/aircraft/N82400): [Stubbs Mickey Lee](https://openairdocs.org/faa-owner/STUBBS%20MICKEY%20LEE), [Rochelle, GA](https://openairdocs.org/faa-place/GA/Rochelle), built 1981, S/N 400-0372

## NTSB investigations (34)

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 WPR18LA234](https://openairdocs.org/ntsb/WPR18LA234), Aug 21, 2018: Air Tractor AT 400 (N7300M), Grand Forks, ND, substantial damage. Probable cause: The loss of engine power while maneuvering due to the failure of the power turbine blade assembly for reasons that could not be determined based on available evidence.
- [NTSB GAA16CA462](https://openairdocs.org/ntsb/GAA16CA462), Sep 5, 2016: Air Tractor AT (N31627), Hondo, TX, substantial damage. Probable cause: The pilot’s failure to maintain clearance from an antenna atop a tower while maneuvering at a low altitude and the airplane’s subsequent impact with terrain during an attempted off-airport landing.
- [NTSB CEN15LA182](https://openairdocs.org/ntsb/CEN15LA182), Mar 26, 2015: Air Tractor AT 400 (N136DB), Levelland, TX, substantial damage. Probable cause: The in-flight separation of the left aileron's attachment hardware at the connection between the long aileron pushrod and the left aileron bellcrank. Contributing to the accident was maintenance…
- [NTSB CEN13LA486](https://openairdocs.org/ntsb/CEN13LA486), Aug 9, 2013: Air Tractor AT-400 (N36538), Dumas, AR, substantial damage. Probable cause: The pilot's failure to maintain directional control of the airplane during landing.
- [NTSB CEN13FA465](https://openairdocs.org/ntsb/CEN13FA465), Aug 5, 2013: Air Tractor AT-400 (N3159B), Balko, OK, destroyed, 1 fatal. Probable cause: The pilot's failure maintain clearance from a meteorological tower while en route at a low altitude. Contributing to the accident was the sun's glare.
- [NTSB CEN13LA425](https://openairdocs.org/ntsb/CEN13LA425), Jul 19, 2013: Air Tractor AT-400 (N155HF), Steward, IL, substantial damage. Probable cause: The pilot's failure to maintain clearance from the guy wires during an aerial application maneuver. Contributing to the accident was the pilot's failure to identify potential obstructions in the area…
- [NTSB CEN11LA593](https://openairdocs.org/ntsb/CEN11LA593), Aug 23, 2011: Air Tractor AT-400 (N23720), Monango, ND, substantial damage. Probable cause: The pilot did not maintain adequate separation from a tree during the aerial-application flight.
- [NTSB CEN11LA566](https://openairdocs.org/ntsb/CEN11LA566), Aug 11, 2011: Air Tractor AT-400 (N3659N), Nelson, NE, substantial damage. Probable cause: Failure of the fuel control unit's spool cap bearing for reasons that could not be determined during extensive postaccident examination, and the pilot’s decision to shut the engine down without…
- [NTSB DFW07LA152](https://openairdocs.org/ntsb/DFW07LA152), Jul 8, 2007: Air Tractor AT-400 (N3164N), Delhi, LA, substantial damage. Probable cause: the pilot's failure to maintain control of the airplane while practicing aerial application turns over a field.
- [NTSB CHI06CA221](https://openairdocs.org/ntsb/CHI06CA221), Jul 31, 2006: Air Tractor AT-400 (N23720), Springfield, MN, substantial damage. Probable cause: The pilot's inability to maintain directional control of the airplane as a result of the partial failure of the tail wheel assembly. A factor associated with the accident was the crop that the…
- [NTSB FTW04LA201](https://openairdocs.org/ntsb/FTW04LA201), Jul 31, 2004: Air Tractor AT-400 (N3159W), Clayton, LA, destroyed. Probable cause: The pilot's failure to maintain clearance from the high tension power lines.
- [NTSB FTW03LA004](https://openairdocs.org/ntsb/FTW03LA004), Oct 2, 2002: Air Tractor AT-400 (N155HF), Marmaduke, AR, substantial damage. Probable cause: The pilot's failure to maintain aircraft control. A contributing factor was the towering cumulus in all quadrants.
