SA02019SE-D (2 OF 3)Avionics
Installation of Garmin GTN 6XX/7XX Navigation System.
FAA holder: Garmin International Inc
Aircraft STC directory
Helio Aircraft H-391B STCs
The Jun 30, 2026 FAA DRS snapshot contains 10 selected supplemental type certificates with status Current whose public applicability data names the Helio Aircraft H-391B. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
10
listed Current at snapshot
6
holder directories
4
modification categories
May 24, 2019
latest recorded revision
Modification demand surface
Other aircraft modifications5
Avionics3
Flight controls1
Aircraft structures1
Recently revised H-391B STCs
Showing the 10 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA00343BO (PAGE 2)Avionics
Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release).
FAA holder: Avidyne Corporation
SA00780SE (PAGE 4)Other aircraft modifications
Installation of the True Lock Safety Retention Axle Lock Nut System.
FAA holder: True Lock LLC
SA284WEAvionics
Installation of Brittain Industries, Inc. Autopilot Model B2D.
FAA holder: Brittain Industries, Inc
SA1491WEFlight controls
Installation of Brittain Industries, Inc. Model B2C Flight Control System.
FAA holder: Brittain Industries, Inc
SA235ALOther aircraft modifications
Installation of modified oleo shock strut.
FAA holder: Airglas Inc.
SA1590CEAircraft structures
Modification of the Helio, P/N 391-030-401-30, main spar carry-thru assembly.
FAA holder: JAARS Inc.
SA1728CEOther aircraft modifications
Modification of the Helio 295-030-401 carry-thru assembly to remove the pads welded to the main lower tube and install full length straps.
FAA holder: JAARS Inc.