ST00304WIOther aircraft modifications
Installation of Keddeg Company 21BC113 coaleser assembly.
FAA holder: Purolator Facet, Inc
Aircraft STC directory
Hawker Beechcraft DH.125 Series 400A STCs
The Jun 30, 2026 FAA DRS snapshot contains 20 selected supplemental type certificates with status Current whose public applicability data names the Hawker Beechcraft DH.125 Series 400A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
20
listed Current at snapshot
10
holder directories
6
modification categories
Oct 19, 2017
latest recorded revision
Modification demand surface
Other aircraft modifications9
Avionics5
Engine and powerplant3
Cargo and special mission1
Electrical systems1
Safety and emergency equipment1
Recently revised DH.125 Series 400A STCs
Showing the 20 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
ST00780WI-DOther aircraft modifications
Modification of Collins VHF-22A/VHF-22B VHF COMM Receiver Transmitter with CTL-22 Control Pro Line II System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II System Installation.
FAA holder: Textron Aviation Inc
ST00781WI-DOther aircraft modifications
Modification of Collins VHF-20/VHF-20A/VHF-20B VHF COMM Receiver Transmitter with CTL-20 Control Pro Line I System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II System Installation.
FAA holder: Textron Aviation Inc
ST01560CHCargo and special mission
Install Aero Medical Products Mfg., Inc. Air Ambulance Stretcher P/N 125 using Installation Kit P/N 805.
FAA holder: Paul/ Lanna Egan LLC
ST546CH-DAvionics
Installation of an AlliedSignal Avionics, Dual GNS-XLS, Flight Management System with GPS as a primary means of navigation.
FAA holder: Standard Aero
SA2404WEElectrical systems
Consolidation of STC s SA355CE and SA362CE into one STC having a Master Eligibility List and amendment of these STC s to include and improved Power Supply Assembly and Subchassis Timer Assembly for the Twilighter MK III high intensity supplementary lighting system in accordance with the applicable FAA sealed drawing listed on the attached sealed Master Eligibility List Number SA2404WE.
FAA holder: BF Goodrich Aerospace
SA355CEOther aircraft modifications
: Installation of Hoskins Twilighter MK/III B High Intensity Lighting System.
FAA holder: BF Goodrich Aerospace
ST01380LAEngine and powerplant
Installation of Diamond J, Inc. Engine Indicators N1, N2, and ITT.
FAA holder: Gulfstream-California Inc.
ST01486SE-DOther aircraft modifications
Group aircraft approval for Reduced Vertical Separation Minimum (RVSM).
FAA holder: AeroMech Incorporated
ST01623SEAvionics
Installation of Innovative Solutions and Support (IS&S) Air Data Display Units.
FAA holder: AeroMech Incorporated
ST01003CH-DEngine and powerplant
Installation of AlliedSignal Aerospace N1 digital electronic engine control (DEEC).
FAA holder: Honeywell International Inc
ST01514CH-DAvionics
Installation of Universal Avionics Systems Corporation Terrain Awareness Warning System (TAWS), Software Control (SCN) 10.X and Universal Multi-Function Display (MFD).
FAA holder: Duncan Aviation Inc
ST456CH-DEngine and powerplant
Installation of AlliedSignal Aerospace TFE731-3D-1H or TFE731-3DR-1H Turbofan Engine(s).
FAA holder: Honeywell International Inc
SA180NEAvionics
Installation of Teledyne Avionics normalized angle of attack indicating system P/N 112B5700.
FAA holder: Aerosonic Corporation
SA844EAAvionics
Installation of Teledyne Avionics Angle of Attack System SL112B300.
FAA holder: Aerosonic Corporation
SA866EAOther aircraft modifications
Installation of Grimes three light strobe kit.
FAA holder: Honeywell International Inc.
ST00546DESafety and emergency equipment
Installation of Honeywell MK VI Ehanced Ground Proximity Warning System (EGPWS).
FAA holder: Aircraft Maintenance & Management Company dba Haggan Aviation
ST00547DEOther aircraft modifications
Installation of Honeywell CAS-67 Traffic Collision Avoidance System (TCAS) and dual MST-67 Mode S transponders.
FAA holder: Aircraft Maintenance & Management Company dba Haggan Aviation
ST01281SEOther aircraft modifications
Non-Group (individual) aircraft approved for Reduced Vertical Separation Minimum (RVSM).
FAA holder: AeroMech Incorporated