# STC SH3512SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: RSG Products, United States
- Description: Installation of freon air conditioning system, electrically driven.
- Applied: June 25, 1985
- Status date: January 30, 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/sha256/43/71/4371911770927fec6dbd093e3f9676b419049292b09e407263755bd25aa915a7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/353E5469AC225DDA8625824900697787.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH3512SW

## ADs that name it (0)

None.

## Approved models (2)

- Bell Helicopter Textron 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 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: SH3512SW

Part 29 of the Federal Aviation Regulations.

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

Model: 412, 212 Description of Type Design Change:

Installation of freon air conditioning system, electrically driven, in accordance with Heli-Dyne Systems, Inc. Drawing List No. HD 412-70-0001, thru Rev. G dated 8/23/88, or later FAA approved revision.

FAA Approved Helicopter Flight Manual Supplement dated September 7, 1988 or later FAA approved revision is required;

Supplement dated September 26, 1985, or later FAA approved revision is required for Bell Model 412, Serial No. 33111 only.

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.

Date of Application: June 25, 1985 Date Reissued: March 21, 1990; January 30, 2017 Date of Issuance: September 26, 1985 Date Amended: 12/3/85, 7/25/88, 9/16/88 Revision 3

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: SH3512SW

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)

- January 30, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/43/71/4371911770927fec6dbd093e3f9676b419049292b09e407263755bd25aa915a7)

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