FAA-listed STC holder

WSH, LLC STCs

The cited FAA DRS record snapshots list 7 selected supplemental type certificates with status Current under WSH, LLC. The records span 25 public aircraft directories and 4 modification categories. This is a research directory, not a claim that any specific kit or service is currently offered.

listed Current at snapshot

aircraft directories

modification categories

Jun 11, 2026

latest recorded revision

Recently revised records

Showing the 7 most recently revised records. Category directories provide the complete paginated discovery path.

7 displayed records.

Search every indexed record for this holder. The table below contains the recently revised records shown on this page.

WSH, LLC supplemental type certificates, aircraft applicability, source status and dates
STC and modification	Aircraft / model / TC	Source status and dates	Holder and authority
SR00252LA Installation of a Lycoming T53-L-13BA engine in a Western Int'l Aviation, Inc. helicopter. Limited to installation on UH-1P, S/N 63-13163 ONLY. Engine and powerplant View record	Bell Helicopter Textron UH-1PTC H12NM	Current at cited snapshot Revised Jun 11, 2026 Application: Nov 24, 1995	FAA holder: WSH, LLC 3255 S. Bodenburg Loop Palmer, AK 99645 FAA authority record
SR01349LA Installation of Honeywell (Lycoming) T53-L-13B/-13BA engine to replace General Electric T58-GE-3 engine or T53-L-703 engine to replace Honeywell (Lycoming) T53-L-13B/-13BA engine. Engine and powerplant View record	Rotorcraft Development TH-1FTC H12NM Rotorcraft Development UH-1FTC H12NM Rotorcraft Development UH-1PTC H12NM Tamarack Helicopters TH-1FTC H7NE Tamarack Helicopters UH-1FTC H7NE	Current at cited snapshot Revised Jun 11, 2026 Application: Mar 29, 2002	FAA holder: WSH, LLC 3255 S. Bodenburg Loop Palmer, AK 99645 FAA authority record
SR02491AK Reduction / Limitation of passenger seats to nine (9) or less. Other aircraft modifications View record	Bell Helicopter Textron 214BTC H6SW Bell Helicopter Textron 214B-1TC H6SW	Current at cited snapshot Revised Aug 17, 2023 Application: Jun 22, 2017	FAA holder: WSH, LLC 3255 S. Bodenburg Loop, Palmer, Alaska 99645 FAA authority record
SH3744NM Dual Battery Installation. Electrical systems View record	Richards Heavylift Helo UH-1BTC H3SO Rotorcraft Development UH-1BTC H13WE Red Tail Flying Services UH-1BTC R00012AT WSH UH-1BTC H1RM International Helicopters UH-1BTC H5SO Southwest Florida Aviation International SW204 (UH-1B)TC H6SO Southwest Florida Aviation International SW204HP (UH-1B)TC H6SO Overseas Aircraft Support UH-1BTC H7SO	Current at cited snapshot Revised Mar 3, 2023 Application: Apr 13, 1987	FAA holder: WSH, LLC 3255 S. Bodenburg Loop, Palmer, AK 99645, United States FAA authority record
SH1415NM Installation of a Perkins Plastics part no 3180-20 bubble window in the right hand door. Aircraft structures View record	Airbus Helicopters SA.315B Alouette IIITC H1IN	Current at cited snapshot Revised Oct 21, 2022 Application: Oct 21, 1981	FAA holder: WSH, LLC 3255 S. Bodenburg LP, Palmer, AK 99645 FAA authority record
SH400NW Installation of left hand bubble door with or without duplicate engine instruments. Engine and powerplant View record	Bell Textron 204BTC H1SW Bell Textron 205A-1TC H1SW Bell Textron 212TC H4SW Erickson 214 Holdings 214BTC H6SW Erickson 214 Holdings 214B-1TC H6SW	Current at cited snapshot Revised Oct 21, 2022 Application: Aug 11, 1975	FAA holder: WSH, LLC 3255 S. Bodenburg LP. Palmer, Alaska 99645 FAA authority record
SH5690NM Installation of Advanced Technology Aircraft Co. engine barrier filter. Engine and powerplant View record	Bell Helicopter Textron 204BTC H1SW Bell Helicopter Textron UH-1ETC H4NM International Helicopters UH-1BTC H5SO Overseas Aircraft Support UH-1ETC H7SO Richards Heavylift Helo UH-1BTC H3SO Rotorcraft Development UH-1BTC H13WE Rotorcraft Development UH-1ETC H5NM San Joaquin Helicopters UH-1BTC H1RM Smith Helicopters UH-1ETC H8NM West Coast Fabrications UH-1ETC H9NM	Current at cited snapshot Revised Feb 5, 2022 Application: Aug 13, 1991	FAA holder: WSH, LLC 3255 S. Bodenburg Loop, Palmer, AK 99645, United States FAA authority record

WSH, LLC STCs

Modification mix

Aircraft represented

Recently revised records

Installation of a Lycoming T53-L-13BA engine in a Western Int'l Aviation, Inc. helicopter. Limited to installation on UH-1P, S/N 63-13163 ONLY.

Installation of Honeywell (Lycoming) T53-L-13B/-13BA engine to replace General Electric T58-GE-3 engine or T53-L-703 engine to replace Honeywell (Lycoming) T53-L-13B/-13BA engine.

Reduction / Limitation of passenger seats to nine (9) or less.

Dual Battery Installation.

Installation of a Perkins Plastics part no 3180-20 bubble window in the right hand door.

Installation of left hand bubble door with or without duplicate engine instruments.

Installation of Advanced Technology Aircraft Co. engine barrier filter.