- [NTSB FTW01LA137](https://openairdocs.org/ntsb/FTW01LA137), Jun 8, 2001: Air Tractor AT-400 (N400ZR), Oil Trough, AR, substantial damage. Probable cause: the pilot's failure to refuel the airplane which resulted in the loss of engine power due to fuel exhaustion. A contributory factor was the lack of suitable terrain for the forced landing.
- [NTSB CHI99FA165](https://openairdocs.org/ntsb/CHI99FA165), May 25, 1999: Air Tractor AT-400 (N400MJ), Elkhart, KS, destroyed, 1 fatal. Probable cause: The pilot's inadequate in-flight planning/decision and his inadvertent flight into instrument meteorological conditions which resulted in spatial disorientation and subsequent loss of aircraft…
- [NTSB ATL99LA085](https://openairdocs.org/ntsb/ATL99LA085), May 13, 1999: Air Tractor AT-400 (N36493), Louisville, MS, substantial damage. Probable cause: INADEQUATE PREFLIGHT BY THE PILOT, WHICH RESULTED IN FUEL EXHAUSTION, DUE TO AN INADEQUATE SUPPLY OF FUEL.
- [NTSB DEN99TA013](https://openairdocs.org/ntsb/DEN99TA013), Oct 19, 1998: Air Tractor AT-400 (N73080), Aztec, NM, substantial damage. Probable cause: The pilot's inadequate preflight inspection of the airplane. Factors were the unsecured oil dipstick, the loss of engine oil pressure necessitating a precautionary landing on unsuitable terrain, and…
- [NTSB LAX98LA233](https://openairdocs.org/ntsb/LAX98LA233), Jul 17, 1998: Air Tractor AT-400 (N2373V), Tranquillity, CA, substantial damage. Probable cause: The pilot's failure to detect and avoid a set of wires during a night aerial application flight. Factors in the accident were the pilot's failure to perform an adequate preflight inspection of the…
- [NTSB FTW97LA321](https://openairdocs.org/ntsb/FTW97LA321), Aug 25, 1997: Air Tractor AT-400 (N3654G), Sudan, TX, substantial damage. Probable cause: The loss of engine power due to the failure of a compressor turbine blade. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW97LA245](https://openairdocs.org/ntsb/FTW97LA245), Jun 11, 1997: Air Tractor AT-400A (N36538), Church Point, LA, substantial damage. Probable cause: The pilot's improperly performed short field takeoff procedures.
- [NTSB MIA97LA012](https://openairdocs.org/ntsb/MIA97LA012), Oct 21, 1996: Air Tractor 400 (N73080), Sylvester, GA, substantial damage. Probable cause: Was the pilots intentional disregard for operating the engine contrary to the flight manuals for intentionally exceeding the maximum engine temperature, resulting in creep failure of one of the…
- [NTSB FTW96FA288](https://openairdocs.org/ntsb/FTW96FA288), Jul 2, 1996: Air Tractor AT-400 (N501JS), Huffman, TX, substantial damage, 1 fatal. Probable cause: corroded flight control components, due to the operator's inadequate maintenance and inspection of the airplane; the pilot's failure to follow procedures and directives, by flying the airplane…
- [NTSB CHI95LA278](https://openairdocs.org/ntsb/CHI95LA278), Aug 15, 1995: Air Tractor AT-400 (N2315Z), Hayti, MO, destroyed, 1 fatal. Probable cause: the pilot inadvertently stalled the airplane. A factor was the reduced power setting.
- [NTSB FTW95LA247](https://openairdocs.org/ntsb/FTW95LA247), Jun 16, 1995: Air Tractor AT-301 (N315PF), Guymon, OK, destroyed. Probable cause: THE PILOT'S FAILURE TO MAINTAIN AIRSPEED. THE HIGH DENSITY ALTITUDE WAS A FACTOR.
- [NTSB FTW94LA086](https://openairdocs.org/ntsb/FTW94LA086), Feb 27, 1994: Air Tractor AT400 (N3652D), Widener, AR, destroyed, 1 fatal. Probable cause: THE PILOT'S LOSS OF CONTROL FOR UNDETERMINED REASONS.
- [NTSB ATL93LA056](https://openairdocs.org/ntsb/ATL93LA056), Feb 5, 1993: Air Tractor AT-400 (N36521), South Mills, NC, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM TREES DURING AN AERIAL APPLICATION MANEUVER. FACTORS WERE THE TREES ADJACENT TO THE WHEAT FIELD, AND THE SOFT TERRAIN.
