SR04637CHElectrical systems
Replacement of existing main ship battery with Lithium Ion Battery and installation of Annunciator Control Panel.
FAA holder: Airwolf Aerospace LLC
Aircraft STC directory
The Jun 30, 2026 FAA DRS snapshot contains 4 selected supplemental type certificates with status Current whose public applicability data names the Enstrom Helicopter TH-28. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Showing the 4 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
FAA holder: Airwolf Aerospace LLC
FAA holder: Airwolf Aerospace LLC
FAA holder: AspenSTC Inc
FAA holder: Papas Gary Los Angeles Laboratories Inc.