SA10236SC (1 OF 4)Other aircraft modifications
Installation of a GDC 31 Roll Steering Converter.
FAA holder: DAC International Inc
Aircraft STC directory
Alliance Aircraft Group H-250 STCs
The Jun 30, 2026 FAA DRS snapshot contains 13 selected supplemental type certificates with status Current whose public applicability data names the Alliance Aircraft Group H-250. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
13
listed Current at snapshot
9
holder directories
6
modification categories
Jul 17, 2020
latest recorded revision
Modification demand surface
Other aircraft modifications6
Fuel systems2
Aircraft connectivity2
Avionics1
Aircraft structures1
Engine and powerplant1
Recently revised H-250 STCs
Showing the 13 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA01800SE (PG 2)Avionics
Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.
FAA holder: Seaton Engineering Corp.
SA01861SE (PAGE 2)Other aircraft modifications
Fabrication and installation of Landing Light Controller.
FAA holder: Seaton Engineering Corp.
SA00769CHOther aircraft modifications
Installation of Champion Limited Authority Spark Advance Regulator (LASARTM) ignition system with Cylinder Head Temperature (CHT) monitoring capability on airframes with FAA approved installations of Textron Lycoming model IO-540, AEIO-540 and HIO-540 engines.
FAA holder: Champion Aerospace LLC
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.
SA917EAAircraft structures
Installation of Grimes aviation white anti-collision strobe light system two light or three light series 555 for wing tips and tail, P/N 30-0555-( ).
FAA holder: Honeywell International Inc.
SA1316GLFuel systems
Installation of a Shadin Co. Fuel Flow Indicating System.
FAA holder: Shadin Avionics
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.
SA00680SE (5 OF 6Engine and powerplant
Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer.
FAA holder: Electronics International
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.
SA02217AK (1 OF 5)Other aircraft modifications
Installation of Garmin AT Model GDL90 UAT Data Link System, in accordance with Garmin AT, Inc., GDL 90 UAT Master Data List, P/N 560-0278-01, Revision A, dated November 12, 2004, or later FAA approved revision.
FAA holder: Garmin AT Inc.
SA02655AT (1 OF 2)Other aircraft modifications
Installation of JAARS Model F5K Automatic Flight Following System (AFFS) in Helio H-295 type aircraft.
FAA holder: JAARS Inc.
SA01205ATFuel systems
Installation of left hand side and right hand side main tank fuel cell assemblies. (H-395 (USAF L-28A or U-10B) ALL S/N'S).
FAA holder: Floats & Fuel Cells