- [NTSB LAX92LA227](https://openairdocs.org/ntsb/LAX92LA227), Jun 2, 1992: Air Tractor AT 400 (N7307V), Lemoore, CA, destroyed. Probable cause: THE PILOT'S FAILURE TO OBSERVE THE PRESENCE OF AN OBSTACLE IN THE FIELD. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE THE DARK NIGHTTIME LIGHT CONDITION, AND THE SMALL SIZE AND COLOR OF THE…
- [NTSB NYC90DGM01](https://openairdocs.org/ntsb/NYC90DGM01), May 8, 1990: Air Tractor AT-400 (N2369N), Tyrone, PA, destroyed. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ADEQUATE CLEARANCE FROM OBSTRUCTIONS DURING LOW LEVEL AERIAL APPLICATION OPERATIONS. THE PILOT'S INADEQUATE VISUAL LOOKOUT WAS A FACTOR.
- [NTSB MKC89LA123](https://openairdocs.org/ntsb/MKC89LA123), Jun 2, 1989: Air Tractor AT-400 (N3159W), Poplar Bluff, MO, substantial damage. Probable cause: THE PILOT IN COMMAND MISJUDGED THE CLEARANCE OF THE AIRCRAFT'S VERTICAL STABILIZER FROM THE POWER LINES.
- [NTSB FTW85LA330](https://openairdocs.org/ntsb/FTW85LA330), Aug 23, 1985: Air Tractor AT-400 (N3656N), Oak Ridge, LA, substantial damage
- [NTSB MKC84LA178](https://openairdocs.org/ntsb/MKC84LA178), Jun 18, 1984: Snow AT400 (N501JS), Portland, AR, substantial damage
- [NTSB FTW82DA372](https://openairdocs.org/ntsb/FTW82DA372), Sep 9, 1982: Air Tractor AT-400 (N2369N), Muleshoe, TX, substantial damage
- [NTSB FTW82FRJ16](https://openairdocs.org/ntsb/FTW82FRJ16), Aug 23, 1982: Air Tractor AT-400 (N2342Z), Jones, LA, substantial damage, 2 fatal
- [NTSB FTW82DA118](https://openairdocs.org/ntsb/FTW82DA118), Apr 8, 1982: Air Tractor AT-400 (N36493), Edna, TX, substantial damage
- [NTSB FTW81FQG25](https://openairdocs.org/ntsb/FTW81FQG25), May 1, 1981: Air Tractor AT400 (N36538), Patricia, TX, substantial damage

## FAA accident and incident reports (49)

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.

- [Incident 20260313004419I](https://openairdocs.org/incident/20260313004419I), Mar 13, 2026: Air Tractor AT 400 (N2393N), Sedalia, MO, No damage. The pilot initiated the takeoff roll on runway 18 with a full load of fertilizer. When the tailwheel started to rise during the attempted takeoff, a crosswind…
- [Accident 20180821024479A](https://openairdocs.org/incident/20180821024479A), Aug 21, 2018: Air Tractor Inc AT-400 (N7300M), Grand Forks, ND, Substantial damage. The aircraft crashed into a field across the road from the field that the aircraft was spraying. The pilot was badly injured, including leg and head injuries.…
- [Accident 20160905014959A](https://openairdocs.org/incident/20160905014959A), Sep 5, 2016: Air Tractor Inc AT-400 (N31627), Hondo, TX, Destroyed. On September 5, 2016, at approximately 11:20 hours, an Air tractor AT-400, N31627 ^owned by rustys flying service^ and operated by lindeman inc, crashed in a…
- [Accident 20150326003819A](https://openairdocs.org/incident/20150326003819A), Mar 26, 2015: Air Tractor Inc AT-400 (N136DB), Levelland, TX, Destroyed. AT-402, N136DB was being rebuilt; the right wing was sent to the factory for rebuilding and a replacement engine was installed. This was the first flight after…
- [Accident 20130809015629A](https://openairdocs.org/incident/20130809015629A), Aug 9, 2013: Air Tractor Inc AT-400 (N36538), Dumas, AR, Substantial damage. On 08/09/2013, N36538 landed at Billy Free Municipal Airport (omo) and departed the runway. Aircraft was being operated by a commercially rated pilot with a…
- [Accident 20130805013629A](https://openairdocs.org/incident/20130805013629A), Aug 5, 2013: Air Tractor Inc AT-400 (N3159B), Balko, OK, Destroyed, 1 fatal. On August 5, 2013 at 10:12 local CDT, an Air tractor AT-400 aircraft bearing registration number N3159B, registered to turhune flying service, inc., was…
- [Accident 20130719012309A](https://openairdocs.org/incident/20130719012309A), Jul 19, 2013: Air Tractor Inc AT-400 (N155HF), Steward, IL, Destroyed. Aircraft crashed in corn field at approximately 08:07 CDT on July 19, 2013. According to state police first responder, jordan jackson, office: [privacy data…
