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Aircraft STC directory

Air Tractor AT-503 STCs

The Jun 30, 2026 FAA DRS snapshot contains 28 selected supplemental type certificates with status Current whose public applicability data names the Air Tractor AT-503. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

28
listed Current at snapshot
16
holder directories
7
modification categories
Feb 27, 2026
latest recorded revision

Modification demand surface

Other aircraft modifications12
Avionics6
Engine and powerplant3
Aircraft structures2
Aircraft connectivity2
Fuel systems2
Landing gear and brakes1

Recorded holders

Electronics International Inc.3Turbine Conversions Ltd3Acron Aviation Inc.2ADS-B Technologies, LLC2Seaton Engineering Corp.2R-S Sales Inc.2Latitude Technologies Corporation1Cascade Flying Service LLC1Cascade Aircraft conversions LLC1Hershey Flying Service Inc1Avidyne Corporation1AMSAFE Inc.1Garmin International Inc1P2 Incorporated1Precise Flight Inc1Pratt & Whitney Engine Services Inc.1

Recently revised AT-503 STCs

Showing the 28 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA09719ACOther aircraft modifications

Installation electrostatic spray equipment and controls in accordance with ZEE Systems, Inc. Document Number Z03-1 MDL-MDI, Revision D, dated 10-22-10; Airplane Flight Manual Supplement Document Number Z03-AFMS, Rev IR dated 12/27/2010; Instructions for Continued Airworthiness (ICA), Z03K000, Rev IR, dated 11-15-10, or later FAA approved revision are a required part of this modification.

FAA holder: Spectrum Electrostatic Sprayers Inc.

View record