# Hawker Siddeley DH.125-3A

- Type: Aircraft model (FAA registry)
- Registry code: 4230126
- Manufacturer (registry): HAWKER SIDDELEY
- Model: DH.125-3A
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 2 · Turbo-jet
- Seats: 10
- Weight class: 20,000 lb and over
- Cruise speed: 320 mph
- Certification: Type certificated
- Data sheet: [TCDS A3EU](https://openairdocs.org/tcds/A3EU) (OpenAirDocs)
- Holder: Textron Aviation Inc.
- Registered aircraft: 0
- Page: https://openairdocs.org/model/hawker-siddeley-dh-125-3a

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2011-01-09](https://openairdocs.org/ad/2011-01-09): Oxygen · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 290 more. Effective Feb 9, 2011
- [AD 2006-01-04](https://openairdocs.org/ad/2006-01-04): Fan venturi motor casing · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 42 more. Effective Feb 22, 2006
- [AD 2005-03-16](https://openairdocs.org/ad/2005-03-16): Engine compartment firewall · Textron BAe.125 Series 800A, BAe.125 Series 800A (C-29A), BAe.125 Series 800A (U-125) and 40 more. Effective Mar 21, 2005
- [AD 2003-07-07](https://openairdocs.org/ad/2003-07-07): Tie-bolt Nuts of Main Landing Gear (MLG) Wheels · Textron BAe.125 Series 800A, BAe.125 Series 800A (C-29A), BAe.125 Series 800A (U-125) and 31 more. Effective May 8, 2003
- [AD 2003-04-20](https://openairdocs.org/ad/2003-04-20): Cylinder Head Lugs of Main Landing Gear (MLG) Actuator · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 43 more. Effective Apr 4, 2003
- [AD 2000-22-03](https://openairdocs.org/ad/2000-22-03): Pitot/Static and Stall Vent Drain Valves · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 43 more. Effective Dec 4, 2000
- [AD 2000-21-11](https://openairdocs.org/ad/2000-21-11): Cockpit Canopy Blister Interface · Textron BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 33 more. Effective Nov 29, 2000
- [AD 2000-02-35](https://openairdocs.org/ad/2000-02-35): Oxygen System Plumbing · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 36 more. Effective Mar 13, 2000
- [AD 89-18-07 R1](https://openairdocs.org/ad/89-18-07-R1): Elevator Balance Spigot · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 34 more. Effective Dec 18, 1998
- [AD 98-05-16](https://openairdocs.org/ad/98-05-16): Main Entry Door/Frame Pressing · Textron DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522 and 4 more. Effective Apr 10, 1998
- [AD 97-03-07](https://openairdocs.org/ad/97-03-07): Main Landing Gear Sidestay Assemblies · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 42 more. Effective Mar 11, 1997
- [AD 95-08-06](https://openairdocs.org/ad/95-08-06): Static Inverter · Textron BAe.125 Series 800A, BH.125 Series 400A, BH.125 Series 600A and 29 more. Effective May 18, 1995
- [AD 93-24-08](https://openairdocs.org/ad/93-24-08): Engine Fire Extinguisher Systems · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Jan 18, 1994
- [AD 93-23-08](https://openairdocs.org/ad/93-23-08): Battery and Emergency Contactors · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Dec 29, 1993
- [AD 93-02-10](https://openairdocs.org/ad/93-02-10): Battery Cables · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 39 more. Effective Mar 26, 1993
- [AD 93-01-10](https://openairdocs.org/ad/93-01-10): Battery Overheating · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 37 more. Effective Mar 2, 1993
- [AD 92-27-09](https://openairdocs.org/ad/92-27-09): Mail Landing Gear Sidestay Upper Arm Assembly · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Jan 27, 1993
- [AD 92-25-11](https://openairdocs.org/ad/92-25-11): Hydraulic Accumulator · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Jan 12, 1993
- [AD 92-22-04](https://openairdocs.org/ad/92-22-04): In-Flight Fire Hazard · Textron BH.125 Series 400A, DH.125 Series 1A, DH.125 Series 1A-522 and 6 more. Effective Nov 24, 1992
- [AD 92-20-03](https://openairdocs.org/ad/92-20-03): Main Landing Gear · Textron DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522 and 7 more. Effective Nov 17, 1992
- [AD 92-16-12 R1](https://openairdocs.org/ad/92-16-12-R1): Tail Cone Vents · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Sep 28, 1992
- [AD 92-11-03](https://openairdocs.org/ad/92-11-03): Eddy Current Inspection · Textron BH.125 Series 400A, DH.125 Series 1A, DH.125 Series 1A-522 and 6 more. Effective Jul 9, 1992
