# STC SH3744NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: WSH, LLC, United States
- Description: Dual Battery Installation
- Applied: April 13, 1987
- Status date: March 3, 2023
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3SO](https://openairdocs.org/tcds/H3SO), [TCDS H13WE](https://openairdocs.org/tcds/H13WE), [TCDS H3NM](https://openairdocs.org/tcds/H3NM), [TCDS R00012AT](https://openairdocs.org/tcds/R00012AT), [TCDS H1RM](https://openairdocs.org/tcds/H1RM), [TCDS H5SO](https://openairdocs.org/tcds/H5SO), [TCDS H6SO](https://openairdocs.org/tcds/H6SO), [TCDS H7SO](https://openairdocs.org/tcds/H7SO)
- Certificate PDF: https://openairdocs.org/files/sha256/f2/25/f225b7ec0f5f1e3618948fc20bb31d2cdd552f5206d2e2a074e9f1dd6cf128c8
- Approved model list and other attachments: [SH3744NM_AML.pdf](https://openairdocs.org/files/sha256/1b/73/1b732804f5d6eebf9dcf559b6cdbfdc4d79ca890f1ab5b5e9b3f47d33631df9c)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184946887420230324134230.0001
- DRS record last changed: August 31, 2026
- Page: https://openairdocs.org/stc/SH3744NM

## ADs that name it (0)

None.

## Approved models (9)

- International Helicopters Inc. UH-1B ([TCDS H5SO](https://openairdocs.org/tcds/H5SO))
- Overseas Aircraft Support Inc. UH-1B ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- Red Tail Flying Services LLC UH-1B ([TCDS R00012AT](https://openairdocs.org/tcds/R00012AT))
- Richards Heavylift Helo Inc. UH-1B ([TCDS H3SO](https://openairdocs.org/tcds/H3SO))
- Rotorcraft Development Corporation UH-1B ([TCDS H13WE](https://openairdocs.org/tcds/H13WE))
- Rotorcraft Development Corporation UH-1B ([TCDS H3NM](https://openairdocs.org/tcds/H3NM))
- Southwest Florida Aviation International SW204 (UH-1B) ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- Southwest Florida Aviation International SW204HP (UH-1B) ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- WSH LLC UH-1B ([TCDS H1RM](https://openairdocs.org/tcds/H1RM))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

**14 CFR 21.120)**

FAA Form 8110-2 (06/20) SUPERSEDES PREVIOUS EDITION PAGE 1 OF 2 Number: SH3744NM

This certificate issued to: WSH, LLC 3255 S. Bodenburg Loop Palmer, AK 99645

Dual Battery installation in accordance with San Joaquin Helicopter Top Drawing List No. SJH204-001, Revision “Initial Release”, dated December 30, 1990, or later FAA approved revision. WSH, LLC FAA approved Rotorcraft Operator’s Manual Supplement No. 1, Revision B, dated January 5, 2022, or later FAA approved revision to the Army Model UH-1B helicopter Rotorcraft operator’s manual is required with this installation.

This installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this change and any previously approved configuration will not introduce any adverse effect upon the airworthiness of that aircraft.

Date of application: April 13, 1987

Date of issuance: October 2, 1987 Date reissued: November 10, 2020, December 1, 2020

Date amended: May 7, 1991, March 3, 2023

August A. Asay Title: Manager, Anchorage ACO Branch Part * of Federal Aviation Regulations.

* See Approved Model List (AML) No.

SH3744NM, dated February 23, 2023, or later FAA approved revision, for aircraft makes and models, corresponding Type Certificate numbers, and applicable airworthiness regulations.

**14 CFR 21.120)**

FAA Form 8110-2 (06/20) SUPERSEDES PREVIOUS EDITION PAGE 2 OF 2

Number: SH3744NM

Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SH3744NM

### SH3744NM_AML.pdf

United States Of America Department of Transportation - Federal Aviation Administration

WSH, LLC Approved Model List (AML) 3255 S. Bodenburg Loop Number: SH3744NM Palmer, Alaska 99645 AML Revision: March 3, 2023

Approved Model List for the Installation of Dual Batteries

Page 1 of 1

**TCDS HOLDER MODEL TCDS**

NUMBER CERTIFICATION BASIS Rotorcraft Development Coporation UH-1B H13WE 14 CFR 21.25(a)(2) Rotorcraft Development Corporation UH-1B H3NM 14 CFR 21.25(a)(2) Red Tail Flying Services LLC UH-1B R00012AT 14 CFR 21.25(a)(2) WSH, LLC UH-1B H1RM 14 CFR 21.25(a)(2) Richards Heavylift Helo, Inc. UH-1B H3SO 14 CFR 21.25(a)(2) International Helicopters, Inc.

UH-1B H5SO 14 CFR 21.25(a)(2) Southwest Florida Aviation International SW204 (UH-1B) SW204HP (UH-1B) H6SO 14 CFR 21.25(a)(2) Overseas Aircraft Support, Inc.

UH-1B H7SO 14 CFR 21.25(a)(2)

## Every issue (2)

- March 3, 2023: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f2/25/f225b7ec0f5f1e3618948fc20bb31d2cdd552f5206d2e2a074e9f1dd6cf128c8), [SH3744NM_AML.pdf](https://openairdocs.org/files/sha256/1b/73/1b732804f5d6eebf9dcf559b6cdbfdc4d79ca890f1ab5b5e9b3f47d33631df9c)
- December 1, 2020: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e9/de/e9ded0f024b29fccd3c9b3dbc65cd05694e99ffd8b245a99569f7a25d90b5876)

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