- [Incident 20130715013079I](https://openairdocs.org/incident/20130715013079I), Jul 15, 2013: Air Tractor Inc AT-400 (N136DB), Whiting, IA, Minor damage. Pilot was on a test flight to test a suspected problem with the fuel control unit. The pilot was slightly low on final approach to landing and added throttle…
- [Incident 20130215002019I](https://openairdocs.org/incident/20130215002019I), Feb 15, 2013: Air Tractor Inc AT-400 (N400ZR), Oil Trough, AR, Minor damage. On February 15, 2013 at aprroximately 11:00 CST an AT-400-400 N400ZR flown by a commercial rated pilot and operated by barber flying service certificate…
- [Accident 20110823018369A](https://openairdocs.org/incident/20110823018369A), Aug 23, 2011: Air Tractor Inc AT-400 (N23720), Monago, ND, Destroyed. Pilot was spraying field NE of Monago ndin a "race track" type spray pattern. Sprayed 3 fields going east and west north of 85th st, then was spraying last…
- [Accident 20110810020579A](https://openairdocs.org/incident/20110810020579A), Aug 10, 2011: Air Tractor Inc AT-400 (N3659N), Nelson, NE, Substantial damage. Pilot noticed engine torque fluctuation of 10-15 lbs, yet continued to operate at 75% power. Pilot pulled fuel cutoff to shut down engine. Pilot landed 253…
- [Incident 20110717015139I](https://openairdocs.org/incident/20110717015139I), Jul 17, 2011: Air Tractor Inc AT-400 (N432WA), Congerville, IL, Minor damage. Airman stated that during a swath run he momentarily became distracted. When he returned his attention to the flight path he realized he was rapidly…
- [Incident 20100709037629I](https://openairdocs.org/incident/20100709037629I), Jul 9, 2010: Air Tractor AT-400 (N7300E), Hollandale, MS, Minor damage. While spraying a rice field the aircraft struck a powerline. Landed in the rice field. No injuries. No damage to aircraft except propeller.
- [Incident 20100702037409I](https://openairdocs.org/incident/20100702037409I), Jul 2, 2010: Air Tractor AT-400 (N3654G), Linden, IN, No damage. The AT-400 aircraft suffered a power loss due to first stage compressor blade failure, for reasons unknown, while spraying a corn field just north of Linden…
- [Accident 20070708014809A](https://openairdocs.org/incident/20070708014809A), Jul 8, 2007: Airtrc AT400 (N3164N), Delhi, LA, Destroyed. (-23) Witnesses have stated that aircraft flew low over residential area (above powerlines) and made several passes over and alongside of houses/trailers. One…
- [Accident 20060731017019A](https://openairdocs.org/incident/20060731017019A), Jul 31, 2006: Airtrc AT400 (N23720), Springfield, MN, Substantial damage. (-23) Aircraft was landing on a Private airstip 7 miles n of Springfield, MN. As the aircraft touched down the pilot believes the tail wheel assembly failed…
- [Accident 20040731017799A](https://openairdocs.org/incident/20040731017799A), Jul 31, 2004: Airtrc AT400 (N3159W), Clayton, LA, Destroyed. (-23) On July 31, 2004, at 0850 CDT, an air tractor AT-400 agricultural airplane, N3159W, owned and operated by goodman's flying service of chase, LA, was…
- [Incident 20030327005149I](https://openairdocs.org/incident/20030327005149I), Mar 27, 2003: Airtrc AT400 (N23744), Beedeville, AR, Minor damage. (-23) L/h gear leg had developed a surface crack defect. Upon touch down for landing the gear made a loud pop noise as the defect promagated itself and caused…
- [Accident 20021002031339A](https://openairdocs.org/incident/20021002031339A), Oct 2, 2002: Airtrc AT400 (N155HF), Marmaduke, AR, Substantial damage. (-23) On October 2, 2002, at 1937Z, an air tractor AT-400, N155HF, while conducting aerial application of malathion on two cotton fields pulled up and over a…
