# STCs approved under this data sheet: TCDS 1H4 A list on [TCDS 1H4](https://openairdocs.org/tcds/1H4.md). Current certificates first, most recently changed first. - [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 SA4-181](https://openairdocs.org/stc/SA4-181.md): Installation of VIP Part No. 101-79 engine mounts. · FTG, Inc. - [STC SR02704SE](https://openairdocs.org/stc/SR02704SE.md): Installation and maintenance of the Sunspot 36 and 46 series lights · AeroLED's Holdings LLC - [STC SA02268CH](https://openairdocs.org/stc/SA02268CH.md): Installation of Airwolf Filter Corp. Air Oil Separator · Airwolf Filter Corporation - [STC SR00359BO](https://openairdocs.org/stc/SR00359BO.md): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. · Whelen Aerospace Technologies - [STC SA01282NY](https://openairdocs.org/stc/SA01282NY.md): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. · Airwolf Filter Corporation - [STC SR02562CH](https://openairdocs.org/stc/SR02562CH.md): Installation of C&D Associates Combustion Heater Kit 28 (P/N CD14190K28) · Hartzell Engine Technologies, LLC - [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 SR09229RC](https://openairdocs.org/stc/SR09229RC.md): Installation approval of a 5 blade main rotor system and the Air Research TSE331-10UA-511SW engine · Whisper Jet Inc. - [STC SA2693NM](https://openairdocs.org/stc/SA2693NM.md): Installation of Electronics International digital volt/amp gauges and accessories. · Electronics International Inc. - [STC SH51WE](https://openairdocs.org/stc/SH51WE.md): Installation of George M. Adams Model DGA-2000 wheel assembly. · Skybound Manufacturing Inc. - [STC SR01034AT](https://openairdocs.org/stc/SR01034AT.md): Installation of forward and aft facing seats and cabin interior. · Whisper Jet, Inc. - [STC SR01274AT](https://openairdocs.org/stc/SR01274AT.md): Installation of cabin doors and windows. · Whisper Jet, Inc. - [STC SH127WE](https://openairdocs.org/stc/SH127WE.md): Installation of AiResearch TSE-331-3U-303N engine and related changes. · Whisper Jet Inc. - [STC SR09190RC](https://openairdocs.org/stc/SR09190RC.md): Installation of a National Flight Services TSE331-10UA-511SW turbine conversion. · Orlando Aviation, Inc - [STC SR09041RC](https://openairdocs.org/stc/SR09041RC.md): Installation of a fuselage left cabin door. · Federico Helicopters Inc. - [STC SA1626NM PAGE 2](https://openairdocs.org/stc/SA1626NM%20PAGE%202.md): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series) · Electronics International - [STC SH770NW](https://openairdocs.org/stc/SH770NW.md): Installation of a weighing system. · Onboard Systems - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM.md): Installation of Electronics Int'l digital automatic engine analyzer. · Electronics International - [STC SH150WE](https://openairdocs.org/stc/SH150WE.md): Installation of Chadwick electronic weighing system C-46. · Onboard Systems - [STC SH4-181](https://openairdocs.org/stc/SH4-181.md): Installation of VIP P/N 101-79 mounts. · Vibration Isolation Products Corp - [STC SH1775SO](https://openairdocs.org/stc/SH1775SO.md): Installation of Wright R-1300-3 engine. · Orlando Heli Airways Inc - [STC SH1599SO](https://openairdocs.org/stc/SH1599SO.md): Removal of main transmission oil cooler blower and associated parts. · Orlando Heli Airways Inc - [STC SH1523SO](https://openairdocs.org/stc/SH1523SO.md): Add approved fuels: unleaded automotive gasoline 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON & MON)/2. Intermixing with aviation gasoline also approved. · Orlando Heli Airways Inc - [STC SH449NW](https://openairdocs.org/stc/SH449NW.md): Installation of an electronic weighing system (for monitoring cargo weight) · Measurement Systems Intl - [STC SH271WE](https://openairdocs.org/stc/SH271WE.md): Installation of cabin-mounted spray tank and external spray booms for agricultural purposes. · Helitec Corporation - [STC SH1072SO](https://openairdocs.org/stc/SH1072SO.md): Installation of dust boot retainer rings (in rotor head dampers). · Orlando Heli Airways Inc - [STC SH125WE](https://openairdocs.org/stc/SH125WE.md): Installation of AiResearch TSE-331-3U-303N engine and related changes. (Limited to serial number 55607). · Aviation Specialties, Inc - [STC SH71EA](https://openairdocs.org/stc/SH71EA.md): South Wind heater 8259-A. · Laboratory for Electronics Inc ## 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 FROM 'https://openairdocs.org/data/latest/faa_stc.parquet' s WHERE s.stc_number IN (SELECT stc_number FROM 'https://openairdocs.org/data/latest/faa_stc_model.parquet' WHERE tcds_number = '1H4') ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/tcds/1H4/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.