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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 modifications29
Engine and powerplant12
Fuel systems3
Avionics2
Aircraft connectivity2
Propellers2
Aircraft structures2
Landing 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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