- [Accident 20010608014559A](https://openairdocs.org/incident/20010608014559A), Jun 8, 2001: Airtrc AT400 (N400ZR), Oiltrough, AR, No damage. (-23) On June 8, 2001 at approximately 1400 hours, N400ZR, an air tractor, AT-400 engine failed and crash-landed while returning to the refuel and re-load ag…
- [Incident 20010426015709I](https://openairdocs.org/incident/20010426015709I), Apr 26, 2001: Airtrc AT400 (N3656T), Eunice, LA, Substantial damage. (-23) Aircraft lost power pulling out of field on last pass. Pilot landed short of airstrip. Aircraft hit the levee and nosed over striking propeller.…
- [Accident 19990525005599A](https://openairdocs.org/incident/19990525005599A), May 25, 1999: Airtrc AT400 (N400MJ), Elkhart, KS, Destroyed, 1 fatal. Acft was on a relocation flight when it crashed under unknown circumstances, the pilot/sole occupant suffered fatal injuries, the acft was destroyed. (.4) the…
- [Accident 19990513020839A](https://openairdocs.org/incident/19990513020839A), May 13, 1999: Airtrc AT400 (N36493), Louisville, MS, Substantial damage. On may 13, 1999, at 1100 central daylight time, a air tractor AT-400, N36493, collided with trees shortly after takeoff, in Louisville, Mississippi. The…
- [Accident 19981019029799A](https://openairdocs.org/incident/19981019029799A), Oct 19, 1998: Airtrc AT400 (N73080), Azetc, NM, Substantial damage. Acft was involved in aerial application when the engine ran out of oil due to the pilot not securing the dipstick.(.19) on October 19, 1998, approximately 1300…
- [Accident 19980716021219A](https://openairdocs.org/incident/19980716021219A), Jul 16, 1998: Airtrc AT400 (N2373V), Tranquillity, CA, Substantial damage. Severed top of vertical stabilizer on a unseen telephone line during night spray run. Ground looped landing. (-23) pilot performing aerial application at night…
- [Incident 19971119034889I](https://openairdocs.org/incident/19971119034889I), Nov 19, 1997: Airtrc AT400 (N3656T), Jonesboro, AR, Minor damage. Narrative: on landing aircraft the right brake was applied but did not engage. Left brake was engaged. Aircraft crossed strip and stopped in a fish pond. Prop…
- [Accident 19970825024229A](https://openairdocs.org/incident/19970825024229A), Aug 25, 1997: Airtrc AT400 (N3654G), Sudan, TX, Substantial damage. Aircraft engine failed during aerial application, made emergency landing. (-23) engine failure during approach into field for spray pass.
- [Incident 19970613013769I](https://openairdocs.org/incident/19970613013769I), Jun 13, 1997: Airtrc AT400 (N36538), Branch, LA, Minor damage. (-23) Pilot was attempting takeoff, W/2230# aircraft got off the ground but was unable to maintain successful flight, settled back down on the side of hwy 35…
- [Accident 19961021047419A](https://openairdocs.org/incident/19961021047419A), Oct 21, 1996: Airtrc AT400 (N73080), Sylvester, GA, Substantial damage. (-16) AT-400 ag aircraft conducting cotton defoliant spraying suffered loss on engine power. During the forced landing the aircraft was excessively braked…
- [Accident 19960702015769A](https://openairdocs.org/incident/19960702015769A), Jul 2, 1996: Airtrc AT400 (N501JS), Houston, TX, Substantial damage, 1 fatal. Stalled entering base to land at ag strip. Found elevator controls failed from corrosion. Strut attach brackets gone (-23) on July 2, 1996, at approximately…
- [Accident 19950815024089A](https://openairdocs.org/incident/19950815024089A), Aug 15, 1995: Airtrc AT400 (N2315Z), Black Island, MO, Destroyed, 1 fatal. Aircraft crashed while crop dustng. (-4)examination of the wreckage revealed no evidence of preimpact mechanical malfunction. The wings were crushed…
- [Accident 19950616017959A](https://openairdocs.org/incident/19950616017959A), Jun 16, 1995: Airtrc AT301 (N315PF), Guymon, OK, Substantial damage. Overloaded settled. Flew under wires but landing gear caught on fence. Max load and high density altitude factors.
