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 SA00823CHInstallation of various de-icer wire harnesses.SMR TechnologiesSTC SA02520ATInstallation of M-20 Oil Separator, model 600-WP.M-20 Oil Separators LLCSTC 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 SA1401GLInstall air ambulance conversion.Fargo Jet CenterSTC SA802NEInstallation of Cessna SK310-114-0 electric windshield heated panel installation kit.Aviation Management Services, IncSTC SA09544SCInstallation of a wastegate in-line oil strainerRAM Aircraft Limited PartnershipSTC SA4592SWInstallation of improved engine cooling baffle and improved exhaust system slip joints.RAM Aircraft Limited PartnershipSTC SA4851SWInstallation of combination aft position/strobe light on aircraft tail stinger.RAM Aircraft Limited PartnershipSTC SA5811SWIncrease maximum ramp weight to 7610 pounds; maximum takeoff weight to7560 pounds; maximum landing weight is 7200 pounds; decrease zero fuel weight to 6533 pounds; install wingletsRAM Aircraft Limited PartnershipSTC SA5878SWInstallation of range-marked EGT, CHT, oil temperature, and pressure gauges.RAM Aircraft Limited PartnershipSTC SA5981SWIncrease maximum ramp weight to 7610 pounds, maximum takeoff weight to 7560 pounds, maximum landing weight is 7200 pounds, maximum zero fuel weight is 6533 pounds.RAM Aircraft Limited PartnershipSTC SA7594SWInstallation of Cablecraft throttle, mixture, and propeller control cables.RAM Aircraft Limited PartnershipSTC SA08996AC-DInstallation of S-TEC System 55/55X Two Axis automatic flight guidance system, Model ST-578S-TEC CorporationSTC SA2687NMInstallation of Truboplus/ Electronics Int'l gauges and switches.Aero Manufacturing Inc.STC SA01117ATInstallation of Composite Spinner.TCB Composite Co.STC SA01280CHInstallation of Challenger Spin-On Oil Filters.(For Cessna 182 model, s/n 67042 and up) (For Cessna 421C model, s/n 1017 thru 1404)D & K AviationSTC SA00804SEInstallation of an engine failure indicator system, also referred to as a 'low Thrust Detector system.'Advanced Aero Safety Inc.STC SA3003WEInstallation of recognition light assembly on horizontal stabilizerDeVore Aviation Corporation of America, a New Mexico CorporationSTC SA00833WIInstallation of a seat headrest.Aviation Fabricators IncSTC SA00381DEModification of the Cessna 421C for installation of a Space Imaging System.Space ImagingSTC SA09517SCInstallation of a children's critical care childs stretcher assembly, p/n 100-1.Children's Critical Care, IncSTC SA1007NWInstallation of a low thrust detector system.Engine-Out Warning Systems, LLCSTC SA2780SWInstallation of Hoskins Model CFS-2000, -20001, or FT-2000 fuel flow indicating system.Sandia Aerospace CorporationSTC SA00749ATModification of flush type fuel caps for installation of a locking cylinder and keeper. (1964 and subsequent)Aero Trim, IncSTC SA5925NMInstallation of oil pressure/temperature instrument.Electronics InternationalSTC SA5924NMInstallation of RPM instrument.Electronics InternationalSTC SA00015SEInstallation of a vortex generator system on wing and vertical tail.Aeronautical Testing Service Inc.STC SA7790SW-DInstallation of S-TEC system 60 two axis automatic flight guidance system, model ST-398.S-TEC CorporationSTC SA7787SW-DInstallation of S-TEC System 65 two axis automatic flight guidance system, model ST-397.S-TEC CorporationSTC SA00228NYInstallation of Sky Harbour Aircraft Refinishing Ltd Ice Damage Prevention Plates.Sky Harbour Aircraft RefinishingSTC SA807EAInstallation of radome.Norton CompanySTC SA4293WERemoval of original equipment engines and propellers and installation of two Lycoming LTP101-600A-1A turbo-propeller engines and two three-bladed Hartzell HC-B3TN-3C/T10173-13Q propellers and controls including a major fuel system modification.Turbine Conversions IntSTC SA3415SW-DInstallation of Century automatic flight system kit No. AK918/FD consisting of Century 41 autopilot/flight director.Century Flight Systems IncSTC SA00404WIInstallation of a starter engagement indication system.Miller Aviation, IncSTC SA00061LAInstallation of JPI digital tachometer.J P InstrumentsSTC SA7788SW-DInstallation of S-TEC yaw damper system, model ST-401.S-TEC CorporationSTC SA3463SW-DInstallation of Century automatic flight system, Model AK968 consisting of a Century 2110/2130/2131 autopilot.Century Flight Systems IncSTC SA8922SWInstallation of replacement Ultimate Engine Oil Filter for Textron Lycoming and Teledyne Continental engines. (411 S/N 000 THRU 0126, S/N 0127 AND UP) (T188C S/N 03474 AND UP) (206 S/N 05030 AND UP) (207 S/N 05227 AND UP) (T207 S/N 05227 AND UP) (P21 0 SERIES S/N 278 AND UP) (180 S/N 53087 AND UP) (210 S/N 63373 - 63375 AND UP) (B19 SPORT)Capehart Industries, IncSTC SA5193NMInstallation of vortex generators to affect reductions in stall speed and minimum control speed and to increase the take off weight to 7579 pounds and the ramp weight to 7629 poundsMicro AeroDynamics IncSTC SA5656NMInstallation of burglar alarm system.Thompson Harold SSTC SA4745NMInstallation of Lifeport Patient Loading and Support System.LifePort IncSTC SA5926NMInstallation of manifold pressure instrument.Electronics InternationalSTC SA1626NM PAGE 1Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)Electronics InternationalSTC SA1814CEInstallation of Total Flood Corporation fire extinguishing system in the cabin and/or a fire extinguishant system and/or detection system in the engine compartmentsAdvanced Aircraft Extinguishers LtdSTC SA5159NMInstallation of chip detector system.Northwest Aircraft Inc · Lists 421 SeriesSTC SA3492SW-DInstallation of a Century yaw damper system, kit no. YK999 consisting of a Century yaw damper.Century Flight Systems IncSTC SA5689NMInstallation of entertainment system and associated hardware.Sadler JeanieSTC SA3228WEInstallation of Silver Instruments Fueltron IIIG or IIIP digital fuel flow indicating system.Arnav Systems IncSTC SA1570GLInstallation of on-board engine analyzer system.Masten Products IncSTC SA103RMInstallation of exhaust turbo connector, P/N 30477-3Heliarc Welding Service Inc.
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