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 400A STCs
The Jun 30, 2026 FAA DRS snapshot contains 20 selected supplemental type certificates with status Current whose public applicability data names the Raytheon Aircraft 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
13
holder directories
6
modification categories
Dec 1, 2016
latest recorded revision
Modification demand surface
Other aircraft modifications9
Avionics3
Safety and emergency equipment3
Cabin and interiors2
Electrical systems2
Fuel systems1
Recorded holders
Garrett Aviation Services4PATS Aircraft LLC3Bombardier Completion Center Inc2Textron Aviation Inc1Envoy Aerospace LLC1AeroMech Incorporated1Howell Instruments Inc1Midcoast Aviation Inc1Concorde Battery Corporation1Rosen Sunvisor Systems LLC1Aviation Fabricators Inc1Saint-Gobain Performance Plastics Corp1Rockwell Collins Inc1
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
SA786EACabin and interiors
Installation of lavatory door and bulkhead at station 392.
FAA holder: Garrett Aviation Services
ST02171CHAvionics
Installation of dual Innovative Solutions and Support Air Data Display Uits and dual Analog Interface Units.
FAA holder: Envoy Aerospace LLC
ST01505SEOther aircraft modifications
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 400A, Serial Number NA742 only. Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM).
FAA holder: AeroMech Incorporated
SA4624SWOther aircraft modifications
Replace existing N1, N2 and ITT indicators with Howell autotak and autotemp indicators.
FAA holder: Howell Instruments Inc
SA674CEOther aircraft modifications
Installation of Solar T-62T-39Y, -39 or -40C APU modifications.
FAA holder: PATS Aircraft LLC
SA1173EAOther aircraft modifications
Rework of Solar T-62T-39 APU installed by STC SA674CE when Garrett AiResearch TFE-731-3-1H engines are installed per STC SA3870WE.
FAA holder: PATS Aircraft LLC
ST00976WISafety and emergency equipment
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
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
ST00784CH-DOther aircraft modifications
Installation of a Honeywell TCAS 2000 Traffic Alert and Collision Avoidance System with dual Mode S Transponders.
FAA holder: Garrett Aviation Services
SA1110EASafety and emergency equipment
Installation of emergency lighting system to meet the retroactive requirements of FAR 25.2.
FAA holder: Bombardier Completion Center Inc
SA641NEFuel systems
Access panel installation on the ventral fuel tank.
FAA holder: Bombardier Completion Center Inc
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
SA1019SWAvionics
Installation of Collins AP-104 autopilot and FD-109H/FD-109F flight directors with associated sensory equipment.
FAA holder: Rockwell Collins Inc