# STCs that may be installed: Mckinnon G21C

A list on [Mckinnon G21C](https://openairdocs.org/model/mckinnon-g21c.md).

In force first, then newest. The registry doesn’t record which STCs an aircraft has.

- [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 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 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 SA02679SE](https://openairdocs.org/stc/SA02679SE.md): Increase in gross weight to 12,500 pounds · Snow Goose Aviation LLC
- [STC SA02658SE](https://openairdocs.org/stc/SA02658SE.md): Installation of Garmin GI 275 Multi-Function Display System · Garmin International Inc.
- [STC SA04776NY](https://openairdocs.org/stc/SA04776NY.md): The HIPEC Covering and Finishing System must be performed and maintained · HIPEC Aircraft Coatings Inc.
- [STC SA01714WI](https://openairdocs.org/stc/SA01714WI.md): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems. · Garmin International Inc
- [STC SA00344BO PAGE 1](https://openairdocs.org/stc/SA00344BO%20PAGE%201.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies
- [STC SA02153LA-D PAGE 1](https://openairdocs.org/stc/SA02153LA-D%20PAGE%201.md): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System · Garmin International Inc.
- [STC SA02212AK](https://openairdocs.org/stc/SA02212AK.md): Replacement of existing landing and/or taxi light reflector and bulbs with high intensity discharge (HID) lighting systems · Seaplanes North LLC
- [STC SA00382BO](https://openairdocs.org/stc/SA00382BO.md): Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes · Avidyne Corporation
- [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 1](https://openairdocs.org/stc/SA00352BO%20PAGE%201.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 SA01734SE](https://openairdocs.org/stc/SA01734SE.md): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. · Andrew D. Humphrey
- [STC SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201.md): Installation of Garmin GDL 88 ADS-B UAT Transceiver System · Garmin International Inc
- [STC SA02121SE](https://openairdocs.org/stc/SA02121SE.md): Installation of Garmin GTS 825 (TAS) or GTS 855 (TCAS I) Traffic System · Garmin International Inc
- [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D.md): Installation of replacement fuel tank sealant system · FFC Manufacturing
- [STC SA593CH](https://openairdocs.org/stc/SA593CH.md): Install Champion SlickSTART magneto booster system. · Champion Aerospace LLC
- [STC SA1751WE](https://openairdocs.org/stc/SA1751WE.md): Increase in main fuel tank capacity to 336 gallons. · Atlantic Coast Sea Planes LLC
- [STC SA1320WE](https://openairdocs.org/stc/SA1320WE.md): G-21C: Installation of two United Aircraft of Canada Drawing List Model PT6A-20 engines. G-21D: installation of two United Aircraft of Canada Ltd Model PT6A-20 engines, Alvarez-Calderon wing flaps, and related changes. · Atlantic Coast Sea Planes LLC
- [STC SA02168AK](https://openairdocs.org/stc/SA02168AK.md): Installation of hourmeter airspeed switch. For unpressurized aircraft only. Pressurized aircraft must have pressurization system deactivated. · Avalaska Inc
- [STC SA3494SW-D](https://openairdocs.org/stc/SA3494SW-D.md): Installation of a century automatic flight system. · Century Flight Systems Inc
- [STC SA1351WE](https://openairdocs.org/stc/SA1351WE.md): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12) · Ceconite Inc
- [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D.md): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System · Garmin International Inc

## 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 ('5550102')
  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/mckinnon-g21c/stcs

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