- [AD 92-10-04](https://openairdocs.org/ad/92-10-04): Wing Skin Corrosion · Textron BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 8 more. Effective Jun 11, 1992
- [AD 92-06-05 R1](https://openairdocs.org/ad/92-06-05-R1): Nose Landing Gear · Textron BAe.125 Series 1000B, BAe.125 Series 800A, BAe.125 Series 800A (C-29A) and 38 more. Effective Apr 21, 1992
- [AD 91-19-05](https://openairdocs.org/ad/91-19-05): Fire Extinguisher System Wiring · Textron BAe.125 Series 800A, BH.125 Series 400A, BH.125 Series 600A and 34 more. Effective Sep 26, 1991
- [AD 91-07-12](https://openairdocs.org/ad/91-07-12): Main Landing Gear Hinge Fittings · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Apr 29, 1991
- [AD 91-03-18](https://openairdocs.org/ad/91-03-18): Warming Ovens · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 39 more. Effective Mar 11, 1991
- [AD 91-03-06](https://openairdocs.org/ad/91-03-06): Generator Control Unit · Textron BAe.125 Series 800A, BAe.125 Series 800A (C-29A), BAe.125 Series 800A (U-125) and 36 more. Effective Feb 11, 1991
- [AD 90-03-06](https://openairdocs.org/ad/90-03-06): Corrosion Inspection · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 39 more. Effective Feb 20, 1990
- [AD 89-18-13](https://openairdocs.org/ad/89-18-13): AFM Changes - APU · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 39 more. Effective Sep 28, 1989
- [AD 89-17-06](https://openairdocs.org/ad/89-17-06): Electrical Components · Textron BAe.125 Series 1000A, BAe.125 Series 1000B, BAe.125 Series 800A and 39 more. Effective Sep 15, 1989
- [AD 88-05-02](https://openairdocs.org/ad/88-05-02): Airplane Structure · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Apr 6, 1988
- [AD 87-04-14](https://openairdocs.org/ad/87-04-14): Starter/Generator · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Mar 9, 1987
- [AD 86-21-05](https://openairdocs.org/ad/86-21-05): Forward Engine Mounts · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Oct 20, 1986
- [AD 86-06-04](https://openairdocs.org/ad/86-06-04): Flap Drive Torque Shaft · Textron DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/S-522 and 1 more. Effective Sep 15, 1986
- [AD 82-12-02 R1](https://openairdocs.org/ad/82-12-02-R1): Flap Structure · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Jun 17, 1985
- [AD 85-07-08](https://openairdocs.org/ad/85-07-08): Audio Communication System · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective May 13, 1985
- [AD 84-21-01 R1](https://openairdocs.org/ad/84-21-01-R1): Replacement Fuses - ZL Panel · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Feb 11, 1985
- [AD 84-20-05](https://openairdocs.org/ad/84-20-05): Landing Gear and Brakes · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Oct 14, 1984
- [AD 77-13-09 R1](https://openairdocs.org/ad/77-13-09-R1): Structural Integrity of Bulkhead · Textron BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 7 more. Effective Jun 1, 1984
- [AD 80-12-05 R2](https://openairdocs.org/ad/80-12-05-R2): Nose Landing Gear Drag Stay Assembly · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Mar 16, 1983
- [AD 80-12-10 R1](https://openairdocs.org/ad/80-12-10-R1): Flap Fittings · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Jan 3, 1983
- [AD 82-18-09](https://openairdocs.org/ad/82-18-09): Refueling System · Single point pressure fueling system (Rogerson ATS STC SA1851WE or 4 others). Effective Oct 4, 1982
- [AD 82-12-03](https://openairdocs.org/ad/82-12-03): Ampere Airfuse Installation · Textron BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 8 more. Effective Jun 8, 1982
- [AD 82-12-01](https://openairdocs.org/ad/82-12-01): Main Landing Gear Restrictor Valves · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Jun 8, 1982
- [AD 82-08-07](https://openairdocs.org/ad/82-08-07): Wing Flap System · Textron DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522 and 4 more. Effective Apr 26, 1982
- [AD 81-06-06](https://openairdocs.org/ad/81-06-06): Fuel Feed Lines · Garrett AiResearch TFE-731-3-1H engines (AlliedSignal Aviation Services STC SA3870WE). Effective Mar 26, 1981
- [AD 80-12-13](https://openairdocs.org/ad/80-12-13): Engine Mount Beam · BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 9 more. Effective Jul 14, 1980