- [Incident 19940505010219I](https://openairdocs.org/incident/19940505010219I), May 5, 1994: Airtrc AT400 (N31627), Opelousas, LA, Minor damage. Had to fly under one set wires and over next set during spray run. Pulled up too quickly struck first set.
- [Accident 19940227002929A](https://openairdocs.org/incident/19940227002929A), Feb 27, 1994: Airtrc AT400 (N3652D), Widener, AR, Destroyed, 1 fatal. Lost control on a turn around. Found inverted and burning. Indicates a possible accelerated stall. No anomalies.
- [Accident 19930205003339A](https://openairdocs.org/incident/19930205003339A), Feb 5, 1993: Airtrc AT400 (N36521), South Mills, NC, Substantial damage. Struck trees on pull-up from spray run. Forced down in muddy field. Nosed over.
- [Accident 19920602017959A](https://openairdocs.org/incident/19920602017959A), Jun 2, 1992: Airtrc AT400 (N7307V), Lemoore, CA, Substantial damage. Left wing struck a rusty vent pipe during a night spray run. Other vent pipes were painted white.
- [Incident 19900715036689I](https://openairdocs.org/incident/19900715036689I), Jul 15, 1990: Airtrc AT400 (N3159W), Blaine, MS, Minor damage. Lost directional control on rollout. Found right brake was inoperative.
- [Accident 19900508014699A](https://openairdocs.org/incident/19900508014699A), May 8, 1990: Airtrc AT400 (N2369N), Tyrone, PA, Destroyed. Struck power line on 3rd pass over spray field. Crashed in trees and burned. Had surveyed area but failed see wires
- [Incident 19891020056429I](https://openairdocs.org/incident/19891020056429I), Oct 20, 1989: Airtrc AT400 (N7300T), Beaumont, TX. Lost power en route. Forced landing in field without incident. Fuel pump not delivering steady flow.
- [Accident 19890602049069A](https://openairdocs.org/incident/19890602049069A), Jun 2, 1989: Airtrc AT400 (N3159W), Poplar Bluff, MO, Substantial damage. Tail assembly struck wires while pilot was flying under them. Uncontrollable aircraft collided with the ground.
- [Incident 19890428018959I](https://openairdocs.org/incident/19890428018959I), Apr 28, 1989: Airtrc AT400 (N3159W), Poplar Bluff, MO, Minor damage. Truck drove on runway while aircraft on takeoff. Pilot pulled up abruptly missed truck but flew through wires.
- [Incident 19870728068649I](https://openairdocs.org/incident/19870728068649I), Jul 28, 1987: Airtrc AT400 (N3656T), Provident City, TX, Minor damage. On initial takeoff roll the right main gear broke. Propeller, engine and wing struck the ground.
- [Accident 19850823047179A](https://openairdocs.org/incident/19850823047179A), Aug 23, 1985: Airtrc AT400 (N3656N), Oak Ridge, LA, Destroyed. Collided with ground after stall during a sharp turn while spraying. Did not add power or dump spray load.
- [Incident 19840710036069I](https://openairdocs.org/incident/19840710036069I), Jul 10, 1984: Airtrc AT400 (N3159B), Burlington, CO, Minor damage. Pilot reported the aircraft nosed up during an emergency landing after running out of fuel.
- [Accident 19840618027311A](https://openairdocs.org/incident/19840618027311A), Jun 18, 1984: Airtrc AT400 (N501JS), Portland, AR, Substantial damage. Chopped the tail off another ag aircraft N501PR while flaring for landing. N501PR had landed from a higher pattern.
- [Accident 19820909044889A](https://openairdocs.org/incident/19820909044889A), Sep 9, 1982: Airtrc AT400 (N2369N), Muleshoe, TX, Substantial damage. Aircraft collided with a water spray machine while on a spray run.
