# STC SA04197CH - Type: Supplemental type certificate - Status: Current, Issued - Holder: The STC Group, LLC., United States - Description: Installation of structural provisions for an avionics (autopilot) upgrade - Applied: November 21, 2016 - Status date: March 29, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A13](https://openairdocs.org/tcds/3A13) - Certificate PDF: https://openairdocs.org/files/sha256/e4/ac/e4accd70e09f56defd8df79f2802ee5511b759a21d83619f2a07a2cc2ea092f7 - Approved model list and other attachments: [SA04197CH_AML.pdf](https://openairdocs.org/files/sha256/41/41/4141e0f12fbaef1569a4077e83d05105b7227b78713302242604e324166b3625) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC401A13CE545D6C8625810900512811.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA04197CH ## ADs that name it (0) None. ## Approved models (39) - Textron Aviation Inc. 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172R ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182A ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182B ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182D ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182E ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182F ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182G ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182H ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182J ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182K ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182L ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182M ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182N ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182P ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182Q ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182R ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182S ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182T ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. R182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. T182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. T182T ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. TR182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) ## 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. Installation of structural provisions for an avionics (autopilot) upgrade per installation instructions listed on FAA Approved Models List number SA04197CH. 1. This approval is authorization for installation of the autopilot provisions documented in the installation instructions refer enced on FAA Approved Models List SA04197CH. It does not grant approval for installation or activation of an operational autopilot system. 2. This alteration has been approved on a noninterference basis, therefore not been evaluated to check its proper operations for its intended function. 3. Compatibility of the design change with previously approved modifications must be determined by the installer. 4. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. …End… The STC Group, LLC. 480 Ruddiman Drive Muskegon, MI 49445 * (see attached FAA Approved Model List (AML) No. SA04197CH for list of Approved models and applicable airworthiness regulations) Timothy P. Smyth (Signature) Manager Chicago Aircraft Certification Office (Title) November 21, 2016 March 29, 2017 (Continued): ### SA04197CH_AML.pdf **FAA APPROVED MODEL LIST (AML) NO. SA04197CH THE STC GROUP, LLC.** FOR **INSTALLATION OF STRUCTURAL PROVISIONS FOR AN AVIONICS (AUTOPILOT) UPGRADE** ISSUE DATE: March 29, 2017 **ITEM** **AIRCRAFT** **AIRCRAFT** **ORIGINAL TYPE** **CERTIFICATION BASIS** **INSTALLATION** **INSTRUCTIONS** AFM AML **MAKE MODEL CERTIFICATE NUMBER FOR** **ALTERATION** **NUMBER** **REVISION NO. & DATE** **SUPPLEMENT** **NUMBER/DATE** **AMENDMENT DATE** Page 1 of 1 1 Textron Aviation Inc. 172, 172I 172A, 172K 172B, 172L 172C, 172M 172D, 172N 172E, 172P 172F (USAF T-41A) 172Q, 172G 172R 172H (USAF T-41A) 3A12 As listed in TCDS 3A12 STC Group Document TRIO Autopilot Installation Instructions Report Number 1006102 Revision 1, Dated March 10, 2017 or later FAA approved revision. N/A March 29, 2017 2 Textron Aviation Inc. 182, 182K 182A, 182L 182B, 182M 182C, 182N 182D, 182P 182E, 182Q 182F, 182R 182G, R182 182H, T182 182J, TR182 182S, T182T 182T 3A13 As listed in TCDS 3A13 STC Group Document TRIO Autopilot Installation Instructions Report Number G-1006-41 Revision A, Dated March 13, 2017 or later FAA approved revision. N/A March 29, 2017 FAA APPROVED: Timothy P. Smyth Manager Chicago Aircraft Certification Office Issued: March 29, 2017 (pages 1 of 1) ## Every issue (1) - March 29, 2017: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e4/ac/e4accd70e09f56defd8df79f2802ee5511b759a21d83619f2a07a2cc2ea092f7), [SA04197CH_AML.pdf](https://openairdocs.org/files/sha256/41/41/4141e0f12fbaef1569a4077e83d05105b7227b78713302242604e324166b3625) --- 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.