N504HA

STCs that may be installed · 96

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 = '4360122'
      UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '41534')
    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 · Hiller UH-12E

STC SR04637CHReplacement of existing main ship battery with Lithium Ion Battery and installation of Annunciator Control PanelAirwolf Aerospace LLCSTC SH3319NMInstallation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,Precise Flight IncSTC SH1152NWInstallation of the Automatic Flagman Model 135 Control Stick GripAir Products & Parts LLCSTC SR02704SEInstallation and maintenance of the Sunspot 36 and 46 series lightsAeroLED's Holdings LLCSTC SR00359BOInstallation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights.Whelen Aerospace TechnologiesSTC SR01845SEInstallation of a barrier air filtration systemCascade Flying Service LLCSTC SR00420NYInstallation of Airwolf remote mounted engine oil filter Model AFC-600Airwolf Filter, CorpSTC SR01802WITo allow the use of UL91 or UL94 (minimum) grade aviation fuel per ASTM D7547.Swift Fuels LLCSTC SR02394AKReplacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting systemSeaplanes North LLCSTC SA00068SEInstallation of fuel flow/pressure instruments. (W/TSIO-360-MB1)Electronics International Inc.STC SA2693NMInstallation of Electronics International digital volt/amp gauges and accessories.Electronics International Inc.STC SH381NWInstallation and maintenance of engine auto reignition system. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH476NWInstallation of an agricultural spray system.Siam Hiller Holdings IncSTC SA02033ATModification to install an air-oil separator to prevent oil from being aspirated from the engine breather line.M-20 Oil Separators LLCSTC SH178WEInstallation of Allison 250-C20/250-C20B engine and related changes. (UH-12E-L (4 place))Siam Hiller Holdings IncSTC SH248NWInstallation and maintenance of exhaust ejector engine oil cooler system. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH288NWInstallation of Hiller landing gear float kit No. 44012. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH296NWInstallation of Hiller auxiliary fuel tanks kit No. 72041. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH298NWInstallation and maintenance of a cabin heater system. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH300NWInstallation of Soloy cargo racks.Siam Hiller Holdings IncSTC SH322NWInstallation of a Bendix fuel control/power governor system on the Allison 250-C20 turbine powered Hiller UH-12E rotorcraft. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH339NWInstallation of transmission oil cooling system on the Allison250-C20 turbine powered Hiller UH-12E rotorcraft. (UH-12E modified per STC SH178WE)Siam Hiller Holdings IncSTC SH506NWInstallation of cargo release pedal.Siam Hiller Holdings IncSTC SH560NWInstallation and maintenance of engine inlet air cleaner system.Siam Hiller Holdings IncSTC SH634NWInstallation of Tundra Pads.Siam Hiller Holdings IncSTC SA01258SEInstallation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML.R-S Sales Inc.STC SA02520ATInstallation of M-20 Oil Separator, model 600-WP.M-20 Oil Separators LLCSTC SH849NWInstallation of North American Industries, Inc., Model No. 5 Automatic FlagmanR-S Sales Inc.STC SH201WEInstallation of stirrup assemblies to directional control pedals for operation by handicapped pilot. (US ARMY OH-13E 205A)Dallwig Barry CSTC SA2687NMInstallation of Truboplus/ Electronics Int'l gauges and switches.Aero Manufacturing Inc.STC SH12CEReplace existing engine induction air filter with AC Spark Plug Filter.Brackett Aero Filters Inc.STC SH767NWInstallation of Chadwick Model C-512S spray system.Tower Aerospace, IncSTC SR00135LAInstallation of Yehnert Tail Rotor Blades YH-278 as replacements for Hiller Tail Rotor Blades 55073.Yehnert Helicopters, IncSTC SA1626NM PAGE 1Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)Electronics InternationalSTC SH5729NMFull flow oil filter systemGrogan DonSTC SA2350NM PAGE 1Installation of Electronics International Inc digital carburetor/outside air temperature gaugesElectronics InternationalSTC SH300GLInstallation of Facet Enterprises engine lubrication system scavenge filter.Facet Filter ProductsSTC SH2763SOInstallation of control rotor safety cable.JAARS Inc.STC SA4302NMInstallation of Electronics Int'l digital automatic engine analyzer.Electronics InternationalSTC SH2611SOInstallation of cargo rack.JAARS Inc.STC SA3862NM PAGE 1Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories.Electronics InternationalSTC SH4173NMInstallation of Simplex Model 7600 modular electrical system. (US ARMY OH-13E M74A)Simplex Manufacturing CompanySTC SH3362NMInstallation of a Tail Rotor Blade Protective CoatingColumbia Helicopters IncSTC SA2190NM PAGE 1Installation of electronics International Digital Volt/Amp Gauges and Accessories.Electronics InternationalSTC SH4997SWInstallation of Lycoming TIVO-540-A2A engineCraig HelicoptersSTC SH302NMInstallation of two Albany Int. dispersion pads, Drawing No. 21940 or 21961.Albany InternationalSTC SH1014NWSimplex Model 4600 spray systemSimplex Manufacturing CoSTC SH1147NWInstallation of a Chadwick Spray SystemHelicopter Maintenance Corp.STC SH887NWSimplex Model 4650 spray system - agricultural.Simplex Manufacturing CoSTC SH948NWInstallation of Model No. 5 automatic flagman. (UH-12E Restricted)North American Industries
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