N20821
STCs that may be installed · 400
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 = '7101820'
UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '41506')
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 = '7101820'
UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '41506')
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 · Piper PA-18-135
STC SA4618NMFabrication and installation of P/N 3166-1 main landing gear cabane vee assembly.STC SA4621NMFabrication and installation of P/N 3164-1 main landing gear shock strut assemblies.STC SA4051NMInstallation of replacement aft fuselage tail section with Univair repair section U-12183-TS.STC SA4606NMInstallation of main landing gear safety cable kit.STC SA1337GLInstall Aero Ski Manufacturing Co., Inc., Model R2800 Retractable Skis.STC SA3862NM PAGE 1Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories.STC SA3626NMApplication of polyurethane finishing system.STC SA2303NMInstallation of header tanksSTC SA2338NMInstallation of SWS-11000 Tundra tires, wheels, and hubs.STC SA2733NMInstallation of wing assembly.STC SA1455NMInstallation of a flame proof auxiliary heater-dryer, Model12-1600.STC SA4-302Installation of BN-1 propeller spinner.STC SA2307NMInstallation of hydraulic ski- brake assembly.STC SA2190NM PAGE 1Installation of electronics International Digital Volt/Amp Gauges and Accessories.STC SA1351WEReplace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12)STC SA1678NMInstallation of replacement wing ribs.STC SA715ALInstallation of Schneider Model SWS-4000 main wheel skis and Schneider Model SWS-1000 tail wheel skis.STC SA2127WEInstallation of Madras Air Service Model 104 wing tips.STC SA334SWInstallation of InterAv Alternator.STC SA4RMInstallation of modified landing gear, Cleveland P/N 40-84 wheels and P/N 30-41 brakes.STC SA293ALInstallation of Stoddard improved brake system.STC SA99ALInstallation of six-inch wheels and brakes.STC SA1646CEReplacement of bushing type pulley pulley in aileron control system.STC SA703ALInstallation of skis.STC SA641ALFabricate front wing spar butt attachment repair fitting.STC SA638ALFabricate rudder mounted strobe light support bracket.STC SA624ALInstall fiberglass wing tip assembly.STC SA589WEFull flow oil filter F-94056 and F-94056-12 with element E-3560 MEL 800.STC SA490ALInstallation of leading edge cuff.STC SA1033EAReplace steel oil cooler lines with Aeroquip type 303-8 hose using AN-823-8D elbows, AN-816-8D nipples and AN-321-8 hose fittings.STC SA540ALInstallation of modified landing gear with main gear legs lengthened 6 inches.STC SA69NWInstallation of Matney's engine charge air-air filter assembly. (AA-1B, AA-1, AA-1A 1969 AND ON) (AA-5 1972, 1973 AND 1974 ONLY)STC SA630WEInstallation of oil filter assemblies. (NAVION A AND B with optional engine)STC SA526ALBuild up 1-1/4-inch axle to 1-1/2-inch axle to install Celveland wheel and brake.STC SA105NWMounting and wiring for occasional installation and use of Barnes Engineering Company airborne fire spotter system.STC SA489ALInstallation of modified dog leg brace baggage compartment.STC SA292ALIncreased gross weights to PA-18-150 weights and C.G. envelope. Note: Airplanes must have Lycoming O-320 engine installed except, the PA-18-135 or PA-18A-135 for which the engine change is optional.STC SA2468WEUse of GCA-600 axle adapter assembly for installation of Cleveland Model 40-84A wheels and Model 30-41 brakes.STC SA894WEInstallation of Lycoming O-320-A2B engine and Sensenich M74DM-56 propeller.STC SA279ALInstallation of McCauley 1A175/GM propeller on -135 models listed and installation of McCauley 1A175/GM8241 through GM 8244 on the -150 models listed.STC SA4ALInstallation of auxiliary wing fuel tanks.STC SA324CEManufacture hitch and bracket. Install tow hitch.STC SA425ALInstallation of removable seat back support.STC SA400ALConversion of 4-inch wheels and brakes to 6-inch wheels and brakes.STC SA2105WEInstallation of Model EGT-3 exhaust gas temperature monitor(with rising temperature alarm). (DC-6B (NAVY R6D-1Z) 680)STC SA5-7Install framing and seat in baggage compartment.STC SA136ALInstallation of Lycoming O-320 engine.STC SA4-254Hartzell HC82XG-6/7636D-4 propeller Lycoming 70385 dual drive assembly, Woodward 210115 single acting governor and J-6230-1 lord mount assembly.STC SA1177WEWECO carburetor temperature monitor.STC SA141ALRemoval of agricultural hatch.