# Hawker Siddeley DH.125-1A/522

- Type: Aircraft model (FAA registry)
- Registry code: 4230110
- Manufacturer (registry): HAWKER SIDDELEY
- Model: DH.125-1A/522
- 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-125-1a-522

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 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
- [AD 73-13-10 R2](https://openairdocs.org/ad/73-13-10-R2): Outer Flap Hinge Fittings · Textron BH.125 Series 400A, BH.125 Series 600A, DH.125 Series 1A and 7 more. Effective Jun 23, 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 72: https://openairdocs.org/model/hawker-siddeley-dh-125-1a-522/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 (1)

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 LAX91FA132](https://openairdocs.org/ntsb/LAX91FA132), Mar 16, 1991: Hawker Siddeley DH.125-1A/522 (N831LC), San Diego, CA, destroyed, 10 fatal. Probable cause: IMPROPER PLANNING/DECISION BY THE PILOT, THE PILOT'S FAILURE TO MAINTAIN PROPER ALTITUDE AND CLEARANCE OVER MOUNTAINOUS TERRAIN, AND THE COPILOT'S FAILURE TO ADEQUATELY MONITOR THE PROGRESS OF THE…

## 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 19910316005479A](https://openairdocs.org/incident/19910316005479A), Mar 16, 1991: Hwksly DH1251A522 (N831LC), San Diego, CA, Destroyed, 10 fatal. Collided with mountain slope 172 ft from top,VFR departure planned,IFR after takeoff,normal takeoff observed.
- [Incident 19840702037389I](https://openairdocs.org/incident/19840702037389I), Jul 2, 1984: Hwksly DH1251A522 (N6SS), Philadelphia, PA, Minor damage. Right engine lost power on approach. Landed without incident.

## STCs that may be installed (OpenAirDocs) (92, 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 ST12461IB](https://openairdocs.org/stc/ST12461IB): Installation of Cockpit Voice Recorder with optional RIPS Upgrade. Mid- Canada Mod Center
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [STC SA126NE](https://openairdocs.org/stc/SA126NE): Installation of Teledyne Avionics normalized angle of attack indicating system, P/N 112B4700. Aerosonic Corporation. Lists DH.125 Series 1A
- [STC SA866EA](https://openairdocs.org/stc/SA866EA): Installation of Grimes three light strobe kit. Honeywell International Inc
- [STC ST01733SE](https://openairdocs.org/stc/ST01733SE): ONE-ONLY: Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM), S/N 25032. AeroMech Incorporated. Lists DH.125 Series 1A
- [STC ST01728SE](https://openairdocs.org/stc/ST01728SE): ONE-ONLY: Non-Group (Individual) aircraft approval for Reduced Vertical Separation Minimum (RVSM), S/N 25101. AeroMech Incorporated. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [STC SA1143EA](https://openairdocs.org/stc/SA1143EA): Limited to installation on model DH.125-1A, serial number 25091 ONLY. PATS Aircraft LLC. Lists DH.125 Series 1A
- [STC SA1175EA](https://openairdocs.org/stc/SA1175EA): Installation of access doors. PATS Aircraft LLC. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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 ST01231CH-D](https://openairdocs.org/stc/ST01231CH-D): Installation of a Collins FCS-80 flight director system installed as a second system for use by copilot. ElectroSonics
- [STC SA756GL](https://openairdocs.org/stc/SA756GL): Modify radome, P/N 25RF9333A. Saint-Gobain Performance Plastics Corp. Lists DH.125 Series 1A
- [STC SA662NE](https://openairdocs.org/stc/SA662NE): Installation of a passenger Interior and Avionics. Bombardier Completion Center Inc
- [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. Lists DH.125 Series 1A
- [STC SA1147SW](https://openairdocs.org/stc/SA1147SW): Installation of main landing gear doors. Sierra Industries, Inc. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [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. Lists DH.125 Series 1A
- [STC SA1142WE](https://openairdocs.org/stc/SA1142WE): Installation of jump seat. CFC Aviation Services LP. Lists DH.125 Series 1A
- [STC SA1358WE](https://openairdocs.org/stc/SA1358WE): Installation of a combined airspeed and machmeter indicator. CFC Aviation Services LP. Lists DH.125 Series 1A

All 92: https://openairdocs.org/model/hawker-siddeley-dh-125-1a-522/stcs.md

## PMA parts (OpenAirDocs) (544, 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-125-1a-522/pma.md

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