Historical (superseded or no longer in force):

- [AD 97-09-12](https://openairdocs.org/ad/97-09-12) (historical): Upper Fuselage Skin · Hawker Beechcraft DH.125 Series 1A, DH.125 Series 1A-522, DH.125 Series 1A/R-522 and 5 more. Effective Jun 6, 1997

All 71: https://openairdocs.org/model/hawker-siddeley-dh-125-3a/ads.md

## Information bulletins (advisory) (1)

- [SAIB NM-15-24](https://openairdocs.org/saib/NM-15-24): Landing Gear. Issued Sep 29, 2015

## Registered aircraft

None registered with this model now.

## NTSB investigations (3)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB NYC01FA084](https://openairdocs.org/ntsb/NYC01FA084), Mar 9, 2001: Hawker Siddeley HS-125-3A (N48DD), Bridgeport, CT, substantial damage. Probable cause: The pilot-in-commands inadequate preflight planning resulting in an approach to a runway with insufficient length. A factor related to the accident was the slush covered runway which resulted in a…
- [NTSB CHI94LA186](https://openairdocs.org/ntsb/CHI94LA186), May 30, 1994: Hawker Siddeley DH-125-3A (N900CD), Waukegan, IL, substantial damage. Probable cause: was the pilot-in-command disregarding the location of the flight manifest container in the cockpit. Factor's associated with the accident were a jammed control column and inadequate procedures for…
- [NTSB FTW89LA146](https://openairdocs.org/ntsb/FTW89LA146), Aug 13, 1989: Hawker Siddeley DH-125-3A (N66HA), Houston, TX, substantial damage. Probable cause: FAILURE OF THE NOSE WHEEL STEERING SYSTEM FOR UNDETERMINED REASONS, AND THE PILOT-IN-COMMAND'S HESITATION REACHING FOR THE NOSE WHEEL STEERING TILLER. A CONTRIBUTING FACTOR WAS HIS LACK OF EXPERIENCE…

## FAA accident and incident reports (2)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20010309004669A](https://openairdocs.org/incident/20010309004669A), Mar 9, 2001: Hwksly DH1253A (N48DD), Bridgeport, CT, Destroyed. (-23) At 1801 hours March 9, 2001, an N48DD, Hawker siddeley DH125-3A, serial number 25115 touchdown on runway 6 bravo at Igor I. Sikorsky memorial airport…
- [Accident 19940530040609A](https://openairdocs.org/incident/19940530040609A), May 30, 1994: Hwksly DH1253A (N900CD), Chicago/Waukega, IL, Substantial damage. High sink rate on final both pilots forced yoke back. Landed hard. Trip manifest pad wedged between yoke seat frame

