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.
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_numberRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
STC SA00823CHInstallation of various de-icer wire harnesses.STC SA02520ATInstallation of M-20 Oil Separator, model 600-WP.STC SA00709LAInstallation of control wheel. Includes provisions only for a push-to-talk (PTT) switch. Separate FAA approval of PTT switch is required.STC SA1401GLInstall air ambulance conversion.STC SA802NEInstallation of Cessna SK310-114-0 electric windshield heated panel installation kit.STC SA09544SCInstallation of a wastegate in-line oil strainerSTC SA4592SWInstallation of improved engine cooling baffle and improved exhaust system slip joints.STC SA4851SWInstallation of combination aft position/strobe light on aircraft tail stinger.STC 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 wingletsSTC SA5878SWInstallation of range-marked EGT, CHT, oil temperature, and pressure gauges.STC 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.STC SA7594SWInstallation of Cablecraft throttle, mixture, and propeller control cables.STC SA08996AC-DInstallation of S-TEC System 55/55X Two Axis automatic flight guidance system, Model ST-578STC SA2687NMInstallation of Truboplus/ Electronics Int'l gauges and switches.STC SA01117ATInstallation of Composite Spinner.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)STC SA00804SEInstallation of an engine failure indicator system, also referred to as a 'low Thrust Detector system.'STC SA3003WEInstallation of recognition light assembly on horizontal stabilizerSTC SA00833WIInstallation of a seat headrest.STC SA00381DEModification of the Cessna 421C for installation of a Space Imaging System.STC SA09517SCInstallation of a children's critical care childs stretcher assembly, p/n 100-1.STC SA1007NWInstallation of a low thrust detector system.STC SA2780SWInstallation of Hoskins Model CFS-2000, -20001, or FT-2000 fuel flow indicating system.STC SA00749ATModification of flush type fuel caps for installation of a locking cylinder and keeper. (1964 and subsequent)STC SA5925NMInstallation of oil pressure/temperature instrument.STC SA5924NMInstallation of RPM instrument.STC SA00015SEInstallation of a vortex generator system on wing and vertical tail.STC SA7790SW-DInstallation of S-TEC system 60 two axis automatic flight guidance system, model ST-398.STC SA7787SW-DInstallation of S-TEC System 65 two axis automatic flight guidance system, model ST-397.STC SA00228NYInstallation of Sky Harbour Aircraft Refinishing Ltd Ice Damage Prevention Plates.STC SA807EAInstallation of radome.STC 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.STC SA3415SW-DInstallation of Century automatic flight system kit No. AK918/FD consisting of Century 41 autopilot/flight director.STC SA00404WIInstallation of a starter engagement indication system.STC SA00061LAInstallation of JPI digital tachometer.STC SA7788SW-DInstallation of S-TEC yaw damper system, model ST-401.STC SA3463SW-DInstallation of Century automatic flight system, Model AK968 consisting of a Century 2110/2130/2131 autopilot.STC 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)STC 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 poundsSTC SA5656NMInstallation of burglar alarm system.STC SA4745NMInstallation of Lifeport Patient Loading and Support System.STC SA5926NMInstallation of manifold pressure instrument.STC SA1626NM PAGE 1Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)STC SA1814CEInstallation of Total Flood Corporation fire extinguishing system in the cabin and/or a fire extinguishant system and/or detection system in the engine compartmentsSTC SA5159NMInstallation of chip detector system.STC SA3492SW-DInstallation of a Century yaw damper system, kit no. YK999 consisting of a Century yaw damper.STC SA5689NMInstallation of entertainment system and associated hardware.STC SA3228WEInstallation of Silver Instruments Fueltron IIIG or IIIP digital fuel flow indicating system.STC SA1570GLInstallation of on-board engine analyzer system.STC SA103RMInstallation of exhaust turbo connector, P/N 30477-3
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