SA1002CEAvionics
Relocation of warning cancel switch from instrument panel to #1 engine power lever.
FAA holder: Textron Aviation Inc
Aircraft STC directory
Raytheon Aircraft DH.125 Series 3A STCs
The Jun 30, 2026 FAA DRS snapshot contains 12 selected supplemental type certificates with status Current whose public applicability data names the Raytheon Aircraft DH.125 Series 3A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
12
listed Current at snapshot
9
holder directories
5
modification categories
Dec 1, 2016
latest recorded revision
Modification demand surface
Other aircraft modifications7
Electrical systems2
Avionics1
Cabin and interiors1
Safety and emergency equipment1
Recently revised DH.125 Series 3A STCs
Showing the 12 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SA4624SWOther aircraft modifications
Replace existing N1, N2 and ITT indicators with Howell autotak and autotemp indicators.
FAA holder: Howell Instruments Inc
ST01606SEOther aircraft modifications
Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM). Descriptive data pertaining to this design change are considered inadequate for duplication on other products. This approval is limited to Hawker Siddeley DH.125 Series 3A, Serial Number 25118 only.
FAA holder: AeroMech Incorporated
SA1176EAOther aircraft modifications
Installation of Solar T-62T-40C APU when Garrett AiResearch TFE-731-3-1H engines are installed in accordance with STC SA3925WE.
FAA holder: PATS Aircraft LLC
ST01223WIElectrical systems
Replacement of the original nickel-cadmium battery with a Concorde Valve Regulated Sealed-Lead-Acid (VRSLA) RG-125 series Battery in the Raytheon Model BH.125, DH.125 and HS.125 Airplanes in accordance with Concorde Battery Corporation Master Drawing List, Drawing No. 5-0207, Revision C, dated October 31, 2003, or later FAA approved revision.
FAA holder: Concorde Battery Corporation
SA4148NMOther aircraft modifications
Cockpit sun visor installation.
FAA holder: Rosen Sunvisor Systems LLC
SA4147SWCabin and interiors
Installation of one, two and three and four-place side facing seat.
FAA holder: Aviation Fabricators Inc
ST01324LAElectrical systems
Installation of Garrett Aviation auxiliary electrical hydraulic system.
FAA holder: AiResearch Aivation Service Co
SA756GLOther aircraft modifications
Modify radome, P/N 25RF9333A.
FAA holder: Saint-Gobain Performance Plastics Corp
ST01053CH-DSafety and emergency equipment
Installation of an ARTEX 110-406 NAV Emergency Locator Transmitter.
FAA holder: Garrett Aviation Services
ST01136CH-DOther aircraft modifications
Installation of a Senior Flexonics Inc. Signal conditioner Unit.
FAA holder: Garrett Aviation Services