## STCs that may be installed (OpenAirDocs) (82, first 50)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST02472AT](https://openairdocs.org/stc/ST02472AT): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII. Aircraft Systems and Manufacturing Inc
- [STC ST01930LA](https://openairdocs.org/stc/ST01930LA): Installation of Sandel Avionics SN4500 Electronic Horizontal Situation Indicator (EHSI). Sandel Avionics LLC
- [STC ST11071SC](https://openairdocs.org/stc/ST11071SC): Demonstration of aircraft critical equipment and antenna systems tolerance of radio frequency interference (RFI) from intentional or spurious transmissions from certain Portable Electronic Devices (PEDs). Liberty Partners Inc
- [STC ST00304WI](https://openairdocs.org/stc/ST00304WI): Installation of Keddeg Company 21BC113 coaleser assembly. Purolator Facet, Inc
- [STC ST01228WI](https://openairdocs.org/stc/ST01228WI): Replacement of OEM window pane assemblies with Lee Aerospace laminated window assembly and termination of OEM dry air system. Lee Aerospace, Inc
- [STC ST00781WI-D](https://openairdocs.org/stc/ST00781WI-D): 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. Textron Aviation Inc
- [STC SA1002CE](https://openairdocs.org/stc/SA1002CE): Relocation of warning cancel switch from instrument panel to #1 engine power lever. Textron Aviation Inc
- [STC ST01560CH](https://openairdocs.org/stc/ST01560CH): Install Aero Medical Products Mfg., Inc. Air Ambulance Stretcher P/N 125 using Installation Kit P/N 805. Paul/ Lanna Egan LLC
- [STC ST00415LA](https://openairdocs.org/stc/ST00415LA): Installation of Concorde Battery Model RG-390E. Concorde Battery Corporation
- [STC ST01809LA](https://openairdocs.org/stc/ST01809LA): Installation of Hawker PN 9750W0640 Sealed Lead Acid Battery. Securaplane Technologies
- [STC ST546CH-D](https://openairdocs.org/stc/ST546CH-D): Installation of an AlliedSignal Avionics, Dual GNS-XLS, Flight Management System with GPS as a primary means of navigation. Standard Aero
- [STC ST01380LA](https://openairdocs.org/stc/ST01380LA): Installation of Diamond J, Inc. Engine Indicators N1, N2, and ITT. Gulfstream-California Inc
- [STC ST00682WI-D](https://openairdocs.org/stc/ST00682WI-D): 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 in accordance with Collins Installation Instructions as listed on AML No. ST00682WI-D, Revision -, or later FAA approved revisions. Rockwell Collins Inc
- [STC ST349CH-D](https://openairdocs.org/stc/ST349CH-D): Installation of APU Access Panels. Standard Aero
- [STC ST01623SE](https://openairdocs.org/stc/ST01623SE): Installation of Innovative Solutions and Support (IS&S) Air Data Display Units. AeroMech Incorporated
- [STC ST01003CH-D](https://openairdocs.org/stc/ST01003CH-D): Installation of AlliedSignal Aerospace N1 digital electronic engine control (DEEC). Honeywell International Inc
- [STC ST456CH-D](https://openairdocs.org/stc/ST456CH-D): Installation of AlliedSignal Aerospace TFE731-3D-1H or TFE731-3DR-1H Turbofan Engine(s). Honeywell International Inc
- [STC SA866EA](https://openairdocs.org/stc/SA866EA): Installation of Grimes three light strobe kit. Honeywell International Inc
- [STC ST01760SE](https://openairdocs.org/stc/ST01760SE): ONE-ONLY: Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM), S/N 25150. AeroMech Incorporated
- [STC SA4624SW](https://openairdocs.org/stc/SA4624SW): Replace existing N1, N2 and ITT indicators with Howell autotak and autotemp indicators. Howell Instruments Inc
- [STC ST01606SE](https://openairdocs.org/stc/ST01606SE): 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. AeroMech Incorporated
- [STC ST01946NY](https://openairdocs.org/stc/ST01946NY): Cockpit voice recorder replacement with Universal CVR 30B or CVR120. MidCanada Mod Center
- [STC SA1176EA](https://openairdocs.org/stc/SA1176EA): Installation of Solar T-62T-40C APU when Garrett AiResearch TFE-731-3-1H engines are installed in accordance with STC SA3925WE. PATS Aircraft LLC
