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 SA4095NMReplacement fuselage assembly with optional features.STC SA02152AKFabrication and installation of F. Atlee Dodge 3-inch extended Main Landing Gear, P/N 3284.STC SA11RMInstallation of modified axles, wheels and brakesSTC SA00083DEInstallation of an additional cross tube to the upper cabin structure.STC SA00116DEInstallation of Replacement Vertical Stabilizer.STC SA00142DEInstallation of a replacement horizontal stabilizer.STC SA00150DEInstallation of Replacement Elevator Frame.STC SA00151DEInstallation of replacement Rudder Frame.STC SA02138AKFabrication and installation of a light weight battery and bracket under the rear seat.STC SA00678SEInstallation of J. P. Instruments 8Jimline EGT-100 series primary instrumentsSTC SA1526NMInstallation of Piper landing gear vee assemblies, P/Ns 10033-5, 10033-6 with P/Ns J-10033-( ).STC SA1554NMInstallation of Jensen Aircraft fuel valve plug No. 011-2.STC SA1555NMInstallation of Jensen Aircraft fuel valve No. 011-1.STC SA1568NMInstallation of Cleveland wheels and brakes.STC SA1576NMInstallation of muffler.STC SA1580GLInstall shoulder harness and seat belt assembly.STC SA5925NMInstallation of oil pressure/temperature instrument.STC SA02094AKFabrication and Installation of the F Atlee Dodge Rear Seat Heater.STC SA02093AKInstallation of hourmeter airspeed switch.STC SA02091AKInstallation of Airglas LW2500 fixed wheel penetration skis.STC SA02085AKModification to front seat to allow seat back to fold forward.STC SA17RMReplacement for Piper P/N 10033 Landing Gear VeeSTC SA02068AKFabrication and installation of Airglas Engineering Company, Inc., Model LT32PA-18 belly tank kit and electric auxiliary fuel transfer system.STC SA98CHInstallation of replacement wing ribs.STC SA02066AKFabrication of Aircraft Tiedown Bracket Assembly (P/N 3197).STC SA00393SEInstallation of the G/S 2500 and G/S2500R Aircraft Security Alarm System.STC SA00248DEInstallation of attach fittings for shoulder harness restraint system, front and rear seat.STC SA02058AKFabrication of Replacement Stabilizer Assembly (P/N 3219).STC SA02060AKFabrication of Replacement Elevator Assembly (P/N 3220).STC SA02056AKFabrication of Replacement Rudder Assembly (P/N 3216).STC SA02040AKInstallation of vented fuel cap assembly (P/N 3267)STC SA2040AKInstallation of vented fuel cap assembly (P/N 3267).STC SA00215NYInstallation of CAVU Model AM100 AVMIX engine fuel/air mixture setting system.STC SA683SWConvert from monoplane to biplane configuration by adding all metal lower wings.STC SA02023AKFabrication of F. Atlee Dodge Part No. 3241 Muffler AssemblySTC SA02025AKFabrication of F. Atlee Dodge part no. 3182 preheater shroud assembly.STC SA02026AKFabrication and installation of wing front spart lift strut fitting reinforcing bracketsSTC SA5656NMInstallation of burglar alarm system.STC SA02011AKFabrication and installation of top deck assembly x-brace.STC SA5948NMInstallation of vortex generators on wing leading edge.STC SA5926NMInstallation of manifold pressure instrument.STC SA00261ATInstallation of basic type BYE-14, Model No. 1008 air driven alternator. (PA-18 Series except PA-18-150 and PA-18A-150)STC SA1626NM PAGE 2Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series)STC SA5159NMInstallation of chip detector system.STC SA1961CEOperation of airplane on unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON + MON)/2. Intermixing with aviation gasoline also approved.STC SA4635NMModification of wing lift struts.STC SA753CEInstallation of skis Model Nos. M1500, M1800, M2000, M3000H.STC SA2350NM PAGE 1Installation of Electronics International Inc digital carburetor/outside air temperature gaugesSTC SA2607CEOperation of airplane on leaded or unleaded automotive gasoline, 91 minimum antiknock index(RON+MON)/2 per ASTM Specification D-439. Inter-mixing with aviation gasoline also approved.STC SA317NEInstallation of Auto-Vac-2 manifold vacuum system.