# N23744: 1982 Air Tractor AT-400 - Status: Valid registration - Airframe: [Air Tractor AT-400](https://openairdocs.org/model/air-tractor-at-400) (registry code 0390202, 1 seats) - Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) - Data sheets: [TCDS A9SW](https://openairdocs.org/tcds/A9SW) (Air Tractor Inc.) (OpenAirDocs) - Serial number: 400A-0429 - Year built: 1982 - Type: Fixed wing single engine - Engine type: Turbo-prop - Airworthiness: Restricted, agriculture and pest control - Airworthiness date: January 29, 1982 - Certificate issued: November 20, 2019 - Expires: November 30, 2029 - Mode S code: A22582 - Registered owner: [Van Horne Robert E](https://openairdocs.org/faa-owner/VAN%20HORNE%20ROBERT%20E) - Location: [Centralia, IL](https://openairdocs.org/faa-place/IL/Centralia) - Owner type: Individual - Owner's area on the map: 38.5110° N, 89.1405° W: Placed by OpenAirDocs at the center of ZIP code 62801, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=23744 - Page: https://openairdocs.org/aircraft/N23744 From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. ## ADs that may apply (OpenAirDocs): 13 in force ### Matched by airframe (Air Tractor AT-400) - [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 ### Matched by engine (Amateur-built UNKNOWN ENG) None in force. ### 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 in force) - [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 ## NTSB investigations None matched to N23744. ## FAA accident and incident reports (1) 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 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… ## Service difficulty reports (1) As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [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 ## STCs that may be installed (OpenAirDocs) (61, first 50) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Air Tractor AT-400) - [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/aircraft/N23744/stcs.md ## Related - Other Air Tractor AT-400 aircraft: https://openairdocs.org/model/air-tractor-at-400/aircraft.md - The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.