- [STC SA1175EA](https://openairdocs.org/stc/SA1175EA): Installation of access doors. PATS Aircraft LLC
- [STC ST01223WI](https://openairdocs.org/stc/ST01223WI): 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. Concorde Battery Corporation
- [STC SA4148NM](https://openairdocs.org/stc/SA4148NM): Cockpit sun visor installation. Rosen Sunvisor Systems LLC
- [STC SA1185SO](https://openairdocs.org/stc/SA1185SO): Replace existing batteries with 2371, 2376 or 23491 nickel-cadmium batteries. Aviall Services, Inc
- [STC ST1003SO](https://openairdocs.org/stc/ST1003SO): Replace existing lead-acid batteries with Gill BB638/T1-E lead acid batteries, part numbers BSI 200 left and BSI 200 right. Aviall Services, Inc
- [STC SA4147SW](https://openairdocs.org/stc/SA4147SW): Installation of one, two and three and four-place side facing seat. Aviation Fabricators Inc
- [STC ST01324LA](https://openairdocs.org/stc/ST01324LA): Installation of Garrett Aviation auxiliary electrical hydraulic system. AiResearch Aivation Service Co
- [STC SA756GL](https://openairdocs.org/stc/SA756GL): Modify radome, P/N 25RF9333A. Saint-Gobain Performance Plastics Corp
- [STC ST01053CH-D](https://openairdocs.org/stc/ST01053CH-D): Installation of an ARTEX 110-406 NAV Emergency Locator Transmitter. Garrett Aviation Services
- [STC ST01136CH-D](https://openairdocs.org/stc/ST01136CH-D): Installation of a Senior Flexonics Inc. Signal conditioner Unit. Garrett Aviation Services
- [STC SA858WE](https://openairdocs.org/stc/SA858WE): Environmental control system. GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services. Lists 125 Series
- [STC SA859WE](https://openairdocs.org/stc/SA859WE): Installation of air conditioning primary feed duct. GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services. Lists DH.125 Series
- [STC SA860WE](https://openairdocs.org/stc/SA860WE): Installation of pressurization control system. GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services. Lists 125 Series
- [STC ST348CH-D](https://openairdocs.org/stc/ST348CH-D): Installation of a Sundstrand Mark VI Ground Proximity Warning System. Garrett Aviation Services
- [STC SA1184SO](https://openairdocs.org/stc/SA1184SO): Replace existing batteries with the SAFT 2371-5 series nickel- cadmium batteries. SAFT America Inc. Lists DH.125 Series
- [STC SE09516SC](https://openairdocs.org/stc/SE09516SC): Modification of nacelle inlet bulkhead. (Equipped with TFE731 engines). Jet Services Enterprises, Inc. Lists DH.125 Series
- [STC ST569CH-D](https://openairdocs.org/stc/ST569CH-D): Installation of a Dual Universal Avionics UNS-1D, Flight Management System with GPS as a primary means of navigation. Garrett Aviation Services
- [STC SA2927WE](https://openairdocs.org/stc/SA2927WE): Installation of logo light on lower surface of horizontal stabilizer. DeVore Aviation Corporation of America, a New Mexico Corporation
- [STC SA857WE](https://openairdocs.org/stc/SA857WE): Installation of Garrett GTCP30-92 or GTCP30-92C auxiliary power unit. UNC/CFC Acquisition Co
- [STC SA1142WE](https://openairdocs.org/stc/SA1142WE): Installation of jump seat. CFC Aviation Services LP
- [STC SA1358WE](https://openairdocs.org/stc/SA1358WE): Installation of a combined airspeed and machmeter indicator. CFC Aviation Services LP
- [STC SA1808NM](https://openairdocs.org/stc/SA1808NM): Installation of shoulder harness for jump seat. CFC Aviation Services LP
- [STC SA7764SW](https://openairdocs.org/stc/SA7764SW): Installation of time-delay relay in fan-operated venturi. Aerex Group, Inc
- [STC SA4084SW](https://openairdocs.org/stc/SA4084SW): Installation of Pitot heat monitor system. Aerex Group, Inc
- [STC SA3925WE](https://openairdocs.org/stc/SA3925WE): Installation of Garrett AiResearch TFE-731-3-1H engines and related changes. AlliedSignal Aviation Services
- [STC SA836NE](https://openairdocs.org/stc/SA836NE): Installation of Fairchild cockpit voice recorder. Innotech Aviation. Lists DH.125 Series

