Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System.
FAA holder: Garmin International Inc.
Aircraft STC directory
Helio Aircraft HST-550 STCs
The cited FAA DRS record snapshots contain 4 selected supplemental type certificates with status Current whose public applicability data names the Helio Aircraft HST-550. 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
4
holder directories
2
modification categories
Jul 2, 2026
latest recorded revision
Modification demand surface
Recently revised HST-550 STCs
Showing the 4 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
Installation of BendixKing KFD 900 Flight Display System.
FAA holder: Honeywell International Inc. (Bendix King)