- [Accident 19820823063732A](https://openairdocs.org/incident/19820823063732A), Aug 23, 1982: Airtrc AT400 (N2342Z), Jones, LA, Substantial damage. Aircraft had mid-air collision during spraying operation. N8474V.
- [Accident 19820407042549A](https://openairdocs.org/incident/19820407042549A), Apr 7, 1982: Airtrc AT400 (N36493), Edna, TX, Substantial damage. Struck a dump truck parked on the runway while landing after dark without lights on aircraft or runway.
- [Accident 19810501021039A](https://openairdocs.org/incident/19810501021039A), May 1, 1981: Airtrc AT400 (N36538), Patricia, TX, Substantial damage. Pilot claimed engine quit on takeoff from ag strip. No engine or fuel problems found after accident. Ignition off.

## Service difficulty reports (7)

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

- [SDR CA110929003](https://openairdocs.org/sdr/CA110929003), Aug 10, 2011: ENGINE. POWER LOSS. (CAN) UPON REDUCING POWER FOR LANDING, THE ENGINE WOULD NOT DECREASE BELOW 75 PERCENT. THE PILOT ELECTED TO SHUTDOWN THE ENGINE DURING FINAL, HOWEVER HE MISJUDG
- [SDR A2D2003F00000](https://openairdocs.org/sdr/A2D2003F00000), Apr 2, 2003: LEG ASSY. BROKEN. LT LANDING GEAR LEG DEVELOPED SURFACE DEFECT (CRACK) A SHEER WAS PROLONGED FROM THE DEFECT THROUGH THE 1 INCH GEAR LEG THICKNESS. THE AIRCRAFT LANDED WHEN A LOU
- [SDR EY2R9601227](https://openairdocs.org/sdr/EY2R9601227), Nov 1, 1996: BLADE. CORRODED. BLADE, SN H44122, FOUND CORRODED.
- [SDR EY2R9600665](https://openairdocs.org/sdr/EY2R9600665), May 1, 1996: PTCH CHANGE ROD. CORRODED. PITCH CHANGE ROD FOUND CORRODED.
- [SDR EY2R9600664](https://openairdocs.org/sdr/EY2R9600664), May 1, 1996: PISTON UNIT. CORRODED. PISTON UNIT FOUND CORRODED.
- [SDR EY2R9600663](https://openairdocs.org/sdr/EY2R9600663), May 1, 1996: PILOT TUBE. CORRODED. PILOT TUBE FOUND CORRODED.
- [SDR EY2R9600659](https://openairdocs.org/sdr/EY2R9600659), May 1, 1996: BEARING. CORRODED. BEARING CORRODED.

## STCs that may be installed (OpenAirDocs) (61, 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 SA04484CH](https://openairdocs.org/stc/SA04484CH): Installation of a Reabe Aircraft Improvement Power Gate Control System. Reabe Design LLC
- [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 SA12204WI](https://openairdocs.org/stc/SA12204WI): Wing Spar Cap manufacturing process change. Air Tractor Inc
- [STC SA03040CH](https://openairdocs.org/stc/SA03040CH): Installation of a digital payload hopper quantity and spray boom pressure indicating system. Reabe Design LLC
- [STC SA7965SW](https://openairdocs.org/stc/SA7965SW): Application of fabric and polyurethane finishing system. Shady Aviation LLC
- [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 SA4503NM](https://openairdocs.org/stc/SA4503NM): Remove original cloth covering and install Ceconite covering. Ceconite Division of Poly-Fiber Inc
- [STC SA02266SE](https://openairdocs.org/stc/SA02266SE): Installation of a Lever Throttle Quadrant. Kawak Aviation Technologies Inc
- [STC SA04776NY](https://openairdocs.org/stc/SA04776NY): The HIPEC Covering and Finishing System must be performed and maintained. HIPEC Aircraft Coatings Inc
- [STC SA03819NY](https://openairdocs.org/stc/SA03819NY): Installation and maintenance of Oratex 6000 Covering and Coating System. Lanitz-Prena Folien Factory GmbH
- [STC SA00401BO](https://openairdocs.org/stc/SA00401BO): Installation of a SkyTrax100B UAT receiver. Avidyne Corporation
- [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 SA02135SE](https://openairdocs.org/stc/SA02135SE): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data). Electronics International Inc
- [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation
- [STC SA01323CH](https://openairdocs.org/stc/SA01323CH): Installation of a ground single point fueling system. Turbine Conversions Ltd
