# Air Tractor AT-401A - Type: Aircraft model (FAA registry) - Registry code: 0390201 - Manufacturer (registry): AIR TRACTOR INC - Model: AT-401A - 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: 1 - Page: https://openairdocs.org/model/air-tractor-at-401a 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 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 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 Effective Jan 19, 1999 Historical (superseded or no longer in force): - [AD 2008-11-17](https://openairdocs.org/ad/2008-11-17) (historical): Overturn skid plate in the cockpit area · Air Tractor AT-250, AT-300, AT-301 and 14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 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 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) (3) - [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 ## Registered aircraft (1) - [N1014L](https://openairdocs.org/aircraft/N1014L): [Walnut, IL](https://openairdocs.org/faa-place/IL/Walnut), built 1989, S/N 401A-0733, Sale reported, pending cancellation ## NTSB investigations None matched to aircraft with this model. ## 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 20110716014569I](https://openairdocs.org/incident/20110716014569I), Jul 16, 2011: Air Tractor Inc AT-401A (N1014L), Warrensburg, IL, Minor damage. Airman was conducting swath runs on a north/south orientation in a cornfield with high tension power lines running diagonally through the field from a… ## STCs that may be installed (OpenAirDocs) (41) 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 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 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 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 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 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 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 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 SA7415SW](https://openairdocs.org/stc/SA7415SW): Installation of a cockpit bleed air heater. Turbine Conversions Ltd - [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 SA00622LA](https://openairdocs.org/stc/SA00622LA): Installation of an electronic digital engine tachometer horizon model P-1000. Horizon Instruments Inc - [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 SA00569WI](https://openairdocs.org/stc/SA00569WI): 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 SA00198SE](https://openairdocs.org/stc/SA00198SE): Fabrication and installation of vortex generators and 'delta wings' mounted on the wings and strakes 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 ## PMA parts (OpenAirDocs) (287, first 50) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first. - [066-108](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177752270920260728151445.0001): Brake Lining. Game Aerospace, LLC · PMA PQ00052CB · Replaces Cleveland Wheels and Brakes P/N… · Jun 9, 2026 - [066-001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147763038220260723131530.0001): Rivet. Game Aerospace, LLC · PMA PQ00052CB · Replaces Cleveland Wheels and Brakes P/N… · Jun 9, 2026 - [MDL TD 031851](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID198409638720250508133537.0001): VA-1A( )AndAccessories. Electronics International Inc · PMA PQ0088NM · Modification part · Apr 10, 2025 - [6-8-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192526834520241001140241.0001): Remote Cable. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-8-000 · Sep 19, 2024 - [6-4-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182724509120241001140239.0001): Pressure Probe. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-4-0-000 · Sep 19, 2024 - [6-3-0-570](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179524720720241001140234.0001): Quantity Probe Assembly. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-3-0-570 · Sep 19, 2024 - [6-0-0-570](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID166342441820241001140230.0001): True Quantity Gauge Installation 400 401 402 502 504. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-0-0-570 · Sep 19, 2024 - [6-3-2-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163430297920241001140238.0001): Probe Float. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-3-2-000 · Sep 19, 2024 - [6-9-1-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161759498020241001140242.0001): Loader Power Unit. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-9-1-000 · Sep 19, 2024 - [6-6-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156969834120241001140240.0001): Pressure Cable. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-6-0-000 · Sep 19, 2024 - [6-2-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156564156820241001140233.0001): Remote Display Unit. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-2-0-000 · Sep 19, 2024 - [6-1-4-00M](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153951964620241001140233.0001): Front Cover, Metric. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-1-4-00M · Sep 19, 2024 - [6-3-3-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150576026820241001140238.0001): Quantity Probe Clamp. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-3-3-000 · Sep 19, 2024 - [6-9-2-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147959019020241001140242.0001): Loader Quantity Power Switch. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-9-2-000 · Sep 19, 2024 - [6-1-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID143338782820241001140232.0001): Main Display Unit. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-1-0-000 · Sep 19, 2024 - [6-9-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142504418020241001140241.0001): Loader Power Kit. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-9-0-000 · Sep 19, 2024 - [6-3-1-570](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140795146520241001140237.0001): Quantity Probe. