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 SR00916NYInstallation of LH and RH rear cross tube mounted maintenance steps.STC SR03572NYInstallation of a Standard Interior ModificationSTC SR03448NYInstallation of a TDFM-9000 Multiband TransceiverSTC SR03538NYInstallation of the PA100 PUREair SystemSTC SR00213NYInstallation of Heli-Utility Basket and Long Cargo TubeSTC SR00009RDInstallation of a Sand FilterSTC SR03554NYInstallation of Aspen EFD1000H/PFD500H Electronic Flight DisplaysSTC SR00028NYThe installation of BearpawsSTC SR03539NYInstallation of Garmin G500H Flight Display System.STC SR03534NYInstallation of a 28VDC Utility SystemSTC SR03524NYInstallation of a MD302 Standby Attitude ModuleSTC SR03387NYInstallation of AVEO Engineering LED anticollision light, LED position/strobe lights and LED tail position lightsSTC SR02394AKReplacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting systemSTC SR01390SEInstallation of a Supplemental Lighting System.STC SR00771DEInstallation of a cargo pod on the left side of the landing gearSTC SR09647RCInstallation of Bubble Windows in left hand or right hand side crew doorsSTC SR00115DEInstallation of a Video Camera System.STC SR00811SEInstallation of an engine air filter.STC SR01049SEInstallation of an engine air filterSTC SH4776NMInstallation of replacement transmission cowling panels.STC SR02180LAInstallation of a Cable Cutter KitSTC SR02288LAInstallation of Nose Window Utility Mount.STC SR09582RCInstallation of Lead Acid Battery MaintainerSTC SR09588RCInstallation of Aspen Avionics 1000H Primary Flight Display and Multi Function DisplaySTC SR09459RCInstallation of Night Vision Goggle (NVG) Compatible Interior Lighting SystemSTC SR09575RCInstallation of Garmin G500H Flight Display SystemSTC SR02493LAInstallation of Teledyne Battery Products Model 7641-20STC SR03383NYInstallation of a Latitude Technologies IONODE Flight Data Monitoring (FDM)STC SR03380NYReplacement of existing OEM supplied Cargo Hook with the Installation of Indra ro Siren IS10-100 Cargo Hook per MDL No.ADC17, Issue 2STC SR00654NYInstallation of rear cargo hinge and latch.STC SR00338BOInstallation of a Flight Data System KIT 130ND-3130100STC SR01866CHInstall Electrically Actuated Retractable Microwave Antenna on Landing Gear Skid.STC SR00422NYRelocation of a higher capacity battery to the tail boomSTC SR00927NYInstallation of a Fargo Airborne Surveys Electro-Magnetometer Boom and Geosurvey EquipmentSTC SR03352NYInstallation of Skynode S200 SATPHONE/TRACKERSTC SR09558RCInstallation of Night Vision Goggle (NVG) Compatible Lighting SystemSTC SR03345NYInstallation of Fugro AGG Survey Installation (Structural Provisions)STC SH1262NWFabrication of either Onboard Systems Hydraulic Model H-69 (Part Number 200-018-00) or Electronic Models E-69 (Part Numbers 200-058-00 and 200-295-00) Cargo Hook Load Weigh SystemsSTC SR00676NYInstallation of forward opening rear cargo door.STC SR00430NYInstallation of a forward two-place passenger seating configuration.STC SR01632NYInstallation of Airframe Mounted Fuel FilterSTC SH2676SOInstallation of a lubrication oil scavenge filter.STC SH1476SOManufacture of a Controllable Belly Mounted Searchlight (Nightscanner)STC SR03279NYInstallation of a Cable CutterSTC SR03272NYInstallation of a Technisonic Industries Limited TDFM-136B TransceiverSTC SR09633RCInstallation of Balloon Pump Restraint System (BPRS)STC SH5119NMInstallation of a modified rear bench seat.STC SH5120NMInstallation of a two-piece high/ low-back forward seat.STC SR00191SEInstallation of a single place pilot/ copilot seat.STC SR00039ATManufacture of passenger bulged window.