# STCs that may be installed: Piper PA-18-135 (L-21B) A list on [Piper PA-18-135 (L-21B)](https://openairdocs.org/model/piper-pa-18-135-l-21b.md). In force first, then newest. The registry doesn’t record which STCs an aircraft has. Page 1 of 8 · 367 STCs - [STC SA02386AK](https://openairdocs.org/stc/SA02386AK.md): Replacement of existing landing and/or taxi light reflector and bulbs with Light Emitting Diode (LED) lighting systems · AeroLED's Holding LLC - [STC SA00343BO](https://openairdocs.org/stc/SA00343BO.md): Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release) · Avidyne Corporation - [STC SA00352BO PAGE 2](https://openairdocs.org/stc/SA00352BO%20PAGE%202.md): Installation of an Avidyne Corporation Mode A/C/S Transponder with ADS-B Out capability, Model AXP340 loaded with Version 3.13 software (or later FAA approved version), · Avidyne Corporation - [STC SA01233SE](https://openairdocs.org/stc/SA01233SE.md): Fabrication and installation of Alaskan Bushwheel LLC tail wheel and fork assembly · ABI, LLC - [STC SA02571SE](https://openairdocs.org/stc/SA02571SE.md): Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display). · Garmin International Inc. - [STC SA01861SE](https://openairdocs.org/stc/SA01861SE.md): Fabrication and installation of Landing Light Controller · TCW Technologies, LLC - [STC SA04837NY](https://openairdocs.org/stc/SA04837NY.md): Installation of AeroLED's Holdings, LLC., position lights, navigation lights, strobe lights and beacon lights · AeroLED's Holdings, LLC - [STC SA12406WI](https://openairdocs.org/stc/SA12406WI.md): Installation of a Garmin AXIS Flight Display System · Garmin International Inc. - [STC SA04652CH](https://openairdocs.org/stc/SA04652CH.md): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification · Swift Fuels LLC - [STC SA02636SE](https://openairdocs.org/stc/SA02636SE.md): Installation of Garmin GPS 175 Navigation System and GNX 375 Navigation System with ADS-B In/Out Transponder. · Garmin International Inc. - [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D.md): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System · Garmin International Inc. - [STC SA01147WI](https://openairdocs.org/stc/SA01147WI.md): Installation of Concorde FLA or VRSLA series batteries in Piper Light Airplanes. · Concorde Battery Corporation - [STC SA02511SE](https://openairdocs.org/stc/SA02511SE.md): Installation of replacement fuel quantity indicator sending unit(s) · CiES Inc. - [STC SA02525LA](https://openairdocs.org/stc/SA02525LA.md): Installation of Wheel and Brake Assemblies · Game Aerospace LLC - [STC SA01704LA](https://openairdocs.org/stc/SA01704LA.md): Installation of the Grove Disk Brake System · Grove Aircraft Landing Gear Systems Inc. - [STC SA02211AK](https://openairdocs.org/stc/SA02211AK.md): Installation of components to change thrust line orientation · Steve Pierce - [STC SA00081NY](https://openairdocs.org/stc/SA00081NY.md): Installation of Iceman Aviation Supplies, Inc. Carburetor Ice Detector. · Alcor LLC - [STC SA02200AK](https://openairdocs.org/stc/SA02200AK.md): Fabrication of replacement engine exhaust system assembly (P/N PA18ESA). · Power Flow Systems Inc. - [STC SA02738CH](https://openairdocs.org/stc/SA02738CH.md): Installation of L-3 Communications Avionics Systems · Acron Aviation Inc. - [STC SA04046CH PAGE 2](https://openairdocs.org/stc/SA04046CH%20PAGE%202.md): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500) · Acron Aviation Inc. - [STC SA388EA](https://openairdocs.org/stc/SA388EA.md): Installation of engine and propeller · Steve Pierce - [STC SA7965SW](https://openairdocs.org/stc/SA7965SW.md): Application of fabric and polyurethane finishing system. · Shady Aviation LLC - [STC SA11854CH](https://openairdocs.org/stc/SA11854CH.md): Installation of modified exhaust system in lieu of original components · Dakota Cub Aircraft Inc. - [STC SA04378CH](https://openairdocs.org/stc/SA04378CH.md): Installation of an engine modified per STC SE04349CH · SureFly Partners Ltd. - [STC SA11841BO](https://openairdocs.org/stc/SA11841BO.md): Installation of T3 Tailwheel Suspension System suspension · T3 Tailwheel Suspension System - [STC SA02764SE](https://openairdocs.org/stc/SA02764SE.md): Installation of Acme Aero Shock landing gear shock absorbers · Acme Suspensions LLC - [STC SA02765SE](https://openairdocs.org/stc/SA02765SE.md): Installation