# STC SH3677SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: RSG Products, United States
- Description: Installation of Motorola Syntar 9000 FM Radios
- Applied: October 28, 1986
- Status date: March 3, 2017
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 29
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/84/3c/843c7ba31b73c871ef1a30f03183266cd92ec9b086f2c2e75556b97e3f267e24
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6D45D1BD59220DDD86258249006E6739.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH3677SW

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Inc. 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SH3677SW

Part 29 of the Federal Aviation Regulations.

Original Product – Type Certificate Number: H4SW Make: Bell Helicopter Textron, Inc.

Model: 412 Description of Type Design Change:

Installation of Motorola Syntar 9000 FM Radios in accordance with Heli-Dyne drawing HD412-00-0025 Rev. A dated October 30, 1986.

1. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

2. This installation is limited to B-412 S/N 33126 only.

Date of Application: October 28, 1986 Date Reissued: 3/21/90; 3/3/17 Date of Issuance: November 6, 1986 Date Amended:

Signature

Title James A. Grigg Manager, Fort Worth Aircraft Certification Office, Southwest Region RSG Products 3900 Falcon Way, Hangar 16S Fort Worth, TX 76106

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SH3677SW

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST10962SC

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (1)

- March 3, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/84/3c/843c7ba31b73c871ef1a30f03183266cd92ec9b086f2c2e75556b97e3f267e24)

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