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Aircraft STC directory

US Helicopter TH-1L STCs

The Jun 30, 2026 FAA DRS snapshot contains 4 selected supplemental type certificates with status Current whose public applicability data names the US Helicopter TH-1L. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

4
listed Current at snapshot
3
holder directories
3
modification categories
Dec 8, 2011
latest recorded revision

Modification demand surface

Other aircraft modifications2
Aircraft structures1
Avionics1

Recorded holders

Dart Aerospace Limited2Global Spar LLC1Aerosonic Corporation1

Recently revised TH-1L STCs

Showing the 4 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.