# STC SA09216AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT altitude hold system, Model ST-673.
- Applied: May 12, 1997
- Status date: May 16, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4EU](https://openairdocs.org/tcds/A4EU)
- Certificate PDF: https://openairdocs.org/files/sha256/03/d3/03d31c19f59a16d2381912a1a4ce09bf369d4f4283cf09959ef7f56529416ea7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A76106082B5A44F885256CC1007F3A1D.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09216AC-D

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company F172M ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))
- Cessna Aircraft Company F172N ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))
- Cessna Aircraft Company F172P ([TCDS A4EU](https://openairdocs.org/tcds/A4EU))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A09216AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the Civil I in Regulations.

Original Product I ype Certificate Number: A4EU Make: Reims Aviation S.A. Cessna Model: F172M, F172N, and F172P Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-673, according to Bulletin No. 773, dated 5-09-97 and Master Drawing List No. 92991, dated 5-09-97 or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on the above Models When Modified By 180 H.P. Engine Conversion.

(See Continuation Sheet, Page 2, a part of this STC.)

Date of Application: 5-12-97 Date Reissued:

Date of Issuance: 5-16-97 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Ween Hom TOMINISTRATOS William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09216 AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Supplemental Flight Manual, P/N 891378, dated 5-16-97 is required for Reims Aviation S.A. Models Cessna F172M, F172N, and F172P And These Models When Modified By 180 H.P. Engine Conversion or later FAA Approved revisions of the above supplement.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

FAA Form 8110-2-1(10-69) Page 2 of 2

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and 2IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- May 16, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/03/d3/03d31c19f59a16d2381912a1a4ce09bf369d4f4283cf09959ef7f56529416ea7)

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