All 82: https://openairdocs.org/model/hawker-siddeley-dh-125-3a/stcs.md

## PMA parts (OpenAirDocs) (548, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [400-21149G-3-305, 400-21149G-3-315, 400-21149G-3-405, 400-21149G-3-415, 400-21149G-3-505, 400-21149G-3-515, 400-21149G-3-605, 400-21149G-3-615, 400-21149G-3-915](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195387574620250603134043.0001): Assy, LRU Adapter (avRDC or MAX). Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [804-1250-10](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192207126420250612143631.0001): avRDC QAR. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [804-1250-32](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168158510420250612143635.0001): avRDC MAX QAR. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [650-0100-05](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163107069620250603134032.0001): Cellular Module, avCM LTE. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [802-0100-04](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID159877857720250603134035.0001): Kit, avCM 4G Adapter. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [400-21149G-3-101, 400-21149G-3-103, 400-21149G-3-105, 400-21149G-3-111, 400-21149G-3-113, 400-21149G-3-115, 400-21149G-3-205, 400-21149G-3-215, 400-21149G-3-715, 400-21149G-3-815](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148779431820250603134039.0001): Assy, LRU Adapter (miniQAR MKIII). Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [21149GK-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145331540120250612143627.0001): Installation Kit, miniQAR / avRDC QAR. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [804-1201, 804-1205, 804-1205-03, 804-1212, 804-1216](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID138145552920250612143623.0001): miniQAR MKIII. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [650-0100-04](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132354161620250603134028.0001): Cellular Module (avCM 4G), GSM / GRPS 4G, Quad Band, SMA. Avionica LLC. · PMA PQ1734CE · Modification part · Apr 18, 2025
- [AAP- 857760-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106046597820250228182136.0001): Seal, Plain, Encased. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell P/N: 857760-1 · Feb 26, 2025
- [PM-80](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103072630120260625165812.0001): Radome Mask. PM Research, Inc. · PMA PQ10049NE · Modification part · Nov 20, 2024
- [UAM100HEM](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID187388594720250310181523.0001): Fuse. Hemico Inc. · PMA PQ2145NE · Replaces UAM100 · Oct 18, 2024
- [HEM25WS619](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID115941443620250310183835.0001): Seal. Hemico Inc. · PMA PQ2145NE · Replaces 25WS619 · Oct 18, 2024
- [M06-201145](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID167133570220240223153733.0001): Label. Miraj Corporation · PMA PQ0870NE · Replaces Safran06-201145 · Feb 15, 2024
- [M06-200001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150992302220240223153731.0001): Label. Miraj Corporation · PMA PQ0870NE · Replaces Safran 06-200001 · Feb 15, 2024
- [804-1216](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155583220320240924135410.0001): miniQAR MKIII. Avionica LLC. · PMA pq1734ce · Modification part · Dec 8, 2023
- [804-1216](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131636454920240924135410.0001): miniQAR MKIII. Avionica LLC. · PMA pq1734ce · Modification part · Dec 8, 2023
- [AAP- 117088](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID107982464920230831200748.0001): Bearing. Approved Air Parts Co Inc · PMA PQ4173NE · Replaces Honeywell P/N 117088 · Aug 28, 2023
- [103278-9 Series 1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150569664020230803184246.0001): Valve, Outflow/Safety. Honeywell International Inc. · PMA PQ1222NM · Replaces 103278-9 · Oct 5, 2022
- [2101818-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163210899920230731171155.0001): Adapter Cable. Honeywell International Inc. · PMA PQ1222NM · Replaces 2101818-2 · Jul 26, 2022
- [2101819-3](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131689901920230731171156.0001): Adapter Cable. Honeywell International Inc. · PMA PQ1222NM · Replaces 2101819-3 · Jul 26, 2022
- [AG627000-13](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID130488688720220809130935.0001): Gasket – Marker Beacon. Aviation Devices & Electronic Components LLC (Av-DEC) · PMA PQ3846SW · Modification part · May 10, 2022
- [AG844000-23](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141798804420220809102605.0001): Gasket – UHF/VHF Antenna. Aviation Devices & Electronic Components LLC (Av-DEC) · PMA PQ3846SW · Modification part · Apr 18, 2022
