Cessna 421

STCs approved for this model · 263

Current certificates first.

Query with SQL
duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date
  FROM 'https://openairdocs.org/data/latest/faa_stc.parquet' s
  WHERE s.stc_number IN (SELECT stc_number FROM 'https://openairdocs.org/data/latest/faa_stc_model.parquet' WHERE model_key = '421')
  ORDER BY s.status = 'Current' 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 SA00057SEInstallation of emergency medical stretcher, oxygen, and electrical systems.LifePort LLCSTC SA00061LAInstallation of JPI digital tachometer.J P InstrumentsSTC SA00068SEInstallation of fuel flow/pressure instruments. (W/TSIO-360-MB1)Electronics International Inc.STC SA00079NYInstallation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less.Airwolf Filter CorporationSTC SA00103WIInstallation of a heated windshield panelAviation Fabricators IncSTC SA00149BOInstallation of Aircraft Components, Inc. Volt and Vac Alert System, P/N 2044-1Aircraft Components IncSTC SA00161BO (2 OF 3Installation of Avidyne Corporation FlightMax 700-00007-( ) EX500 Multi-Function Display.Avidyne CorporationSTC SA00165BOInstallation of Avidyne Corporation Datalink Coupler, part number 700-00015-000 per Avidyne Corporation Master Document List, Document No. AVACP-006 dtd 1/2/93 or later FAA-approved revisions.Avidyne CorporationSTC SA00228NYInstallation of Sky Harbour Aircraft Refinishing Ltd Ice Damage Prevention Plates.Sky Harbour Aircraft RefinishingSTC SA00243BO (3 OF 5)Installation of Centurion Consulting, Inc. GPS Steering Assist Module (SAM) with roll steering (p/n 0025-5100), or without roll steering (p/n 0025-5200).Icarus Avionics, LLCSTC 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 SA00281BOInstallation of Avidyne Corporation MLX770 MultiLink Broadcast Transceiver P/N 700-00163-( ), Sensor Systems Inc. Antenna P/N S67-1575-109, or equivalent, and optional Avidyne Mounting Tray P/N 700-00165-000Avidyne CorporationSTC SA00290BOInstallation of Avidyne Corporation Part Number 700-00167-XXX Multi-Function Display and Mounting Tray Assembly Part Number 700-00168-XXXAvidyne CorporationSTC SA00308WIInstallation of replacement wing rear spar capsCallahan Aircraft ServicesSTC SA00329SEInstallation of vortex generators on wings and vertical stabilizer.Aeronautical Testing Service Inc.STC 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 SA00344BO PAGE 1Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.Whelen Aerospace TechnologiesSTC 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 SA00404WIInstallation of a starter engagement indication system.Miller Aviation, IncSTC SA00419NYInstallation of cockpit utility light.Burns Richard GSTC SA00432SEInstallation of EGT 701 series fuel flow instrument.J P InstrumentsSTC SA00537SEInstallation of vortex generators on the wing and rudder surfaces, and installation of nacelle strakes.Micro AeroDynamics IncSTC SA00680SE (4 OF 6Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.Electronics InternationalSTC SA00709LAInstallation of control wheel. Includes provisions only for a push-to-talk (PTT) switch. Separate FAA approval of PTT switch is required.Trevor Burward-HoySTC SA00729SEInstallation of twin temperature indicating system with fuel flow in accordance with J.P. Instruments (JPI) Installation manual Report No. 760, Revision -, dated 7/20/99, or later FAA approved revision.J P InstrumentsSTC SA00744DEInstallation of the Automatic Dependent Surveillance Broadcast (ADS-B) Out Equipment using a Trig Avionics TT31 Transponder and an approved position sensorPeregrineSTC SA00747ATInstallation of left hand and right hand inboard fuel cell assemblies.FFC ManufacturingSTC SA00749ATModification of flush type fuel caps for installation of a locking cylinder and keeper. (1964 and subsequent)Aero Trim, IncSTC SA00756DEInstallation of Automatic Dependent Surveillance Broadcast (ADS-B) Out Equipment using a Trig Avionics TT22 Transponder and an approved Global Positioning System (GPS) Position SensorPeregrineSTC SA00761ATInstallation of left and right side fuel cell assemblies.FFC ManufacturingSTC SA00765DEInstallation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensorPeregrineSTC SA00780SEInstallation of the True Lock Safety Retention Axle Lock Nut SystemTrue Lock LLCSTC SA00804SEInstallation of an engine failure indicator system, also referred to as a 'low Thrust Detector system.'Advanced Aero Safety Inc.STC SA00823CHInstallation of various de-icer wire harnesses.SMR TechnologiesSTC SA00833WIInstallation of a seat headrest.Aviation Fabricators IncSTC SA00861SEInstallation of J.P. Instruments (JPI) fuel flow indicating systemJ P InstrumentsSTC SA00944CHReplace Janitrol combustion heater Model 81D94-X (XX) with C&D Associates combustion heater Model CD25K, CD35K, and CD45KHartzell Engine Technologies, LLCSTC SA00948CHInstallation of various de-icer wire harnesses. (E90 modified by STC SA3593NM, F90 modified by STC SA4131NM, B200 modified by STC SA2698NM-S, DHC-6 Series modified by STC SA3532NM)SMR Technologies IncSTC SA01085LAInstallation of the VNS 1000 Voice Navigation System.VNS IncorporatedSTC SA01105WI-D (1 OF 2)Installation of Bendix/King KMD 550/850 Multi-Function Display System with Optional Traffic, Terrain and Weather Sensors. This STC also is approved for some single-engine aircraft. See SA01105WI-D (2 of 2).Honeywell International Inc.STC SA01114CHInstallation of P2 Incorporated 6600 Audio Advisory systemP2 IncorporatedSTC SA01118WIInstallation of the Concorde FLA or VRSLA RG series batteriesConcorde Battery CorporationSTC SA01158WIInstallation of Aero Enhancements UV250-1 Supplemental Instrument Panel Lightning System.Aero Enhancements Inc.STC SA01205WI-D (1 OF 2)Installation of the KMD 250 Multi-Function Display System with Optional Internal VFR GPS and Optional Traffic and Weather Sensors.Honeywell International IncSTC SA01213CHInstall air ambulance conversion in accordance with Spectrum Aeromed Inc. Drawings as listed on AML SA01213CH, or later FAA approved revision.Spectrum Aeromed LLC dba Spectrum AeromedSTC SA01229SE PAGE 1Installation of GNS 480 (CNX80) GPS WAAS Navigator with integrated VHF Navigation and Communication radiosGarmin International IncSTC SA01316LAInstallation of Sandel Avionics Terrain Awareness and Warning System.Sandel Avionics LLCSTC SA01420WIInstallation of Garmin GNS 430A / 530A COMM/NAV/GPS Systems. Data required: (1) Scandinavian Avionics Design GmbH Drawing List 2027438-DL-02, Issue 2; or later EASA approved revisions. (2) Scandinavian Avionics Design GmbH Approved Aircraft Flight Manual Supplement, Doc. 2027438-AM-02A, Issue 1, and Doc. 2027438-AM-02B, Issue 2, both approved by EASA under approval No. EASA.A.S.01389 dated 07-09-2005, or later EASA approved revision.Scandinavian Avionics Design GmbHSTC SA01436SE (1 OF 2)Cockpit sunvisor retrofit kit.Rosen Sunvisor Systems LLCSTC SA01452CHInstallation of an air ambulance conversion kit.Med-Pac Inc.
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