Aircraft STC directory
Raytheon Aircraft HS.125 Series 600A STCs
The Jun 30, 2026 FAA DRS snapshot contains 23 selected supplemental type certificates with status Current whose public applicability data names the Raytheon Aircraft HS.125 Series 600A. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Modification demand surface
Recorded holders
Recently revised HS.125 Series 600A STCs
Showing the 23 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Installation of Collins FD 109Z and FD 109Y flight director system.
FAA holder: Page AvJet Corp
ONE-ONLY: Installation of IS&S Dual Digital Air Data System, serial number 256066.
FAA holder: Global Aviation Technologies
Reduced Vertical Separation Minimum (RVSM) non-group airworthiness approval.
FAA holder: Kohlman Systems Research Inc.
Descriptive data pertaining to this design change are considered inadequate for duplication on other products. This approval is limited to the Hawker Siddeley Model HS.125-600A, Serial Number 256029 only. Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM).
FAA holder: AeroMech Incorporated
Installation of lavatory door and bulkhead at station 392.
FAA holder: Garrett Aviation Services
Limited to installation on Raytheon model HS.125 series 600A, serial number 256045 ONLY. Non-group aircraft certification for Reduced Vertical Separation Minimum (RVSM) operational capability.
FAA holder: Elliott Aviation Technical Products
Installation of Innovative Solutions & Support (IS&S) dual Air Data Display Units (ADDU) and single Analog Interface Unit (AIU).
FAA holder: Elliott Aviation Technical Products
Descriptive data pertaining to this design change are considered inadequate for duplication on other products. This approval is limited to the Hawker Siddeley Model HS.125-600A, Serial Number 256065 only.
FAA holder: AeroMech Incorporated
Installation of the Honeywell MK-VIII Enhanced Ground Proximity Warning System (EGPWS). Data required: (1) Midcoast Certification Drawing List No. 23-327G001 Revision E, dated February 27, 2002; (2) FAA Approved Midcoast Airplane Flight Manual Supplement, Document No. 23-327M002, Revision A, dated February 27, 2002; or later FAA Approved Revisions to (1) or (2).
FAA holder: Midcoast Aviation Inc
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
Installation of the Honeywell MK VII Enhanced Ground Proximity Warning System. Data Required: (1) Midcoast Master Data List No. 24-327G003 revision B, dated June 4, 2003, or later FAA approved revision. (2) FAA Approved Airplane Flight Manual Supplement, Midcoast Report Number 24-327M003 revision NC, dated June 9, 2003, or later FAA Approved revision.
FAA holder: Midcoast Aviation Inc
Cockpit sun visor installation.
FAA holder: Rosen Sunvisor Systems LLC
Installation of Garrett Aviation auxiliary electrical hydraulic system.
FAA holder: AiResearch Aivation Service Co
Installation of a Honeywell TCAS 2000 Traffic Alert and Collision Avoidance System with dual Mode S Transponders.
FAA holder: Garrett Aviation Services
Installation of oxygen system.
FAA holder: Bombardier Completion Center Inc
Installation of emergency lighting system to meet the retroactive requirements of FAR 25.2.
FAA holder: Bombardier Completion Center Inc
Installation of Jet AI-804 emeregency horizon system..
FAA holder: Bombardier Completion Center Inc
Access panel installation on the ventral fuel tank.
FAA holder: Bombardier Completion Center Inc
Installation of an ARTEX 110-406 NAV Emergency Locator Transmitter.
FAA holder: Garrett Aviation Services
Installation of a Senior Flexonics Inc. Signal conditioner Unit.
FAA holder: Garrett Aviation Services