- [85020-8](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147862969420220624165500.0001): Separator Outline-Water. Honeywell International Inc. · PMA PQ1222NM · Replaces 85020-8 · Feb 15, 2022
- [AG844000-15](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142917681920220408135822.0001): Gasket – UHF/VHF Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Feb 8, 2022
- [AG728000-52](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106620901820220408135736.0001): Gasket – Satcom Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Jan 26, 2022
- [AG627000-23](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116158834920220408135720.0001): Gasket – Marker Beacon. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Dec 15, 2021
- [AG358000-08](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137641864620220408135833.0001): Gasket – ELT Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Nov 17, 2021
- [AG627000-12](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120257217520220408140256.0001): Gasket – Marker Beacon Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Nov 17, 2021
- [NP-UN523-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID744401775520211130185326.0001): Gland Seal. AV8 PMA, LLC. · PMA PQ03885SW · Replaces 25UN523 · Sep 13, 2021
- [SJ8665 FP-009](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID968740832520211021172546.0001): Radome Boot. 3M Aerospace · PMA PQ04414CE · Modification part · Aug 30, 2021
- [SJ8665 FP-009](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID726329010720211021172556.0001): Radome Boot. 3M Aerospace · PMA PQ04414CE · Modification part · Aug 30, 2021
- [AG843000-17](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID390430749820211110110529.0001): Gasket - UHF/VHF Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Aug 9, 2021
- [“](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID927899915320210622142522.0001): “. AeroLEDs LLC · PMA PQ5259NM · Mar 24, 2021
- [“](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID888651024020210622142502.0001): “. AeroLEDs LLC · PMA PQ5259NM · Mar 24, 2021
- [“](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID568607603220210622142449.0001): “. AeroLEDs LLC · PMA PQ5259NM · Mar 24, 2021
- [“](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID409205360202106221425110.0001): “. AeroLEDs LLC · PMA PQ5259NM · Mar 24, 2021
- [“](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID230040780820210622142533.0001): “. AeroLEDs LLC · PMA PQ5259NM · Mar 24, 2021
- [NPFA-AIR117292-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID951858819202111301623250.0001): Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR117292 · Mar 15, 2021
- [NPFA-AIR110418-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID937590706120211130162324.0001): Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR110418 · Mar 15, 2021
- [NPFA-AIR110440-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID913723648920211130162325.0001): Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR110440 · Mar 15, 2021
- [NP-30948-103](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID843934654620211130162329.0001): Cam Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces S30948-2 · Mar 15, 2021
- [NP-30948-101](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID837333973720211130162329.0001): Delta Seal. AV8 PMA, LLC. · PMA PQ03885SW · Replaces S30948-1 · Mar 15, 2021
- [NP-25988/1-903](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID835093734420211130162327.0001): O-Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces DHS1650A · Mar 15, 2021
- [NP-UM495-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID817051425620211130162326.0001): Wiper Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces 21UM495-7 · Mar 15, 2021
- [NPFA-AIR110410-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID802835978720211130162324.0001): Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR110410 · Mar 15, 2021
- [NPFA-AIR45224-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID594942248920211130162321.0001): Seal. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR45224 · Mar 15, 2021
- [NP-UM495-9](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID491729744320211130162326.0001): Wiper Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces 21UM495-9 · Mar 15, 2021
- [NPFA-AIR46174-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID468750219820211130162323.0001): Seal. AV8 PMA, LLC. · PMA PQ03885SW · Replaces AIR46174 · Mar 15, 2021
- [NPFA25-6UM31-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID454978320211130162319012.0001): Ring. AV8 PMA, LLC. · PMA PQ03885SW · Replaces 25-6UM31 · Mar 15, 2021

All of them: https://openairdocs.org/model/hawker-siddeley-dh-125-3a/pma.md

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