# STCs that may be installed: N891CS A list on [N891CS](https://openairdocs.org/aircraft/N891CS.md). Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do. In force first, then newest. - [STC SR12474NY](https://openairdocs.org/stc/SR12474NY.md): Installation of replacement windows · Tech-Tool Plastics, Inc. - [STC ST00885LA](https://openairdocs.org/stc/ST00885LA.md): Installation of fire extinguisher cartridges as replacements for Pacific Scientific fire extinguisher cartridges in fire extinguisher bottles. · AMETEK AMERON, LLC d/b/a MASS Systems - [STC SR11844CH](https://openairdocs.org/stc/SR11844CH.md): Installation of Heli-Preheat Kit, p/n TA3391-1 for 115 volt application · Hartzell Propeller LLC - [STC SR04464NY](https://openairdocs.org/stc/SR04464NY.md): Installation of the iPad Mount · Avio Design Group Inc. - [STC SR00521SE](https://openairdocs.org/stc/SR00521SE.md): Installation of Geneva Aviation Audio System · AEM USA Inc. - [STC SR00202IB](https://openairdocs.org/stc/SR00202IB.md): Installation of Emergency Medical Services (EMS) Equipment, either P/N 135-0238317-501 or P/N 135-0238317-502 · AEROLITE AG - [STC SR12092IB](https://openairdocs.org/stc/SR12092IB.md): Manufacturing and Installation of Cargo Hold Nets · ICARUS AERO INC. - [STC SR12065DE](https://openairdocs.org/stc/SR12065DE.md): Installation of Honeywell 5G Bandpass Filter into existing KRA 405B Radar Altimeter Systems · QAI Aviation Inc. - [STC SR04842NY](https://openairdocs.org/stc/SR04842NY.md): Installation of RMCI Inc. Expandable Rotorcraft Diagnostic System (XRDS) · Sterling Helicopter - [STC SR04711NY](https://openairdocs.org/stc/SR04711NY.md): Replacement of Luminator LS400 LED searchlight (steerable landing light) · Sterling Helicopter - [STC SR11343DS](https://openairdocs.org/stc/SR11343DS.md): Installation of TDFM-9000 Communication System · Airbus Helicopters Inc. - [STC SR11857IB](https://openairdocs.org/stc/SR11857IB.md): Installation of SkyTrac ISAT-200A Flight Following / Satcom System · SkyTrac Systems Ltd. - [STC SR01790SE](https://openairdocs.org/stc/SR01790SE.md): Installation of Skidtube and Skidtube extension · Dart Aerospace USA Inc. - [STC SR00182IB](https://openairdocs.org/stc/SR00182IB.md): Installation of the Avidyne Integrated Flight Display (IFD) Navigator(s) · Horizon Design Services Ltd. - [STC SR03704NY](https://openairdocs.org/stc/SR03704NY.md): Installation of Air Ambulance Technology GmbH's P/N 135-25-20-5000-600 Series Air Ambulance Equipment (EMS config) or P/N 135-25-20-5000-900 Series VIP Interior (VIP config) · Air Ambulance Technology GmbH - [STC SH3319NM](https://openairdocs.org/stc/SH3319NM.md): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system, · Precise Flight Inc - [STC SR00368BO](https://openairdocs.org/stc/SR00368BO.md): Installation of an Outerlink SATCOM Communications and Flight Data Monitoring System KIT 135-SAT-100 · Outerlink Corporation - [STC SR02217SE](https://openairdocs.org/stc/SR02217SE.md): Fabrication of Onboard Systems Single-Hook and Double-Hook Cargo Hook Kit · Onboard Systems - [STC SR09559RC](https://openairdocs.org/stc/SR09559RC.md): Installation of Night Vision Goggle Compatible Interior Lighting System · REB Technologies Inc. - [STC SR09105RC-D](https://openairdocs.org/stc/SR09105RC-D.md): Installation of a Concorde RG-390E or RG-380E/44 Lead Acid Battery · Airbus Helicopters Inc. - [STC SR09919AC](https://openairdocs.org/stc/SR09919AC.md): Installation of a Luminator search light LS-400, LS-400M, or LS-400T · Luminator Holdings L.P. - [STC SR02138LA](https://openairdocs.org/stc/SR02138LA.md): Installation of Utility Step Mount · Airfilm Camera Systems - [STC SR02704SE](https://openairdocs.org/stc/SR02704SE.md): Installation and maintenance of the Sunspot 36 and 46 series lights · AeroLED's Holdings LLC - [STC SR02114NY-D](https://openairdocs.org/stc/SR02114NY-D.md): Installation