N421RM

STCs that may be installed · 253

Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do. In force first, then newest.

Query with SQL
duckdb -csv -c "SELECT m.matched_by, s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
  FROM (
    SELECT stc_number, min(side) AS side, arg_min(matched_by, side) AS matched_by, arg_min(matched_model, side) AS matched_model
    FROM (SELECT stc_number, 1 AS side, 'airframe' AS matched_by, matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code = '2076012'
      UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '17035')
    GROUP BY stc_number
  ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
  ORDER BY m.side, 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.

Airframe · Cessna 421A

STC SA108RMModify exhaust stacks by replacing existing bellows or seal type joints with a clampless, sealess type slip joint.Heliarc Welding Service Inc.STC SA1375CEReduce height of existing survival seat.Sierra Research CorpSTC SA1343CEInstall Sierra data console on left hand seat rails.Sierra Research CorpSTC SA102RMInstallation of exhaust turbo connector, P/N 042177-5.Heliarc Welding Service Inc.STC SA465SOInstallation of Bendix FCS-810 automatic flight control system including flight director indicator DH-841( ) and manual electric trim.Bendix Corporation Avionics DivSTC SA591EAInstallation of Radome Part Part No. 3084X.Norton Company, Performance Plactics · Lists 421 SeriesSTC SA107GLConversion of oil lubricated de-ice pumps and related hardware to Airborne dry air pump 400 series conversion kits.Airborne Manufacturing CoSTC SA732EAInstallation of radome Part No. 4004X.Norton Company, Performance PlacticsSTC SA1675WEInstallation of exhaust gas temperature monitoring systems EGT-2.K S Avionics, Inc · Lists 421 SeriesSTC SA1642WEModification of exhaust system components.Wooley Tool & Mfg DivSTC SA3RMModification of engine exhaust stacks by replacement of expansion joint with slip fit joint.Heliarc Welding Svc IncSTC SA632SOInstallation of Bendix Model M-4C automatic flight control system, including manual electric trim.Bendix Corporation Avionics DivSTC SA798EAInstallation of Monitair exhaust gas combustion monitor kit.Rosemount Engineering CoSTC SA794CEInstall vapor cycle air conditioning system.Janitrol Aero DivisionSTC 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.Symbolic Displays, IncSTC SA661EAInstallation of Radome Kit No. 3084K for Bendix RDR-100 or RDR-110 series radar systems 12-inch antenna.Norton Company · Lists 421 SeriesSTC SA780EAInstallation of Radome Kit No. 4004K-B for Bendix RDR-100 or RDR-110 series radar systems - 12-inch antenna.Norton CompanySTC SA2105WEInstallation of Model EGT-3 exhaust gas temperature monitor(with rising temperature alarm). (DC-6B (NAVY R6D-1Z) 680)K S Avionics, IncSTC SA1200CEInstallation of FiQuench cabin and/or engine fire extinguishant system.Enk Aviation CorporationSTC SA3017WEInstallation of fuel flow instruments.Silver Instruments IncSTC SA662CEInstallation of Jet Electronics & Technology, Inc. Model FC120A autopilot.Jet Electronics & Technology · Lists 421 SeriesSTC SA673CEInstall Hartzell HC-B3WF-2/9349-3 propellers.Hartzell Propeller Inc · Lists 421 SeriesSTC SA978SWCollins FD108 flight director system.Aircraftsmen Inc · Lists 421 SeriesSTC SA00765DE PAGE 1Installation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the BendixKing KT74 Transponder and qualified position sensorPeregrineSTC SA02153LA-DInstallation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) SystemGarmin International IncSTC ST01085LAInstallation of the VNS 1000 Voice Navigation System.VNS IncorporatedSTC 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 700-00165-000Avidyne CorporationSTC SA02153LAInstallation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System.Garmin AT Inc.STC SA01933LAInstallation of Garmin Model 400W / 500W Series GPS-WAAS Navigation SystemGarmin AT Inc.STC SA5796SWInstallation of Alcor Tru-Flow indicating system, or SDI Hoskins fuel flow indicating system, or Silver Instruments Fueltron fuel flow indicating system.RAM Aircraft Limited PartnershipSTC SA01229SEInstallation of CNX80 GPS WAAS Navigator with integrated VHF Navigation and Communication radios.UPS Aviation TechnologiesSTC SA2350NMInstallation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories.Electronics International

Engine · Continental GTSIO-520-C

STC SE04349CHInstallation of SureFly electronic ignitionSureFly Partners Ltd.STC SE02352CHInstallation of Challenger cleanable oil filter assemblyChallenger Aviation Products Inc.STC SE03309CHInstallation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt applicationHartzell Propeller Inc.STC SE01966WIUse of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft enginesGeneral Aviation Modifications Inc.STC SE2340SWInstallation of modified cylinder assemblies, barrels, piston, and repaired crankcases.Continental Motors, Inc.STC SE34WEInstallation of Electro-Coatings, Inc., piston rings on Continental pistons.Continental Motors, Inc.STC SE5820SWInstallation of Airmotive exhaust valve, P/N AEC-637781.Continental Motors, Inc. · Lists GTSIO-520 SeriesSTC SE8776SWInstallation of coated cylinders and piston rings.Continental Motors, Inc. · Lists GTSIO-520 SeriesSTC SE3330NMContinental valve cover gasketReal Gaskets TennesseeSTC SE612GLInstallation of a Shadin Company fuel flow transducer.Shadin AvionicsSTC SE1780NMInstallation of Precise Flight standby vacuum system (SVS III).Precise Flight IncSTC SE5743NMIntallation of adapter for externally mounted oil filter.Aviation Development CorporationSTC SE8338SWInstall locknuts on cylinder attachment studs and thru-bolts, and install 6 additional cylinder attachment studs onto engine crankcases.RAM Aircraft Limited Partnership · Lists GTSIO-520 SeriesSTC SE09513SCInstallation and usage of Exxon 20W50 Multigrade aircraft engine oil conforming to Exxon Oil Formulation WS-3013.Exxon Company USA · Lists GTSIO-520 SeriesSTC SE00350SEInstallation of sump mounted chip detector.Aviation Development CorporationSTC SE1004SWInstallation of alternator braces.Signature Flight Support CorporationSTC SE452NEInstallation and usage of 'Mobil AV 1' aviation oil.Mobil Research & Development Corp · Lists GTSIO-520 SeriesSTC SE5879SWUse of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.Phillips Petroleum Co · Lists GTSIO-520 Series
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