# STCs approved under this data sheet: TCDS H6SO A list on [TCDS H6SO](https://openairdocs.org/tcds/H6SO.md). Current certificates first, most recently changed first. - [STC SR12332SE](https://openairdocs.org/stc/SR12332SE.md): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System · Mechanical Specialties, LLC - [STC SR02796SE](https://openairdocs.org/stc/SR02796SE.md): Installation of Human External Cargo (HEC) system · Boost Systems LLC - [STC SH8609SW](https://openairdocs.org/stc/SH8609SW.md): Fabrication of Isolair Eliminator II Model 4600-205 fire fighting system. · Isolair Inc. - [STC SR01776SE](https://openairdocs.org/stc/SR01776SE.md): Fabrication, installation, and maintenance of the Isolair Helicopters, Inc., Model 9002 High Cross tubes · Isolair Inc. - [STC SH3744NM](https://openairdocs.org/stc/SH3744NM.md): Dual Battery Installation · WSH, LLC - [STC SR00143DE](https://openairdocs.org/stc/SR00143DE.md): Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003 · Midwest Aerospace TC LLC - [STC SR09176RC](https://openairdocs.org/stc/SR09176RC.md): Modification of the vertical fin spar · Midwest Aerospace TC LLC - [STC SR09177RC](https://openairdocs.org/stc/SR09177RC.md): Modification of the vertical fin spar · Midwest Aerospace TC LLC - [STC SR09224RC](https://openairdocs.org/stc/SR09224RC.md): Modification of the lift beam on the Model UH-1H · Midwest Aerospace TC LLC - [STC SR02475SE](https://openairdocs.org/stc/SR02475SE.md): Installation of a Tailboom Motion Detection System · Aircraft Structural Repair Inc. - [STC SR02492LA](https://openairdocs.org/stc/SR02492LA.md): Installation of a Helicopter Technology Company main rotor blade assembly · Helicopter Technology Co - [STC SR02641SE](https://openairdocs.org/stc/SR02641SE.md): Installation of a Service Deck · Northwest Heli-Structures Inc - [STC SR02070SE](https://openairdocs.org/stc/SR02070SE.md): Fabrication of Dart D205-770-011 Replacement Engine Mount Kit · Dart Aerospace USA Inc. - [STC SR00929SE](https://openairdocs.org/stc/SR00929SE.md): Fabrication of tail boom mounted strakes. · BLR Aerospace LLC. - [STC SR01470SE](https://openairdocs.org/stc/SR01470SE.md): Fabrication and Installation of Fast Fin System. · BLR Aerospace LLC. - [STC SR03408CH](https://openairdocs.org/stc/SR03408CH.md): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103 · Airwolf Aerospace LLC - [STC SR02413LA](https://openairdocs.org/stc/SR02413LA.md): Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000 · AKV Inc. - [STC ST04270AT](https://openairdocs.org/stc/ST04270AT.md): Install the VTOL ASSALT V3 Windscreen Laminate Kit · VTOL LLC - [STC SR01196LA](https://openairdocs.org/stc/SR01196LA.md): Installation of Honeywell (Lycoming) T53-L-703 engine to replace Honeywell (Lycoming) T53-L-13/13B/-13BA engine. Responsible ACO is Los Angeles, NM-L. · Minuteman Aviation Inc. - [STC SR02051LA](https://openairdocs.org/stc/SR02051LA.md): Installation of a VAn Horn Aviation Tail Rotor Blade. · Van Horn Aviation LLC - [STC SR09257RC](https://openairdocs.org/stc/SR09257RC.md): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-800, Revision D, dated March 26, 2001, or later FAA approved revision. · Global Spar LLC - [STC SR09313RC](https://openairdocs.org/stc/SR09313RC.md): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-802, Revision B, dated April 5, 2001, or later FAA approved revision. · Global Spar LLC - [STC SR09316RC](https://openairdocs.org/stc/SR09316RC.md): Fabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-801, Revision B, dated April 5, 2001, or later FAA approved revision. · Global Spar LLC - [STC SR01812AT](https://openairdocs.org/stc/SR01812AT.md): Manufacture of Flitestep in accordance with Aeronautical Accessories, Inc. Drawing List Report No. AA-97166, no revision, dated December 19, 1997, or later FAA approved revisions, and installation per Aeronautical Accessories, Inc. Report AA-97087, Revision B, dated December 18, 1997, or later FAA approved revisions. · Bell Helicopter Textron Inc. - [STC SR01922AT](https://openairdocs.org/stc/SR01922AT.md): Manufacture of Locking Door Handle. · Bell Helicopter Textron Inc. - [STC SR01923AT](https://openairdocs.org/stc/SR01923AT.md): Manufacture of Air Deflector. · Bell Helicopter Textron Inc. - [STC SR01924AT](https://openairdocs.org/stc/SR01924AT.md): Manufacture of Low Skid or High Skid Landing Gear. · Bell Helicopter Textron Inc. - [STC SR01298NY](https://openairdocs.org/stc/SR01298NY.md): Installation of replacement crosstubes P/N D212-664. · Dart Aerospace Limited - [STC SR00563NY](https://openairdocs.org/stc/SR00563NY.md): Installation of Skidtubes and associated saddles · Dart Aerospace Limited - [STC SR01395NY](https://openairdocs.org/stc/SR01395NY.md): Installation of adjustable engine mount. · Dart Aerospace Limited - [STC SR01218AT](https://openairdocs.org/stc/SR01218AT.md): Manufacture of Flitestep. · Aeronautical Accessories, Inc. - [STC SH2621SO](https://openairdocs.org/stc/SH2621SO.md): Modification of main rotor blades P/N 204-011-250-5 or P/N 204-011-250-113 for restricted category. · Hill Mr. Jamie R. ## 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 = 'H6SO') ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/tcds/H6SO/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.