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Aircraft STC directory

Piper Aircraft PA-34-220T STCs

The Jun 30, 2026 FAA DRS snapshot contains 37 selected supplemental type certificates with status Current whose public applicability data names the Piper Aircraft PA-34-220T. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

37
listed Current at snapshot
25
holder directories
9
modification categories
Jun 14, 2024
latest recorded revision

Modification demand surface

Other aircraft modifications14
Avionics5
Engine and powerplant5
Flight controls4
Aircraft structures3
Cargo and special mission2
Fuel systems2
Safety and emergency equipment1
Cabin and interiors1

Recorded holders

Honeywell International Inc5Knots 2U Ltd.3Whelen Aerospace Technologies2Turboplus Aircraft Systems, Inc.2Hartzell Engine Technologies, LLC2Absolute Solutions LLC1Aeronautix LLC1Honeywell International Inc (Bendix King)1Flight Boss Ltd.1McFarlane Aviation Inc1Evans & Bailey Holdings LLC1Griggs Aircraft Refinishing LLC1Aerospace Logic Inc.1BAS Inc1Electronics International Inc.1K S Avionics Inc1Micro AeroDynamics Inc1Shadin Avionics1Rosen Sunvisor Systems LLC1Oilamatic Inc1

Recently revised PA-34-220T STCs

Showing the 37 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.