# STCs that may be installed: Raytheon HS125-400B

A list on [Raytheon HS125-400B](https://openairdocs.org/model/raytheon-hs125-400b.md).

In force first, then newest. The registry doesn’t record which STCs an aircraft has.

- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT.md): Installation of an Avionica, Inc. avCM Cellular Module · Aircraft Systems and Manufacturing Inc.
- [STC ST02472AT](https://openairdocs.org/stc/ST02472AT.md): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII · Aircraft Systems and Manufacturing Inc.
- [STC ST01084WI](https://openairdocs.org/stc/ST01084WI.md): Installation of Collins TCAS-4000 TCAS II System (with or without optional Avidyne Flight Max 800 MDF). · Blackhawk Aerospace Technologies Inc.
- [STC ST01085WI](https://openairdocs.org/stc/ST01085WI.md): Installation of Honeywell MK VIII Enhanced Ground Proximity Warning System (EGPWS) (with/without optional Avidyne Flight Max 800 MFD). · Blackhawk Aerospace Technologies Inc.
- [STC ST04177AT](https://openairdocs.org/stc/ST04177AT.md): Installation of a Talon Aerospace LED Replacement General Purpose Lamps · Aaxico Technical Services Inc.
- [STC ST02068CH](https://openairdocs.org/stc/ST02068CH.md): Install air ambulance conversion · Spectrum Aeromed LLC dba Spectrum Aeromed
- [STC ST11071SC](https://openairdocs.org/stc/ST11071SC.md): 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 ST01228WI](https://openairdocs.org/stc/ST01228WI.md): Replacement of OEM window pane assemblies with Lee Aerospace laminated window assembly and termination of OEM dry air system · Lee Aerospace, Inc.
- [STC ST03776NY](https://openairdocs.org/stc/ST03776NY.md): 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) · Scandinavian Avionics Design ApS
- [STC ST01560CH](https://openairdocs.org/stc/ST01560CH.md): Install Aero Medical Products Mfg., Inc. Air Ambulance Stretcher P/N 125 using Installation Kit P/N 805. · Paul/ Lanna Egan LLC
- [STC ST01809LA](https://openairdocs.org/stc/ST01809LA.md): Installation of Hawker PN 9750W0640 Sealed Lead Acid Battery. · Securaplane Technologies
- [STC ST01380LA](https://openairdocs.org/stc/ST01380LA.md): Installation of Diamond J, Inc. Engine Indicators N1, N2, and ITT. · Gulfstream-California Inc.
- [STC ST01486SE-D](https://openairdocs.org/stc/ST01486SE-D.md): Group aircraft approval for Reduced Vertical Separation Minimum (RVSM). · AeroMech Incorporated
- [STC ST01623SE](https://openairdocs.org/stc/ST01623SE.md): Installation of Innovative Solutions and Support (IS&S) Air Data Display Units · AeroMech Incorporated
- [STC ST01003CH-D](https://openairdocs.org/stc/ST01003CH-D.md): Installation of AlliedSignal Aerospace N1 digital electronic engine control (DEEC). · Honeywell International Inc
- [STC ST456CH-D](https://openairdocs.org/stc/ST456CH-D.md): Installation of AlliedSignal Aerospace TFE731-3D-1H or TFE731-3DR-1H Turbofan Engine(s). · Honeywell International Inc
- [STC ST01394WI-D](https://openairdocs.org/stc/ST01394WI-D.md): Modification of a Collins CTL-23 or CTL-23C VHF COMM/NAV Control Panel System installation. · Rockwell Collins Inc
- [STC ST02171CH](https://openairdocs.org/stc/ST02171CH.md): Installation of dual Innovative Solutions and Support Air Data Display Uits and dual Analog Interface Units. · Envoy Aerospace LLC
- [STC ST01223WI](https://openairdocs.org/stc/ST01223WI.md): 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 SA1185SO](https://openairdocs.org/stc/SA1185SO.md): Replace existing batteries with 2371, 2376 or 23491 nickel-cadmium batteries. · Aviall Services, Inc.
- [STC ST1003SO](https://openairdocs.org/stc/ST1003SO.md): 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 ST01324LA](https://openairdocs.org/stc/ST01324LA.md): Installation of Garrett Aviation auxiliary electrical hydraulic system. · AiResearch Aivation Service Co
- [STC SA858WE](https://openairdocs.org/stc/SA858WE.md): Environmental control system. · GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services · Lists 125 Series
- [STC SA860WE](https://openairdocs.org/stc/SA860WE.md): Installation of pressurization control system. · GE Engine Services-Corporate Aviation Inc. DBA Garrett Aviation Services · Lists 125 Series
- [STC SA1184SO](https://openairdocs.org/stc/SA1184SO.md): Replace existing batteries with the SAFT 2371-5 series nickel- cadmium batteries. · SAFT America Inc · Lists HS.125 Series
- [STC ST00069NY](https://openairdocs.org/stc/ST00069NY.md): Installation of Loral/Fairchild F1000 digital flight data recorder. · Innotech Aviation · Lists HS.125 Series
- [STC SA36NW](https://openairdocs.org/stc/SA36NW.md): Installation of Sundstrand Ground Proximity Warning System · Sundstrand Data Control Inc
- [STC ST01486SE](https://openairdocs.org/stc/ST01486SE.md): Group aircraft approval for Reduced Vertical Separation Minimum (RVSM). · AeroMech Incorporated

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
  SELECT stc_number, min(matched_model) AS matched_model
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet'
  WHERE aircraft_model_code IN ('7150018')
  GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number
```

This list as a web page: https://openairdocs.org/model/raytheon-hs125-400b/stcs

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