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FAA-listed STC holder

Cascade Flying Service LLC STCs

The Jun 30, 2026 FAA DRS snapshot lists 7 selected supplemental type certificates with status Current under Cascade Flying Service LLC. The records span 43 public aircraft directories and 3 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

7
listed Current at snapshot
43
aircraft directories
3
modification categories
Mar 3, 2021
latest recorded revision

Modification mix

Engine and powerplant5Other aircraft modifications1Propellers1

Aircraft represented

Air Tractor AT-80270 STCsAir Tractor AT-802A69 STCsAir Tractor AT-50260 STCsAir Tractor AT-40259 STCsAir Tractor AT-502B55 STCsAir Tractor AT-40154 STCsAir Tractor AT-402A54 STCsAir Tractor AT-60254 STCsAir Tractor AT-30153 STCsAir Tractor AT-402B52 STCsAir Tractor AT-502A48 STCsAir Tractor AT-40047 STCsAir Tractor AT-401B46 STCsAir Tractor AT-400A42 STCsAir Tractor AT-30039 STCsAir Tractor AT-401A38 STCsThrush Aircraft S2R-T3436 STCsAir Tractor AT-30234 STCsAir Tractor AT-503A30 STCsThrush Aircraft S2R-T1530 STCs

Recently revised records

Showing the 7 most recently revised records. Category directories provide the complete paginated discovery path.

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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SA01420SEEngine and powerplant

Install a Walter M601-E11 or M601-D11 engine and Avia V508-E-AG 106/A propeller per Cascade Aircraft Conversions Master Drawing List FW-CAC090-90 Revision B, dated August 10, 2004, and Cascade Aircraft Conversions Document FW-CAC090-12, Revision IR, dated June 2, 2004, Installation Manual for Thrush Aircraft S2R Series, Walter Turbine Installation or later FAA approved revisions to either of these documents.

FAA holder: Cascade Flying Service LLC

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