of Acme Stinger tailwheel landing gear shock absorber · Acme Suspensions LLC - [STC SA02594SE](https://openairdocs.org/stc/SA02594SE.md): SkyView HDX Instrumentation and Autopilot System manufactured · Dynon Avionics - [STC SA03898NY](https://openairdocs.org/stc/SA03898NY.md): Installation and maintenance of ORATEX covering and coating material · Aircraft Design & Certification Ltd - [STC SA04568CH](https://openairdocs.org/stc/SA04568CH.md): Installation of the uAvionix tailBeaconX, a tail mounted position light with integrated Automatic Dependent Surveillance - Broadcast (ADS-B) Out and 1090MHz Mode-S transponder functionality · uAvionix Corporation - [STC SA02580AK](https://openairdocs.org/stc/SA02580AK.md): Installation of Airframes Alaska Replacement Suspension · Airframes Alaska LLC - [STC SA02191AK](https://openairdocs.org/stc/SA02191AK.md): Fabrication and installation of Dakota Cub extended wings and associated flaps and ailerons. · Dakota Cub Aircraft Inc. - [STC SA02582AK](https://openairdocs.org/stc/SA02582AK.md): Installation of Airframes Alaska Brake Pedal and Master Cylinder Assembly · Airframes Alaska LLC - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE.md): Installation of Garmin GI 275 Multi-Function Display System · Garmin International Inc. - [STC SA02579AK](https://openairdocs.org/stc/SA02579AK.md): Installation of Swing bar · Willow Mountain Ranch - [STC SA02532AT](https://openairdocs.org/stc/SA02532AT.md): Installation of subject Michelin tires on appropriate aircraft. For Michelin 5, 6, 8, and 10-inch rim diameter tires on General Aviation Aircraft. · Michelin North America Inc. - [STC SA00715AT](https://openairdocs.org/stc/SA00715AT.md): Installation of Aqua Floats Model 2200 · Outpost X Aviation Inc. - [STC SA1191SO](https://openairdocs.org/stc/SA1191SO.md): Installation of Aqua Model1500 floats. · Outpost X Aviation Inc. - [STC SA518CE](https://openairdocs.org/stc/SA518CE.md): Install Aqua Model 1900 floats. · Outpost X Aviation Inc. - [STC SA01899WI](https://openairdocs.org/stc/SA01899WI.md): Installation of Garmin G3X Touch Electronic Flight Instrument System · Garmin International Inc. - [STC SA04563AT](https://openairdocs.org/stc/SA04563AT.md): Installation of Sensenich propeller model 2G0M6 C82BGF or 2G0M7 C82BGF · Sensenich Propeller Company - [STC SP04490AT](https://openairdocs.org/stc/SP04490AT.md): Installation of Sensenich propeller model 2G0M8/C82BGF · Sensenich Propeller Company - [STC SA02576AK](https://openairdocs.org/stc/SA02576AK.md): Installation of Cleveland and ABI, LLC Wheel and Brake Kits · ABI LLC - [STC SA02233AK](https://openairdocs.org/stc/SA02233AK.md): Installation of high visibility fuel sight gauge. · Dakota Cub Aircraft Inc. - [STC SA00417BO](https://openairdocs.org/stc/SA00417BO.md): Installation of T3 Tailwheel Suspension Systems Suspension · T3 Tailwheel Suspension Systems - [STC SA02175AK](https://openairdocs.org/stc/SA02175AK.md): Fabrication of Airframes Alaska LLC Heavy Duty Standard Length or 3-inch Extended Main Landing Gear · Airframes Alaska LLC - [STC SA01606CH](https://openairdocs.org/stc/SA01606CH.md): Installation of alternate electro-hydraulic power pack system for operation of main wheel skis. · F.Atlee Dodge Aircraft Services - [STC SA3-180](https://openairdocs.org/stc/SA3-180.md): Installation of Wipaire Skis, Inc. (Aircraft Skis) (FluiDyne) (Federal) Main Skis, Model C2200, Tail Ski, Model CTF2200 or CT3000, and Parts Kit No. W-PMA-001, issued February 26, 2001 · F.Atlee Dodge Aircraft Services - [STC SA3-328](https://openairdocs.org/stc/SA3-328.md): Installation of Model C-2200 main skis and Model AWT-2500 or AWT-2500A tail wheel skis. · F.Atlee Dodge Aircraft Services - [STC SA02987CH](https://openairdocs.org/stc/SA02987CH.md): Installation of the Electroair Electronic Ignition System · Electroair Acquisition Corporation Next page: https://openairdocs.org/model/piper-pa-18-135-l-21b/stcs.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model FROM ( SELECT stc_number, min(matched_model) AS matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code IN ('7101821') GROUP BY stc_number ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number) ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/model/piper-pa-18-135-l-21b/stcs --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.