# STCs that may be installed: Air Tractor AT-503A

A list on [Air Tractor AT-503A](https://openairdocs.org/model/air-tractor-at-503a.md).

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

- [STC SA01800SE](https://openairdocs.org/stc/SA01800SE.md): Fabrication and installation of new or replacement of existing instrument panel lights dimmer control. · TCW Technologies, LLC
- [STC SA01861SE](https://openairdocs.org/stc/SA01861SE.md): Fabrication and installation of Landing Light Controller · TCW Technologies, LLC
- [STC SA09719AC](https://openairdocs.org/stc/SA09719AC.md): Installation electrostatic spray equipment and controls · Zee Systems Inc.
- [STC SA12204WI](https://openairdocs.org/stc/SA12204WI.md): Wing Spar Cap manufacturing process change · Air Tractor Inc.
- [STC SA02738CH](https://openairdocs.org/stc/SA02738CH.md): Installation of L-3 Communications Avionics Systems · Acron Aviation Inc.
- [STC SA04046CH PAGE 1](https://openairdocs.org/stc/SA04046CH%20PAGE%201.md): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500) · Acron Aviation Inc.
- [STC SA01240SE](https://openairdocs.org/stc/SA01240SE.md): Installation of secondary voltage indication system · Visual Instruments LLC
- [STC SA02444AK](https://openairdocs.org/stc/SA02444AK.md): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed · ADS-B Technologies LLC
- [STC SA00888SE](https://openairdocs.org/stc/SA00888SE.md): Option 1: Install Walter M601-E11S engine and a Hartzell HC-B3TW-3/T10282N+4 propeller or a Walter M601-E11 engine and an Avia V508-E-AG 106/A propeller per the Master Drawing List and Installation Instructions given in Approved Model List SA00888SE. (Note: Prior to July 17, 2002, the model M601-E11S engine was designated as the model M601-E11 engine). Option 2: Install a Walter M601-D11 engine and Avia V508-E-AG 106/A propeller per Cascade Flying Service Master Drawing List CFS-MDL-0001 Rev G, dated June 15, 2004, and Cascade Flying Service Document CFS-IM-107, Rev A, dated July 29, 2003, “Installation Instructions for Walter Turbine Installation on Air Tractor 300 & 400 Series Ag Aircraft,” or later FAA-approved revisions to these documents. NOTE: The Air Tractor model AT-400, AT-402B, AT-502, AT-502B, and AT-503A airplanes are not eligible for modification under option 2. · Cascade Flying Service LLC
- [STC SA02135SE](https://openairdocs.org/stc/SA02135SE.md): Installation of Electronics International Inc. Glass Panel Engine Monitor (with In-Flight Data) · Electronics International Inc.
- [STC SA04165NY](https://openairdocs.org/stc/SA04165NY.md): Installation of Latitude Technologies Skynode S200 Satcom system must be performed · Latitude Technologies Corporation
- [STC SA01323CH](https://openairdocs.org/stc/SA01323CH.md): Installation of a ground single point fueling system. · Turbine Conversions Ltd
- [STC SA02205SE](https://openairdocs.org/stc/SA02205SE.md): Installation of a replacement airframe fuel pump in accordance with Cascade Flying Service Master Drawing List FW-CFS545-90, Rev. B, dated October 19, 2011, or later FAA approved revision. · Cascade Aircraft conversions LLC
- [STC SA01745WI](https://openairdocs.org/stc/SA01745WI.md): Installation of a Cable Cutter System on the Main Landing Gear · Hershey Flying Service Inc
- [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 SA02276AK](https://openairdocs.org/stc/SA02276AK.md): Installation of AMSAFE Aviation Inflatable Restraints · AMSAFE Inc.
- [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 SA03439CH](https://openairdocs.org/stc/SA03439CH.md): Installation of a Hartzell Propeller model.HC-B4TN-3C/T10702NS (4 Blade) · Aero Innovations LLC
- [STC SA02442AK PAGE 1](https://openairdocs.org/stc/SA02442AK%20PAGE%201.md): Approval of the L-3 Communications NGT 2000/2500 ADS-B system · ADS-B Technologies, LLC
- [STC SA01669CH](https://openairdocs.org/stc/SA01669CH.md): Installation of Challenger Reusable Air Filter · Challenger Aviation Products Inc.
- [STC ST03554CH](https://openairdocs.org/stc/ST03554CH.md): Installation of Rotary Gatekeeper and provisions equipment · Turbine Conversions Ltd
- [STC SA02985CH](https://openairdocs.org/stc/SA02985CH.md): Installation of a Cool Start System in accordance with Installation Instructions, Revision A, dated April 14, 2011, or later FAA Approved revision. · Turbine Conversions Ltd
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE.md): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1) · Electronics International Inc.
- [STC SA02110CH](https://openairdocs.org/stc/SA02110CH.md): Installation of a Time Trac Data Recorder · P2 Incorporated
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM.md): Installation of Electronics International digital volt/amp gauges and accessories. · Electronics International Inc.
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM.md): Precise Flight Inc. Pulselite Control System · Precise Flight Inc
- [STC SA00171BO](https://openairdocs.org/stc/SA00171BO.md): Installation of Pratt & Whitney Engine Services, Inc. Aircraft Data Acquisition System ADAS+, P/N ADAS-K-010. · Pratt & Whitney Engine Services Inc.
- [STC SA01639NY](https://openairdocs.org/stc/SA01639NY.md): Replacement of 12 refrigerant in air conditioning system with Enviro Refrigerant Hotshot R414B. · Scale Modelbuilders Inc.
- [STC SA01258SE](https://openairdocs.org/stc/SA01258SE.md): Installation of the Automatic Flagman Dispenser Models in accordance with Automatic Flagman Master Drawing Lists specified in attached AML, or later FAA approved revision.This STC supercedes several existing STC s as listed in the notes on the attached AML. · R-S Sales Inc.
- [STC SA4735NM](https://openairdocs.org/stc/SA4735NM.md): Installation of automatic flagman Model 4 dispensor system on the upper surface of the right wing root. · R-S Sales Inc.
- [STC SA00569WI](https://openairdocs.org/stc/SA00569WI.md): Installation of a Compro Aviation Driftfinder DFS-10 system which injects oil into engine exhaust to produce smoke that determines wind speed and direction. · Compro Aviation Inc
- [STC SA00390SE](https://openairdocs.org/stc/SA00390SE.md): Fabrication and installation of vortex generators and delta wings mounted on wings, and strakes mounted above left- and right-hand wing/fuselage junctions. · Aeronautical Testing Service Inc.
- [STC SA00648AT](https://openairdocs.org/stc/SA00648AT.md): Installation of chemical rinsing system. · Paul S Woods
- [STC SA00144AT](https://openairdocs.org/stc/SA00144AT.md): Installation of a WAG freon air conditioning system. · WAG Corporation

## 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 ('0390304')
  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/air-tractor-at-503a/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.