- [STC SA00905SE](https://openairdocs.org/stc/SA00905SE): Install modified engine cowl. Cascade Flying Service LLC
- [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 SA01745WI](https://openairdocs.org/stc/SA01745WI): Installation of a Cable Cutter System on the Main Landing Gear. Hershey Flying Service Inc
- [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 SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA00489LA](https://openairdocs.org/stc/SA00489LA): Installation of winglets. Aero Spraying Service Inc
- [STC ST03554CH](https://openairdocs.org/stc/ST03554CH): Installation of Rotary Gatekeeper and provisions equipment. Turbine Conversions Ltd
- [STC SA00403SE](https://openairdocs.org/stc/SA00403SE): Installation of Vortex Generators on the wings. Micro AeroDynamics Inc
- [STC SA03199CH](https://openairdocs.org/stc/SA03199CH): Install auto fill fuel system. Wilbur-Ellis LLC
- [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 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 SP00400SE](https://openairdocs.org/stc/SP00400SE): Installation of various propeller electrical de-icer models. SMR Technologies
- [STC SA02279CH](https://openairdocs.org/stc/SA02279CH): Installation of wing mounted aerial dispenser system. A & M Engineering
- [STC SA00171BO](https://openairdocs.org/stc/SA00171BO): Installation of Pratt & Whitney Engine Services, Inc. Aircraft Data Acquisition System ADAS+, P/N ADAS-K-010. Pratt & Whitney Engine Services Inc
- [STC SA2505NM](https://openairdocs.org/stc/SA2505NM): Installation of Pheromone aerial application system. (AT-400A RESTRICTED CATEGORY). Herculite Products Inc
- [STC SA04677CH](https://openairdocs.org/stc/SA04677CH): Installation of a Powered Hopper Lid and Auger System. Reabe Design LLC
- [STC SA01639NY](https://openairdocs.org/stc/SA01639NY): Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B. Scale Modelbuilders Inc
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics 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 SA572EA](https://openairdocs.org/stc/SA572EA): Installation of Goodrich Model 5735K deicer kit (P/N 5735 deicer boot, P/N D-5735-1 cable, P/N 5735H hardware kit). Limited to aircraft which incorporate Goodrich Propeller Deicing Systems equipped with Goodrich Propeller Deicer Boot P/N 4E1185-5 on Hartzell propellers as listed on STC SA572EA eligibility list. Goodrich Corp
- [STC SA1110GL](https://openairdocs.org/stc/SA1110GL): Surrendered and incorporated into STC SA00478CH. AAR
- [STC SA01528CH](https://openairdocs.org/stc/SA01528CH): Installation of Walter M601E-11 model turbine engine and an AVIA Propeller Limited VJ8.510 or VJ8.510AG propeller system or Hartzell HC-B3TW-3/T10282NS+4 model propeller. Turbine Conversions Ltd
- [STC SA265NW](https://openairdocs.org/stc/SA265NW): Installation of Automatic Flagman Model No. 4 (Dispenser System) on the upper surface of the right wing root. R-S Sales Inc
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SA812NE](https://openairdocs.org/stc/SA812NE): Installation of BF Goodrich Model 6975-1 De-Icer kit or BF Goodrich Model 6975-10 De-Icer kit. BF Goodrich Aerospace
- [STC SA00568WI](https://openairdocs.org/stc/SA00568WI): Installation of a Compro Aviation Driftfinder DFS-10 system which injects oil into engine exhaust to produce smoke that determines wind speed and direction. Compro Aviation Inc
- [STC SA00151SE](https://openairdocs.org/stc/SA00151SE): Fabrication and Installation of vortex generators and "delta wings" on the wings and a strake mounted above the left- and right-hand wing/fuselage junctions. Aeronautical Testing Service Inc
- [STC SA00648AT](https://openairdocs.org/stc/SA00648AT): Installation of chemical rinsing system. Paul S Woods

All 61: https://openairdocs.org/model/air-tractor-at-400/stcs.md

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