of a Honeywell Chadwick Model 15175 VXP System · Diagnostic Solution International LLC - [STC SR02677SE](https://openairdocs.org/stc/SR02677SE.md): Installation of Heavy Duty Wearplates · Dart Aerospace USA Inc. - [STC SR09164RC](https://openairdocs.org/stc/SR09164RC.md): Installation of an Airborne Emergency Medical Systems. · Metro Aviation Inc - [STC SR09354RC](https://openairdocs.org/stc/SR09354RC.md): Installation of Metro Aviation optional equipment. · Metro Aviation Inc - [STC SR09193RC](https://openairdocs.org/stc/SR09193RC.md): Installation of a window in the aft clamshell doors · Metro Aviation Inc - [STC SA00339BO](https://openairdocs.org/stc/SA00339BO.md): Installation of Single pilot IFR KIT135M-GTN-150 with Garmin GTN 650-750 WAAS Navigators · Metro Aviation Inc - [STC SR00821DE](https://openairdocs.org/stc/SR00821DE.md): Installation of Automatic Dependent Surveillance - Broadcast (ADS-B) Out and in functionality using the BendixKing KT74 Transponder and qualified position sensor and ADS-B In Receiver · Peregrine - [STC SR04276NY](https://openairdocs.org/stc/SR04276NY.md): Installation of the Crosstubes · Dart Aerospace Limited - [STC SR01042SE](https://openairdocs.org/stc/SR01042SE.md): Fabrication of Dart D135-692-011 Bearpaws · Dart Aerospace USA, Inc. - [STC SR04235NY](https://openairdocs.org/stc/SR04235NY.md): Installation of Garmin GTS Traffic System · Maxcraft Avionics Ltd. - [STC SR04228NY](https://openairdocs.org/stc/SR04228NY.md): Installation of Garmin HTAWS (Helicopter Terrain Awareness Warning System) · Maxcraft Avionics Ltd. - [STC SR09104RC-D](https://openairdocs.org/stc/SR09104RC-D.md): Installation of pulsed engine and gearbox chip detector system. · Airbus Helicopters Inc. - [STC SR03949NY](https://openairdocs.org/stc/SR03949NY.md): Installation of Removable Pins for Hinged Door · Airbus Helicopters Canada Limited - [STC SR01855LA](https://openairdocs.org/stc/SR01855LA.md): Installation of Apical Industries, Inc. Emergency Float Kit · Apical Industries, Inc. dba Dart Aerospace - [STC SR02307LA](https://openairdocs.org/stc/SR02307LA.md): Installation of Apical Industries, Inc. Cable Cutters Kit. · Apical Industries, Inc. dba Dart Aerospace - [STC SR03277NY](https://openairdocs.org/stc/SR03277NY.md): Installation of a HELICOM V2 NUM System for tracking a set of flight and system parameters during operation of the rotorcraft · ISEI, Le Mercure B - [STC SR02478AK](https://openairdocs.org/stc/SR02478AK.md): Installation of the L-3 Aviation Products Lynx multilink surveillance system model NGT-9000() part number 9029000-20000 or Garmin GTX-345 ADS-B transponder part number 011-03302-40 · Vector Aerospace Helicopter Services USA Inc. - [STC SR01207SE](https://openairdocs.org/stc/SR01207SE.md): Installation of a Supplemental Lighting System · Aviation Specialties Unlimited Inc. - [STC SR09163RC](https://openairdocs.org/stc/SR09163RC.md): Installation of a mechanically driven vapor-cycle air conditioning system. · Metro Aviation Inc - [STC SR01139DE](https://openairdocs.org/stc/SR01139DE.md): Installation of a GPMS Foresight MX Condition Monitoring System · GPMS International Inc. ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT m.matched_by, s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model FROM ( SELECT stc_number, min(side) AS side, arg_min(matched_by, side) AS matched_by, arg_min(matched_model, side) AS matched_model FROM (SELECT stc_number, 1 AS side, 'airframe' AS matched_by, matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code = '5620040' UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '52135') GROUP BY stc_number ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number) ORDER BY m.side, s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/aircraft/N891CS/stcs --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.