ST01085WISafety and emergency equipment
Installation of Honeywell MK VIII Enhanced Ground Proximity Warning System (EGPWS) (with/without optional Avidyne Flight Max 800 MFD).
FAA holder: Blackhawk Aerospace Technologies Inc.
Aircraft STC directory
Beechcraft DH.125 Series 400A STCs
The Jun 30, 2026 FAA DRS snapshot contains 12 selected supplemental type certificates with status Current whose public applicability data names the 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.
12
listed Current at snapshot
10
holder directories
6
modification categories
May 18, 2021
latest recorded revision
Modification demand surface
Other aircraft modifications6
Avionics2
Safety and emergency equipment1
Cargo and special mission1
Aircraft structures1
Electrical systems1
Recorded holders
Aviall Services, Inc.2Bombardier Completion Center Inc2Blackhawk Aerospace Technologies Inc.1Spectrum Aeromed LLC dba Spectrum Aeromed1Pro Star Aviation, LLC1Lee Aerospace Inc.1Aviation Communication and Surveillance Systems (ACSS) LLC1Scandinavian Avionics Design ApS1Securaplane Technologies1Rockwell Collins Inc1
Recently revised DH.125 Series 400A 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
ST02068CHCargo and special mission
Install air ambulance conversion.
FAA holder: Spectrum Aeromed LLC dba Spectrum Aeromed
ST00373BOAvionics
Installation of Rockwell Collins TDR-94D Transponders with ADS-B Out.
FAA holder: Pro Star Aviation, LLC
ST01228WIAircraft structures
Replacement of OEM window pane assemblies with Lee Aerospace laminated window assembly and termination of OEM dry air system.
FAA holder: Lee Aerospace, Inc.
ST02609LAAvionics
Modification to replace the existing Mode S Transponder system with ACSS NXT-700 Mode S Transponder with ADS-B Out.
FAA holder: Aviation Communication and Surveillance Systems (ACSS) LLC
ST03776NYOther aircraft modifications
Modification to upgrade existing Rockwell Collins TCAS (Model: TTR-920, TTR-921, and TTR-4000) at VERSION 7.0 to Rockwell Collins TCAS (Model: TTR-921, TTR-4000, and TTR-4100) at VERSION 7.1 (ACAS II).
FAA holder: Scandinavian Avionics Design ApS
ST01809LAElectrical systems
Installation of Hawker PN 9750W0640 Sealed Lead Acid Battery.
FAA holder: Securaplane Technologies
ST01675WIOther aircraft modifications
Modification of a Rockwell Collins, Inc. File Server Unit (FSU) installation.
FAA holder: Rockwell Collins Inc
SA1185SOOther aircraft modifications
Replace existing batteries with 2371, 2376 or 23491 nickel-cadmium batteries.
FAA holder: Aviall Services, Inc.
ST1003SOOther aircraft modifications
Replace existing lead-acid batteries with Gill BB638/T1-E lead acid batteries, part numbers BSI 200 left and BSI 200 right.
FAA holder: Aviall Services, Inc.
SA137NEOther aircraft modifications
Install Sperry AL-250 altitude alerter system.
FAA holder: Bombardier Completion Center Inc
SA138NEOther aircraft modifications
Install passenger shoulder restraints at side facing divans.
FAA holder: Bombardier Completion Center Inc