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No. of STCs: 22

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00766SE	Status: Current	App Date: 10/19/1999	Rev Date: 01/11/2000
Description: Installation of Hamilton Standard 3D40 Hub with Pacific Propeller AG-100-2 propeller blades
TC Nos.: A17SW
Models: Air Tractor Inc.AT-401
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date: 10/24/1997	Rev Date: 07/09/2009
Description: Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and a Avia V508-E-AG 106/A propeller. Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller 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.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503A
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date: 10/24/1997	Rev Date: 04/25/2008
Description: Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and a Avia V508-E-AG 106/A propeller. Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller 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.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Current	App Date: 10/24/1997	Rev Date: 03/03/2021
Description: 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.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503A
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date: 10/24/1997	Rev Date: 06/18/2004
Description: Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and a 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 either of these documents. 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 either of these documents. NOTE: The Air Tractor model AT-400 and AT-402B airplanes are not eligible for modification under option
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date: 10/24/1997	Rev Date: 03/23/2018
Description: Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and a Avia V508-E-AG 106/A propeller. Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller 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.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503A
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date: 10/24/1997	Rev Date: 10/15/2004
Description: Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and a 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 either of these documents. 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 either of these documents. NOTE: The Air Tractor model AT-400 and AT-402B airplanes are not eligible for modification under option
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00888SE	Status: Historical	App Date:	Rev Date: 03/12/2001
Description: Installation of a Walter M601-E11 engine and Hartzell HC-B3TW-3/T10282N+4 propeller.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00905SE	Status: Current	App Date: 08/20/2000	Rev Date: 03/23/2018
Description: Install modified engine cowl.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00905SE	Status: Historical	App Date: 08/20/2000	Rev Date: 10/15/2004
Description: Install modified engine cowl.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA00905SE	Status: Historical	App Date: 08/20/2000	Rev Date: 07/12/2013
Description: Install modified engine cowl.
TC Nos.: A17SW, A9SW
Models: Air Tractor Inc.AT-400, AT-400A, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01402SE	Status: Historical	App Date: 02/18/2004	Rev Date: 10/22/2010
Description: Install modified engine cowl.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S2R-T11, S2R-T15, S2R-T34, S2R-T45, S2R-T65, S2R-T660, S2RHG-T34, S2RHG-T65
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01402SE	Status: Current	App Date: 02/18/2004	Rev Date: 03/23/2018
Description: Install modified engine cowl.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S2R-T11, S2R-T15, S2R-T34, S2R-T45, S2R-T65, S2R-T660, S2RHG-T34, S2RHG-T65
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01402SE	Status: Historical	App Date: 02/18/2004	Rev Date: 04/10/2015
Description: Install modified engine cowl.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S2R-T11, S2R-T15, S2R-T34, S2R-T45, S2R-T65, S2R-T660, S2RHG-T34, S2RHG-T65
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01420SE	Status: Historical	App Date: 03/09/2001	Rev Date: 10/15/2004
Description: 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.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S-2R, S2R-R1340, S2R-R1820, S2R-R3S
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01420SE	Status: Historical	App Date: 03/09/2001	Rev Date: 01/14/2009
Description: 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.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S-2R, S2R-R1340, S2R-R1820, S2R-R3S
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01420SE	Status: Current	App Date: 03/09/2001	Rev Date: 03/23/2018
Description: 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.
TC Nos.: A4SW
Models: Thrush Aircraft Inc.S-2R, S2R-R1340, S2R-R1820, S2R-R3S
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01560SE	Status: Current	App Date: 05/12/1995	Rev Date: 03/23/2018
Description: Install modified engine cowl per Cascade Flying Service LLC data
TC Nos.: A17SW, A19SW
Models: Air Tractor Inc.AT-502A, AT-602, AT-802, AT-802A
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01560SE	Status: Historical	App Date: 05/12/2005	Rev Date: 06/03/2005
Description: Install modified engine cowl per Cascade Flying Service LLC data
TC Nos.: A19SW
Models: Air Tractor Inc.AT-602, AT-802, AT-802A
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA01560SE	Status: Historical	App Date: 05/12/1995	Rev Date: 08/12/2008
Description: Install modified engine cowl per Cascade Flying Service LLC data
TC Nos.: A17SW, A19SW
Models: Air Tractor Inc.AT-502A, AT-602, AT-802, AT-802A
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01845SE	Status: Current	App Date: 09/18/2007	Rev Date: 03/23/2018
Description: Installation of a barrier air filtration system
TC Nos.: 2H3, 4H11
Models: Scotts-Bell 47 Inc47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A Siam Hiller Holdings Inc.UH-12E, UH-12E-L
ACO: AIR-770: West Certification Branch SEA

STC Holder: Cascade Flying Service LLC 903 Grinnell Road, Garfield, WA 99130, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01845SE	Status: Historical	App Date: 09/18/2007	Rev Date: 05/23/2008
Description: Installation of a barrier air filtration system
TC Nos.: 2H3, 4H11
Models: Scotts-Bell 47 Inc47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A Siam Hiller Holdings Inc.UH-12E, UH-12E-L
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500