# STCs that may be installed: N904AF A list on [N904AF](https://openairdocs.org/aircraft/N904AF.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. Page 1 of 2 · 59 STCs - [STC SR04464NY](https://openairdocs.org/stc/SR04464NY.md): Installation of the iPad Mount · Avio Design Group Inc. - [STC SR09027RC](https://openairdocs.org/stc/SR09027RC.md): Installation of a liquid oxygen system · MD Helicopters LLC - [STC SR00242DE-D](https://openairdocs.org/stc/SR00242DE-D.md): Installation of multipurpose cabin floor and seats · Air Methods LLC - [STC SR00243DE](https://openairdocs.org/stc/SR00243DE.md): Installation of articulating patient litter system for use in an EMS interior · Air Methods LLC - [STC SR00244DE](https://openairdocs.org/stc/SR00244DE.md): Installation of an aft equipment frame for use in an emergency medical interior. · Air Methods LLC - [STC SR00250DE-D](https://openairdocs.org/stc/SR00250DE-D.md): Installation of an EMS interior · Air Methods LLC - [STC SR04347CH](https://openairdocs.org/stc/SR04347CH.md): Installation of Heli-Preheat Kit, P/N TA3195-1 for 115-volt application · Hartzell Propeller LLC - [STC SR09028RC](https://openairdocs.org/stc/SR09028RC.md): Installation of boarding lights in accordance with Heli-Dyne drawing list HD900-00-0013, Rev. D, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR00134LA](https://openairdocs.org/stc/SR00134LA.md): Installation of Rescue Hoist Kit (600 lbs capacity). · MD Helicopters LLC - [STC SR00436WI-D](https://openairdocs.org/stc/SR00436WI-D.md): Installation of Bendix/King Avionics System and KFC 900 rotorcraft flight control system. · MD Helicopters LLC - [STC SR09019RC](https://openairdocs.org/stc/SR09019RC.md): Installation of high intensity lights in accordance with Heli-Dyne drawing list HD900-00-0001, Rev. D, dated August 28, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09020RC](https://openairdocs.org/stc/SR09020RC.md): Installation of EMS electric, inverter, air pump, and vacuum system in accordance with Heli-Dyne Master Drawing List HD900-00-0003, Revision D, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09021RC](https://openairdocs.org/stc/SR09021RC.md): Installation of Cabin Attendant Seats in accordance with Heli-Dyne Master Drawing List HD900-00-0004, Revision C, dated August 28, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09022RC](https://openairdocs.org/stc/SR09022RC.md): Installation of an aft medical cabinet in accordance with Heli-Dyne Master Drawing List HD900-00-0005, Revision IR, dated March 16, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09023RC](https://openairdocs.org/stc/SR09023RC.md): Installation of cabin hard interior panels in accordance with Heli-Dyne Master Drawing List HD900-00-0014, Revision A, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09025RC](https://openairdocs.org/stc/SR09025RC.md): Installation of a secondary litter in accordance with Heli-Dyne Master Drawing List HD900-00-0007, Revision A, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09026RC](https://openairdocs.org/stc/SR09026RC.md): Installation of an EMS floor covering in accordance with Heli-Dyne Master Drawing List HD900-00-0010, Revision B, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09029RC](https://openairdocs.org/stc/SR09029RC.md): Installation of an I.V. hook in accordance with Heli-Dyne Master Drawing List HD900-00-0006, Revision B, dated June 21, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09031RC](https://openairdocs.org/stc/SR09031RC.md): Installation of an Allied Signal EFIS-40 two tube electronic flight instrument system in accordance with Heli-Dyne drawing list HD900-00-0018, Rev. IR, dated May 22, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09040RC](https://openairdocs.org/stc/SR09040RC.md): Installation of an Observer/Attendant Seat, Blackout Curtain, and Pedal Cover in accordance with Heli-Dyne Master Drawing List HD900-00-0009, Revision D, dated August 28, 1995, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09073RC](https://openairdocs.org/stc/SR09073RC.md): Installation of high density seat track. · MD Helicopters LLC - [STC SR09151RC](https://openairdocs.org/stc/SR09151RC.md): Installation of an Allied Signal EFS-50 Four Tube Electronic Flight Instrument System (EFIS) for single pilot IFR operations in accordance with Heli-Dyne Drawing List, HD-900-00-0033, Revision IR, dated November 6, 1996, or later FAA approved revision. · MD Helicopters LLC - [STC SR09169RC](https://openairdocs.org/stc/SR09169RC.md): Installation of a Heli-Dyne Lucas fixed hoist · MD Helicopters LLC - [STC SR09170RC](https://openairdocs.org/stc/SR09170RC.md): Installation of a SX-16 Nightsun in accordance with Heli-Dyne Systems, Inc. drawing list HD900-00-0031, Revision -, dated 4-11-97, or later FAA approved revisions. · MD Helicopters LLC - [STC SR09212RC](https://openairdocs.org/stc/SR09212RC.md): Installation