Cessna 421C

STCs that may be installed · 258

In force first, then newest. The registry doesn’t record which STCs an aircraft has.

Query with SQL
duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
  FROM (
    SELECT stc_number, min(matched_model) AS matched_model
    FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet'
    WHERE aircraft_model_code IN ('2076016', '2076017')
    GROUP BY stc_number
  ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
  ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

STC SA00765DEInstallation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensorPeregrineSTC SA04112CHInstallation of Appareo Systems, LLC Stratus ESG ADS-B transponderAppareo Systems LLC.STC SA09751DSInstallation of an S-TEC 01326 Digital Flight Control System (DFCS)S-TEC CorporationSTC SA04165NYInstallation of Latitude Technologies Skynode S200 Satcom system must be performedLatitude Technologies CorporationSTC SA02153LA-D PAGE 1Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) SystemGarmin International Inc.STC SA02503AKInstallation of AMSAFE State of the Art Restraint System (SOARS) inflatable restraintsAMSAFE Inc.STC SA02013CHInstallation of Avidyne Corporation Traffic Advisory System (TAS)Avidyne CorporationSTC SA01828SEInstallation of J.P. Instruments (JPI) EDM-960 Primary Engine Data Management SystemJ. P. InstrumentsSTC SA01835WIInstallation of Trig Avionics TY-96 or TY-97 VHF Communications RadioPeregrineSTC SA2872SWInstallation of wing nacelle locker tanks.OCR AviationSTC SA01933LA-DInstallation of Garmin Model 400W / 500W Series GPS-WAAS Navigation SystemGarmin International IncSTC SA01935LAInstallation of external aft body strakes.Aircraft Performance ModificationsSTC SA02212AKReplacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systemsSeaplanes North LLCSTC SA2586NMInstallation of J.P. Instruments temperature monitoring systems.J P InstrumentsSTC SA1663NMAddition of fowler wing flaps, elevator trim spring with cockpit tension select lever, fuselage strakes, and nacelle strakes.Sierra Industries Ltd.STC SA438NWAddition of Fowler wing flaps aileron droop system, elevator trim spring and new flap actuation system.Sierra Industries IncSTC SA01114CHInstallation of P2 Incorporated 6600 Audio Advisory systemP2 IncorporatedSTC SA1361SOReplaces original reciprocating engines with Pratt & Whitney of Canada PT6A-135 or PT6A-112 turbopropeller engines and related changes.American Aviation Industries LLCSTC SA00343BOInstallation 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 CorporationSTC SA2514CEInstallation of wing nacelle locker tanks and fuel transfer system.Griggs Aircraft Refinishing LLCSTC SA00352BO PAGE 1Installation 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 CorporationSTC SA01734SEApplication of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts.Andrew D. HumphreySTC SA1048GLInstall Egan Aviation air ambulance stretcher P/N 125 using Installation Kit P/N 801.Paul/ Lanna Egan LLCSTC SA00780SEInstallation of the True Lock Safety Retention Axle Lock Nut SystemTrue Lock LLCSTC SA01118WIInstallation of the Concorde FLA or VRSLA RG series batteriesConcorde Battery CorporationSTC SA11172SCInstallation of an ADS600-B Automatic Dependent Surveillance-Broadcast (ADS-B) Universal Access Transceiver (UAT) and Global Positioning System (GPS) antennaNavWorx IncSTC SA03019ATInstallation of a Taxi Light SystemReds Aircraft Service, Inc.STC SA00149BOInstallation of Aircraft Components, Inc. Volt and Vac Alert System, P/N 2044-1Aircraft Components IncSTC SA00944CHReplace Janitrol combustion heater Model 81D94-X (XX) with C&D Associates combustion heater Model CD25K, CD35K, and CD45KHartzell Engine Technologies, LLCSTC SA02547ATInstallation of a Voice Alert System.Aircraft Components IncSTC SA03658ATInstallation of a Voice Alert System to incorporate as primary annunciators for stall and gear warningsAircraft Components IncSTC SA02119SE PAGE 1Installation of Garmin GDL 88 ADS-B UAT Transceiver SystemGarmin International IncSTC SA01969SEInstallation of a Mid-Continent MD302 Standby Attitude ModuleMid-Continent Instruments and AvionicsSTC SA01229SE PAGE 1Installation of GNS 480 (CNX80) GPS WAAS Navigator with integrated VHF Navigation and Communication radiosGarmin International IncSTC SA02430LAInstallation of fiberglass dome hubcaps on Cleveland 40-135, 40-135A, 40-138A, 40-169 and Goodyear 500364 wheels with various attach brackets and associated parts using existing or new hardware as appropriate to outer wheel halvesPremiere-Aviation, Inc.STC SA02442AK PAGE 1Approval of the L-3 Communications NGT 2000/2500 ADS-B systemADS-B Technologies, LLCSTC SA01933LA-D PAGE 1Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation SystemGarmin International IncSTC SA01669CHInstallation of Challenger Reusable Air FilterChallenger Aviation Products Inc.STC SA02930NYInstallation of Insight Instrument Corporation Graphic Engine Monitor (GEM 610C) models G3, G2, and G1 and 1200C model G4 as primary Cylinder Head Temperature (CHT), Exhaust Gas Temperature (EGT), and Turbine Inlet Temperature (TIT) InstrumentsInsight Instrument CorporationSTC SA02283SE PAGE 2Installation of Electronics International Inc. Glass Panel Engine Monitor (with In Flight Data) CGR-30PElectronics International Inc.STC SA02402SE PAGE 1Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) CGR-30CElectronics International Inc.STC SA02121SEInstallation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic SystemGarmin International IncSTC SA00269BOInstallation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Antenna P/N S72-1715-1 with doubler plate P/N S72-171530-1, and Avidyne Mounting Tray P/N 700-00034-000.Avidyne CorporationSTC SA02717NY PAGE 2Installation of VoiceFlight Systems LLC VFS101 Speech Recognition ModuleVoiceFlight Systems LLCSTC SA10801SC-DInstall wheel hub capsRAM Aircraft Limited PartnershipSTC SA4913NMInstallation of spoiler system.Spoilers IncSTC SA1776WEInstallation of Brittain Industries Model B-5 Flight Control SystemBrittain Industries, Inc · Lists 421 SeriesSTC SA1146SOInstallation of nose cone erosion cap.Bell Helicopter Textron Inc.STC SA00432SEInstallation of EGT 701 series fuel flow instrument.J P InstrumentsSTC SA00861SEInstallation of J.P. Instruments (JPI) fuel flow indicating systemJ P Instruments
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