Installation electrostatic spray equipment and controls.
FAA holder: Zee Systems Inc.
Aircraft STC directory
Air Tractor AT-501 STCs
The cited FAA DRS record snapshots contain 36 selected supplemental type certificates with status Current whose public applicability data names the Air Tractor AT-501. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
36
listed Current at snapshot
22
holder directories
7
modification categories
Jun 18, 2026
latest recorded revision
Modification demand surface
Recorded holders
Electronics International Inc.4Airwolf Filter Corporation3Acron Aviation Inc.2ADS-B Technologies, LLC2Seaton Engineering Corp.2Turbine Conversions Ltd2R-S Sales Inc.2Zee Systems Inc.1Kawak Aviation Technologies Inc1A & L Aircraft Parts Inc1Latitude Technologies Corporation1Hershey Flying Service Inc1Avidyne Corporation1AMSAFE Inc.1Garmin International Inc1Aero Spraying Service Inc.1Micro AeroDynamics Inc1Reabe Aircraft Improvement Inc1P2 Incorporated1Precise Flight Inc1
Recently revised AT-501 STCs
Showing the 36 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
Installation of L-3 Communications Avionics Systems.
FAA holder: Acron Aviation Inc.
Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500).
FAA holder: Acron Aviation Inc.
Installation of a Lever Throttle Quadrant.
FAA holder: Kawak Aviation Technologies Inc
Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed.
FAA holder: ADS-B Technologies LLC
Installation of Airwolf Filter Corp. Air Oil Separator.
FAA holder: Airwolf Filter Corporation
Installation of Gustin Aviation chip detector light system.
FAA holder: A & L Aircraft Parts Inc
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
FAA holder: Seaton Engineering Corp.
Fabrication and installation of Landing Light Controller.
FAA holder: Seaton Engineering Corp.
Installation of Latitude Technologies Skynode S200 Satcom system.
FAA holder: Latitude Technologies Corporation
Installation of Sky-Tractor Model200 Scavenge oil filter system.
FAA holder: Airwolf Filter Corp
Installation of a Cable Cutter System on the Main Landing Gear.
FAA holder: Hershey Flying Service Inc
Installation of Garmin GDL 88 ADS-B UAT Transceiver System.
FAA holder: Garmin International Inc
Approval of the L-3 Communications NGT 2000/2500 ADS-B system.
FAA holder: ADS-B Technologies, LLC
Installation of winglets.
FAA holder: Aero Spraying Service Inc.
Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30P.
FAA holder: Electronics International Inc.
Installation of Rotary Gatekeeper and provisions equipment.
FAA holder: Turbine Conversions Ltd
Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30C.
FAA holder: Electronics International Inc.
Installation of Vortex Generators on the wings.
FAA holder: Micro AeroDynamics Inc
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.
FAA holder: Reabe Aircraft Improvement Inc
Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1).
FAA holder: Electronics International Inc.
Installation of a Time Trac Data Recorder.
FAA holder: P2 Incorporated
Installation of Electronics International digital volt/amp gauges and accessories.
FAA holder: Electronics International Inc.
Precise Flight Inc. Pulselite Control System.
FAA holder: Precise Flight Inc
Installation of Pratt & Whitney Engine Services, Inc. Aircraft Data Acquisition System ADAS+, P/N ADAS-K-010.
FAA holder: Pratt & Whitney Engine Services Inc.
Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B.
FAA holder: Scale Modelbuilders Inc.
Installation of an electronic digital engine tachometer horizon model P-1000.
FAA holder: Horizon Instruments Inc
Installation of a Walter M601E-11 turboprop engine and a Avia Hamilton Standard VJ8.510AG propeller .
FAA holder: Riddell Flying Service, Inc.