of Bear Paw Skis in accordance with drawings listed on Dart Master Drawing List (MDL) MDL-D900-619 Revision B, dated 03-04-99, or later FAA approved revision. · MD Helicopters LLC - [STC SR01019SE](https://openairdocs.org/stc/SR01019SE.md): Installation of the Enhanced Ground Proximity Warning System · Honeywell International Inc - [STC SR03463NY](https://openairdocs.org/stc/SR03463NY.md): Installation of Single Pilot Operation from L/H Seat Single Cockpit Door Removal · Brim Aviation - [STC SR02704SE](https://openairdocs.org/stc/SR02704SE.md): Installation and maintenance of the Sunspot 36 and 46 series lights · AeroLED's Holdings LLC - [STC SR00240WI-D](https://openairdocs.org/stc/SR00240WI-D.md): Installation of a Bendix/King VFR Utility Avionics Package (KCS 55A Compass System, KX 165 NavComm, KR 87 ADF, KRA 405 Radio Altimeter, Global Wulfsberg Flexcomm II, Artex Model 100 HM ELT, and Jet Model 510-22G Vertical Gyro · Honeywell International Inc - [STC SR00964CH](https://openairdocs.org/stc/SR00964CH.md): Install 28-gallon Fargo Manufacturing Co auxiliary fuel system in aft cabin baggage bay. · Fargo Manufacturing Co. - [STC SR01238CH](https://openairdocs.org/stc/SR01238CH.md): Install Fargo Manufacturing Auxiliary fuel system in aft cabin baggage bay. · Fargo Manufacturing Co. - [STC SR01813CH](https://openairdocs.org/stc/SR01813CH.md): Install Fargo Manufacturing Co. 52.5-gallon, crashworthy auxiliary fuel tank manufactured pursuant to STC SR01238CH, 55-gallon auxiliary fuel tank manufactured pursuant to STC SR505CH, or 28-gallon auxiliary fuel tank manufactured pursuant to STC SR000964CH on the aft cabin baggage bay floor of MD Helicopters, Inc. Model MD900 configured with MD Helicopters, Inc. 31-gallon, under baggage bay floor supplementary fuel tank · Fargo Manufacturing Co. - [STC SR01926CH](https://openairdocs.org/stc/SR01926CH.md): Installation of Fargo Manufacturing Co. 61.8-gallon, crashworthy auxiliary fuel on the aft cabin baggage bay floor. · Fargo Manufacturing Co. - [STC SR505CH](https://openairdocs.org/stc/SR505CH.md): Install Fargo auxiliary fuel system in aft cabin baggage bay. · Fargo Manufacturing Co. - [STC SR00359BO](https://openairdocs.org/stc/SR00359BO.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies - [STC SR09036RC](https://openairdocs.org/stc/SR09036RC.md): Installation of a sliding window in cabin sliding door. · The NORDAM Group LLC - [STC SR09165RC](https://openairdocs.org/stc/SR09165RC.md): Installation of a cockpit door sliding window. · The NORDAM Group LLC - [STC SR00903SE](https://openairdocs.org/stc/SR00903SE.md): Fabrication of Dart D900-619-011 Bearpaws in accordance with Dart Aerospace Drawing List No. MDL-D900-619, Revision E, dated April 5, 2001, or later Federal Aviation Administration (FAA) approved revision; and installation of this system · Dart Aerospace USA Inc. - [STC SR02526CH](https://openairdocs.org/stc/SR02526CH.md): Installation of an Inlet Barrier Filter (IBF) System · Donaldson Company Inc. - [STC SR09024RC](https://openairdocs.org/stc/SR09024RC.md): Installation of a litter carriage. · RSG Products - [STC SR02394AK](https://openairdocs.org/stc/SR02394AK.md): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system · Seaplanes North LLC - [STC SR00174NM](https://openairdocs.org/stc/SR00174NM.md): Installation of Vapor Cycle Air Conditioning system · Air Comm Corporation - [STC SR02232LA](https://openairdocs.org/stc/SR02232LA.md): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System · Garmin AT Inc. - [STC SR03895AT](https://openairdocs.org/stc/SR03895AT.md): Installation of a Lead Acid Battery as a replacement for the existing Nickel-Cadmium Battery. · Concorde Battery Corporation - [STC SR02050SE](https://openairdocs.org/stc/SR02050SE.md): Installation of a Supplemental Lighting System; manufactured and installed · Aviation Specialties Unlimited Inc. - [STC SR09527RC](https://openairdocs.org/stc/SR09527RC.md): Installation of Enhanced Vision System · Heritage Aviation Ltd - [STC SR00073LA](https://openairdocs.org/stc/SR00073LA.md): Installation of wire stroke protection system. · Bristol Aerospace Ltd - [STC SR09555RC](https://openairdocs.org/stc/SR09555RC.md): Installation of an EMS Interior. · Heritage Aviation Ltd - [STC SR09556RC](https://openairdocs.org/stc/SR09556RC.md): Installation of a Medical Oxygen System. · Heritage Aviation Ltd - [STC SR00243DE-D](https://openairdocs.org/stc/SR00243DE-D.md): Installation of an articulating patient litter system for use in an EMS interior · Air Methods Corporation Next page: https://openairdocs.org/aircraft/N904AF/stcs.md?page=2 ## 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 = '3030004' UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '52161') 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/N904AF/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.