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-3-1-570 · Sep 19, 2024 - [6-9-3-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID140240077120241001140243.0001): Loader Power Cable. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-9-3-000 · Sep 19, 2024 - [6-5-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121784776620241001140239.0001): Quantity Probe Cable. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-5-0-000 · Sep 19, 2024 - [6-7-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117474099420241001140240.0001): Power Cable. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-7-0-000 · Sep 19, 2024 - [6-1-4-00E](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID102391190520241001140232.0001): Front Cover, English. Reabe Aircraft Products LLC · PMA PQ00029CB · Replaces 6-1-4-00E · Sep 19, 2024 - [01-0790906-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID171635809620220706160038.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · Jun 21, 2022 - [6-1-4-00E](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID995007669620220226051208.0001): Front Cover, English. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-3-2-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID932664671420220226051215.0001): Probe Float. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-3-0-TAB](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID850226922820220226051214.0001): Quantity Probe Assembly. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-6-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID810341013820220226051218.0001): Pressure Cable. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-7-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID782010676320220226051219.0001): Power Cable. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6001-0003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID781882135520220226051221.0001): Loader Power Unit. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6001-0004](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID772159877920220226051223.0001): Button Wire Assembly. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-9-3-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID753284939720220226051223.0001): Loader Power Cable. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-3-3-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID645037450202202260512160.0001): Quantity Probe Clamp. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-4-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID627890738020220226051217.0001): Pressure Probe. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6001-0002](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID512697648120220226051213.0001): Remote Display Box. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-2-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID474662213620220226051212.0001): Remote Display Unit. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-9-1-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID440859201220220226051220.0001): Loader Power Unit. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-1-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID342199224520220226051155.0001): Main Display Unit. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-3-1-TAB](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID341879306920220226051214.0001): Quantity Probe. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-5-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID305524283520220226051217.0001): Quantity Probe Cable. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-1-4-00M](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID301703858420220226051210.0001): Front Cover, Metric. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6001-0001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID261878209020220226051211.0001): Main Display Box. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-8-0-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180186047620220226051219.0001): Remote Cable. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [6-9-2-000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153127490520220226051222.0001): Loader Quantity Power Switch. Reabe Aircraft Improvement · PMA PQ4152CE · Modification part · Feb 23, 2022 - [206700-01](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID119333854820210712183606.0001): Air Tractor Windshield. Sierracin/Sylmar Corp · PMA PQ0115NM · Replaces 11466-2 · May 19, 2021 - [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID520858154820210622142443.0001): AeroLEDs LLC · PMA PQ5259NM · Mar 11, 2021 - [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID411903442820210702175209.0001): Aspen Avionics · PMA PQ03868SW · Jan 20, 2021 - [11-7512-12](https://drs.faa.gov/browse/excelExternalWindow/B60C541CC9002F43862585C2004920E3.0001): LIGHT-ASSY, Polaris 12V. AeroLEDs LLC · PMA PQ5259NM · Replaces A7512-12, W1290-14, T7512-12… · Jul 30, 2020 - [11-7512-24](https://drs.faa.gov/browse/excelExternalWindow/31CDBF01A9D20A2E862585C20049212E.0001): LIGHT-ASSY, Polaris 24V. AeroLEDs LLC · PMA PQ5259NM · Replaces W1290-28, T7512-24, CMA7512-24… · Jul 30, 2020 - [11-7512-24](https://drs.faa.gov/browse/excelExternalWindow/D78BB98D46054AD386258570005027C1.0001): Polaris 24VDC. AeroLEDs LLC · PMA PQ5259NM · Replaces W1290-28 T7512-24 CMA7512-24 A7512-24… · Oct 15, 2019 - [11-7512-12](https://drs.faa.gov/browse/excelExternalWindow/15B9E3C4C8B5041B8625857000502771.0001): Polaris 12VDC. AeroLEDs LLC · PMA PQ5259NM · Replaces A7512-12 W1290-14 T7512-12 CMA7512-12… · Oct 15, 2019 - [9100-001-C](https://drs.faa.gov/browse/excelExternalWindow/DD343890DCD8BFDB86258569004013FB.0001): MaxDim Lamp Intensity Controller. Seaton Engineering Corporation · PMA PQ2574NM · Modification part · Sep 3, 2019 All of them: https://openairdocs.org/model/air-tractor-at-401a/pma.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.