# STCs that may be installed: N406SD A list on [N406SD](https://openairdocs.org/aircraft/N406SD.md). Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do. In force first, then newest. Page 1 of 2 · 90 STCs - [STC SA04837NY](https://openairdocs.org/stc/SA04837NY.md): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights · AeroLED's Holdings, LLC - [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D.md): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System · Garmin International Inc. - [STC SA02511SE](https://openairdocs.org/stc/SA02511SE.md): Installation of replacement fuel quantity indicator sending unit(s) · CiES Inc. - [STC SA02738CH](https://openairdocs.org/stc/SA02738CH.md): Installation of L-3 Communications Avionics Systems · Acron Aviation Inc. - [STC SA04046CH PAGE 2](https://openairdocs.org/stc/SA04046CH%20PAGE%202.md): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500) · Acron Aviation Inc. - [STC SA00279SE](https://openairdocs.org/stc/SA00279SE.md): Installation of American Aviation Inc. redesigned engine exhaust stacks. · American Aviation Inc. - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE.md): Installation of Garmin GI 275 Multi-Function Display System · Garmin International Inc. - [STC SA02444AK](https://openairdocs.org/stc/SA02444AK.md): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed · ADS-B Technologies LLC - [STC SA09856AC](https://openairdocs.org/stc/SA09856AC.md): Installation of BendixKing Aerowave 100 In-flight Data Link System for non-essential, non-required aircraft Cabin Systems & Equipments · Honeywell International Inc (Bendix King) - [STC SA11174SC PAGE 2](https://openairdocs.org/stc/SA11174SC%20PAGE%202.md): Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems · Honeywell International Inc (Bendix King) - [STC SA00401BO](https://openairdocs.org/stc/SA00401BO.md): Installation of a SkyTrax100B UAT receiver · Avidyne Corporation - [STC SA02426AK](https://openairdocs.org/stc/SA02426AK.md): Approval of the FreeFlight FDL-978-TX ADS-B system installed · FreeFlight Systems - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH.md): Installation of Airwolf Filter Corp. Air Oil Separator · Airwolf Filter Corporation - [STC SA01452CH](https://openairdocs.org/stc/SA01452CH.md): Installation of an air ambulance conversion kit. · Med-Pac Inc. - [STC SA01714WI](https://openairdocs.org/stc/SA01714WI.md): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. · Garmin International Inc - [STC SA00344BO PAGE 2](https://openairdocs.org/stc/SA00344BO%20PAGE%202.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies - [STC SA00765DE](https://openairdocs.org/stc/SA00765DE.md): Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensor · Peregrine - [STC SA02153LA-D PAGE 2](https://openairdocs.org/stc/SA02153LA-D%20PAGE%202.md): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System · Garmin International Inc. - [STC SA02132AK](https://openairdocs.org/stc/SA02132AK.md): Reduction/limitation of passenger seats to 9. · Hageland Aviation Services, Inc - [STC SA02212AK](https://openairdocs.org/stc/SA02212AK.md): Replacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systems · Seaplanes North LLC - [STC SA02428SE](https://openairdocs.org/stc/SA02428SE.md): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft · Henry F Rogers/David E Polley - [STC SA00343BO](https://openairdocs.org/stc/SA00343BO.md): Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release) · Avidyne Corporation - [STC SA00352BO PAGE 2](https://openairdocs.org/stc/SA00352BO%20PAGE%202.md): Installation of an Avidyne Corporation Mode A/C/S Transponder with ADS-B Out capability, Model AXP340 loaded with Version 3.13 software (or later FAA approved version), · Avidyne Corporation - [STC SA02119SE PAGE 2](https://openairdocs.org/stc/SA02119SE%20PAGE%202.md): Installation of Garmin GDL 88 ADS-B UAT Transceiver System · Garmin International Inc - [STC SA02442AK PAGE 2](https://openairdocs.org/stc/SA02442AK%20PAGE%202.md): Approval of the L-3 Communications NGT 2000/2500 ADS-B system · ADS-B Technologies, LLC - [STC SA02121SE](https://openairdocs.org/stc/SA02121SE.md): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System · Garmin International Inc - [STC SA02016SE-D](https://openairdocs.org/stc/SA02016SE-D.md): Installation of Garmin GTS 800, GTS 820 or GTS 850 Traffic System · Garmin International Inc - [STC SA02168AK](https://openairdocs.org/stc/SA02168AK.md): Installation of hourmeter airspeed switch. For unpressurized aircraft only. Pressurized aircraft must have pressurization system deactivated. · Avalaska Inc - [STC SA00198WI](https://openairdocs.org/stc/SA00198WI.md): Installation of