Cessna 421
STCs that may be installed · 248
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 ('2076010')
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 ('2076010')
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 SA1755SOInstallation of Allied/Bendix microwave landing system, MLS-20A.STC SA2063SOInstallation of stretcher system.STC SA660WEInstallation of HRD-type fire extinguishing system. (AND STC SA111WE)STC SA3283NMInstallation of ARNAV Systems FC-10/FT 10 digital fuel flow indicating system.STC SA2721NMInstallation of a turbocharger bypass exhaust elbow.STC SA169RMInstallation of exhaust stacks.STC SA968SWMitchell automatic flight system AK279 consisting of Century III autopilot with optional automatic pitch trim, radio couplers, automatic aileron stabilizer.STC SA1418SOReplacement of rotor vanes in Airborne 211CC and 212CW vacuum pumps. (See limitations)STC SA2190NM PAGE 1Installation of electronics International Digital Volt/Amp Gauges and Accessories.STC SA607GLInstallation of a Shadin Company 910502, 910504, or 910514 fuel flow indicating system.STC SA5426SWInstallation of Texas Instruments Model TI 9100 Loran C navigator.STC SA1867CEDC powered windshield installation. (421C EXCEPT 421C0801 THRU 421C1400)STC SA1515NMCrossover exhaust pipe assembly.STC SA2656SWAddition of Hydro Seal Fluid Additive to nose and main gear shock struts.STC SA1210CEInstallation of Hanlon & Wilson exhaust systems, P/N 8108-59 and P/N 8109-59 or P/N8108-159 and 8109-159.STC SA2386SWInstallation of S.A.F.E., EGT, CHT Systems.STC SA1393CEInstall forward baggage door warning system.STC SA108RMModify exhaust stacks by replacing existing bellows or seal type joints with a clampless, sealess type slip joint.STC SA1375CEReduce height of existing survival seat.STC SA1343CEInstall Sierra data console on left hand seat rails.STC SA102RMInstallation of exhaust turbo connector, P/N 042177-5.STC SA465SOInstallation of Bendix FCS-810 automatic flight control system including flight director indicator DH-841( ) and manual electric trim.STC SA591EAInstallation of Radome Part Part No. 3084X.STC SA107GLConversion of oil lubricated de-ice pumps and related hardware to Airborne dry air pump 400 series conversion kits.STC SA1675WEInstallation of exhaust gas temperature monitoring systems EGT-2.STC SA1642WEModification of exhaust system components.STC SA3RMModification of engine exhaust stacks by replacement of expansion joint with slip fit joint.STC SA632SOInstallation of Bendix Model M-4C automatic flight control system, including manual electric trim.STC SA798EAInstallation of Monitair exhaust gas combustion monitor kit.STC SA794CEInstall vapor cycle air conditioning system.STC SA240WEConsolidation of STCs SA355CE and SA362CE into one STC having MASTER ELIGIBILITY LIST - amended to include improved power supply assembly and subchassis timer assembly for Twilighter MK III high intensity supplementary lighting system.STC SA536CEInstall electrical connectors in pressure bulkhead(s) at Station(s) 100 and/or 273.94.STC SA661EAInstallation of Radome Kit No. 3084K for Bendix RDR-100 or RDR-110 series radar systems 12-inch antenna.STC SA2105WEInstallation of Model EGT-3 exhaust gas temperature monitor(with rising temperature alarm). (DC-6B (NAVY R6D-1Z) 680)STC SA1200CEInstallation of FiQuench cabin and/or engine fire extinguishant system.STC SA3017WEInstallation of fuel flow instruments.STC SA662CEInstallation of Jet Electronics & Technology, Inc. Model FC120A autopilot.STC SA673CEInstall Hartzell HC-B3WF-2/9349-3 propellers.STC SA978SWCollins FD108 flight director system.STC SA00765DE PAGE 1Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensorSTC SA02153LA-DInstallation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) SystemSTC ST01085LAInstallation of the VNS 1000 Voice Navigation System.STC SA00281BO PAGE 1Installation 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 700-00165-000STC SA02153LAInstallation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System.STC SA01933LAInstallation of Garmin Model 400W / 500W Series GPS-WAAS Navigation SystemSTC SA5796SWInstallation of Alcor Tru-Flow indicating system, or SDI Hoskins fuel flow indicating system, or Silver Instruments Fueltron fuel flow indicating system.STC SA01229SEInstallation of CNX80 GPS WAAS Navigator with integrated VHF Navigation and Communication radios.STC SA2350NMInstallation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories.
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