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Aircraft STC directory

Air Tractor AT-301 STCs

The Jun 30, 2026 FAA DRS snapshot contains 53 selected supplemental type certificates with status Current whose public applicability data names the Air Tractor AT-301. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

53
listed Current at snapshot
26
holder directories
8
modification categories
Mar 1, 2025
latest recorded revision

Modification demand surface

Other aircraft modifications29Engine and powerplant12Fuel systems3Avionics2Aircraft connectivity2Propellers2Aircraft structures2Landing gear and brakes1

Recorded holders

Electronics International Inc.5Airwolf Filter Corporation3J P Instruments3Avidyne Corporation2Seaton Engineering Corp.2Turbine Conversions Ltd2Reabe Aircraft Improvement Inc2M-20 Oil Separators LLC2Pacific Propeller International LLC2R-S Sales Inc.2Kawak Aviation Technologies Inc1Lanitz-Prena Folien Factory GmbH1Cascade Flying Service LLC1A & L Aircraft Parts Inc1Latitude Technologies Corporation1Cascade Aircraft conversions LLC1Hershey Flying Service Inc1AMSAFE Inc.1Aviation Products Systems Inc.1Aero Spraying Service Inc.1

Recently revised AT-301 STCs

Showing the 53 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA00888SEEngine and powerplant

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.

FAA holder: Cascade Flying Service LLC

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