R134a Air Conditioning System · Guernsey Co - [STC SA00765DE PAGE 1](https://openairdocs.org/stc/SA00765DE%20PAGE%201.md): Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensor · Peregrine - [STC SA02019SE-D PAGE 2](https://openairdocs.org/stc/SA02019SE-D%20PAGE%202.md): Installation of Garmin GTN 6XX/7XX Navigation System · Garmin International Inc - [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D.md): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System · Garmin International Inc - [STC SA02153LA](https://openairdocs.org/stc/SA02153LA.md): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. · Garmin AT Inc. - [STC SE12225AC](https://openairdocs.org/stc/SE12225AC.md): This STC will incorporate P&W 1700 rpm propeller reduction gearbox on P&WC engines to allow 1700 rpm propeller installation · High Cotton Aircraft Conversions, LLC · Lists PT6A-41 - [STC SE00010EN](https://openairdocs.org/stc/SE00010EN.md): Instructions for Continued Airworthiness for the PT6A-25, and, -25A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-25 - [STC SE000010EN](https://openairdocs.org/stc/SE000010EN.md): Instructions for Continued Airworthiness for the PT6A-25 and PT6A-25A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company, Inc. · Lists PT6A-25 - [STC SE000011EN](https://openairdocs.org/stc/SE000011EN.md): Instructions for Continued Airworthiness for the PT6A-25C engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company, Inc. · Lists PT6A-25C - [STC SE00001EN](https://openairdocs.org/stc/SE00001EN.md): Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 2, 8/16/95. · MORE Company Inc · Lists PT6A-38 - [STC SE00002EN](https://openairdocs.org/stc/SE00002EN.md): Instructions for Continued Airworthiness for the PT6A-34, -34AG, -34B, -36, -114, -114A, -116, -135, and -135A engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-114 - [STC SE00003EN](https://openairdocs.org/stc/SE00003EN.md): Instructions for Continued Airworthiness for the PT6A-6/C20, -20, -20A and, -20B engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-20 - [STC SE00004EN](https://openairdocs.org/stc/SE00004EN.md): Instructions for Continued Airworthiness for the PT6A-11, -11AG, -15AG, -110 and-112 engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-11 - [STC SE00006EN](https://openairdocs.org/stc/SE00006EN.md): Instructions for Continued Airworthiness for the PT6A-45A, -45B, and, -45R engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-45A - [STC SE00011EN](https://openairdocs.org/stc/SE00011EN.md): Instructions for Continued Airworthiness for the PT6A-25C engine model that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. · MORE Company Inc · Lists PT6A-25C - [STC SE000EN](https://openairdocs.org/stc/SE000EN.md): Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95. · MORE Company Inc · Lists PT6A-21 - [STC SE10947SC](https://openairdocs.org/stc/SE10947SC.md): The conversion of the Pratt & Whitney Canada, Model PT6A-21 to a PT6A-28 turboprop engine · Prime Turbines · Lists PT6A-21 - [STC SE00482SE](https://openairdocs.org/stc/SE00482SE.md): Incorporation of turbine engine into a twin power section turboprop assembly. · Fifty-Ten-Yankee LLC · Lists PT6A-114A - [STC SE10552SC](https://openairdocs.org/stc/SE10552SC.md): Conversion of Pratt & Whitney Canada Corp. Model PT6A-27 or -28 to a Model PT6A-34 turboprop engine. · Prime Turbines LLC · Lists PT6A-27 - [STC SE11139SC](https://openairdocs.org/stc/SE11139SC.md): The conversion of the Pratt & Whitney Canada, Model PT6A-135 to a PT6A-135A turboprop engine · Airforce Turbine Service · Lists PT6A-135 - [STC SE11141SC](https://openairdocs.org/stc/SE11141SC.md): The conversion of the Pratt & Whitney Canada, Model PT6A-15AG to a PT6A-34AG turboprop engine · RT Turbines Inc · Lists PT6A-15AG - [STC SE02170AT](https://openairdocs.org/stc/SE02170AT.md): Installation of Pc Safety Valve Kit · Bell Helicopter Textron Inc. · Lists PT6A-27 Next page: https://openairdocs.org/aircraft/N406SD/stcs.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT m.matched_by, s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model FROM ( SELECT stc_number, min(side) AS side, arg_min(matched_by, side) AS matched_by, arg_min(matched_model, side) AS matched_model FROM (SELECT stc_number, 1 AS side, 'airframe' AS matched_by, matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code = '7535723' UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '52032') GROUP BY stc_number ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number) ORDER BY m.side, s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/aircraft/N406SD/stcs --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.