N521
STCs that may be installed · 401
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 = '1145005'
UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '59997')
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.
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 = '1145005'
UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '59997')
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_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.
Airframe · Airbus Helicopters AS350B3
STC SR11192DSInstallation of a Baggage Compartment Floor ProtectorSTC SR04297NYInstallation of the Alternate Standby AltimeterSTC SR00821DEInstallation of Automatic Dependent Surveillance - Broadcast (ADS-B) Out and in functionality using the BendixKing KT74 Transponder and qualified position sensor and ADS-B In ReceiverSTC SR00828DEInstallation of Automatic Dependent Surveillance Broadcast (ADS-B) Out functionality using the Garmin G330ES or G33H ES Transponder and qualified position sensorSTC SH4748NMInstallation of a replacement instrument panel visor.STC SH4785NMInstallation of replacement dome light/air vent assembly.STC SH4786NMFabrication and Installation of dual control collective and cyclic sticks.STC SH4971NMInstallation of lead acid batterySTC SR00211SEFabrication and Installation of rear seat shoulder harnessesSTC SR00646SEReplacement of the original landing gear skid tubes.STC SR02253SEFabrication of Geneva Aviation P162 Cross-Tube Antenna MountsSTC SR00602NYOperation with the left-hand and/or right-hand aft/side cabin doors removed.STC SR03077NYInstallation of a HELICOM V2 NUM System or HELICOM V2+ NUM System for tracking a set of flight and system parameters during operation of the rotorcraft.STC SR09658RCInstallation of BLR FASTFIN System.STC SR01785LAInstallation of Airfilm Single Pole Utility Bracket.STC SR03938NYInstallation of Max Pilot View Kit consisting of a new RH 'bubble' door with a larger transparent area, a new 'bow' shaped floor
structure which the door conforms to, a floor viewing aperture outboard of the RH pilot's seat and a corresponding transparent
section in the underlying fairing,STC SR01652LAInstallation of External Attach FrameSTC SR00812DEInstallation of Honeywell Sky Connect Tracker III systemSTC SR09508RCInstallation of Garmin GTS 800 Traffic Advisory SystemSTC SR02492AKInstallation of a Crash Resistant Fuel System (CRFS)STC SH2973SW-DInstallation of external markings.STC SR02393CHInstallation of an Inlet Barrier Filter systemSTC SR01449LAInstallation of cargo rack.STC SR01521LAInstallation of a belly utility mount.STC SR03681NYInstallation of Human External Cargo Dual Hook SystemSTC SR02544SEInstallation of a Honeywell ASPIRE 200 SATCOMSTC SR00104RDInstallation of Cargo Pod Assembly for AS350 series helicopterSTC SR09507RCInstallation of optional configuration co-pilot seat relocationSTC SR03919NYInstallation of the Helicopter FilmWorks Mount AssemblieSTC SR02487AKInstallation of L-3 Communications Avionics Systems ESI-500 Standby Instrument SystemSTC SR03889NYInstallation of the Skidtube Wearplate KitSTC SR00103RDInstallation of Bike Racks for AS350 series helicopterSTC SR00617DEInstallation of a Reduced Instrument Panel, Pedestal, Optional Avionics System, and Night Vision Imaging SystemsSTC SH8104SWInstallation of a fold-up attendant seat.STC SR02478AKInstallation of the L-3 Aviation Products Lynx multilink surveillance system model NGT-9000() part number 9029000-20000 or Garmin GTX-345 ADS-B transponder part number 011-03302-40STC SR01954LAInstallation of a Goodrich electrical hoistSTC SR03793NYInstallation of Seat Defender Kit P/N PC350-SD01 for Standard High-Back Crew SeatsSTC SR03771NYInstallation of an Enlarged Vertical Reference WindowSTC SR09125RC-DInstallation of FLIR U7000, U8000, U8500, 380-HD, or 380-HDc series Infrared Imaging SystemSTC SR03748NYInstallation of Boarding StepsSTC SR02475AKInstallation of the Lexavia Integrated Systems LFS3500 Enhanced Vision System (EVS) on Part 27 Airbus Helicopters equipped with a panel-mounted Multi-Function Display (MFD), primary navigational display or dedicated display with the ability to display video imagerySTC SR09312RC-DInstallation of an Avidyne 610 or 615 Traffic Advisory SystemSTC SH7011SW-DInstallation of a Nightsun or Starburst SearchlightSTC SR09311RC-DInstallation of a BMS Video Downlink SystemSTC SR09501RCInstallation of Garmin G500H Electronic Flight Instrument System (EFIS)STC SR00811DECertification of Honeywell MK-XXI Helicopter Terrain Awareness and Warning System (HTAWS)STC SR03693NYInstallation of the provisions for an Engine Air Intake CoverSTC SR02470AKInstallation of the L-3 Communications NGT -1000/2000/2500 ADS-B SystemSTC SR02471AKInstallation of the L-3 Communications NGT -9000/9000R ADS-B SystemSTC SR09504RCInstallation of AHI multi-bloc Center Console