SA01800SE (PG 2)Avionics
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
FAA holder: Seaton Engineering Corp.
Aircraft STC directory
Alliance Aircraft Group HST-550 STCs
The Jun 30, 2026 FAA DRS snapshot contains 6 selected supplemental type certificates with status Current whose public applicability data names the Alliance Aircraft Group HST-550. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
6
listed Current at snapshot
2
holder directories
4
modification categories
Jul 16, 2019
latest recorded revision
Modification demand surface
Other aircraft modifications2
Aircraft connectivity2
Avionics1
Fuel systems1
Recorded holders
Recently revised HST-550 STCs
Showing the 6 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA01861SE (PAGE 2)Other aircraft modifications
Fabrication and installation of Landing Light Controller.
FAA holder: Seaton Engineering Corp.
SA01473SE (3 OF 5)Other aircraft modifications
Installation of a GTX 32 (mode C), GTX 33 (mode S), or GTX 33D (mode S with diversity) Remote Transponde.
FAA holder: Garmin AT Inc.
SA01487SE (5 OF 5Aircraft connectivity
Installation of a GDL 69 or GDL 69A XM Satellite Receiver in accordance with Garmin Supplemental Type Certificate Master Data List, P/N 005-C0217-00, Revision A, dated December 20, 2004, or later FAA approved revision.
FAA holder: Garmin AT Inc.
SA01487SE (2 OF 5)Aircraft connectivity
Installation of a GDL 69 or GDL 69A XM Satellite Receiver in accordance with Garmin Supplemental Type Certificate Master Data List, P/N 005-C0217-00, Revision A, dated December 20, 2004, or later FAA approved revision.
FAA holder: Garmin AT Inc.
SA02644ATFuel systems
Installation of modified fuel system. Limited to installation on model HST-550, serial number 001 ONLY.
FAA holder: Mojoe LLC