# STC SA4221SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation
- Description: Installation of S-TEC system 60 two axis automatic flight guidance system, Model ST-019
- Status date: June 3, 1981
- Data sheets: 3A12, 3A12
- Certificate PDF: https://openairdocs.org/files/sha256/19/f7/19f7c7d317ed4854217c88853d1829fdec6f305922a2f0f51ba7383ac74ff6e0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B47DFA0888F3C7D286257DF80079CEC7.0001
- Page: https://openairdocs.org/stc/SA4221SW

## ADs that name it

None.

## Approved models (2)

- Cessna Aircraft Company 172M (TCDS 3A12)
- Cessna Aircraft Company 172N (TCDS 3A12)

## 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.

United £tatu of amrriea Bepartment of transportation —federal Situation administration Supplemental ICgpe Certificate lAtwrrdw SA4221SU S-TEC Corporation Rt. 3, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 ,<^^/i«o«4^^/^^ <^^ 3 Civil Air r<x/iict Cessna 172M, 172N, S/N 17269309 and below installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Kodel ST-019 in accordance with Bulletin No. 122, Revision 2, dated 5/4/81 and Master Drawing List No. 9219, Revision B, dated V4/81 with optional Flight Director/Steering Horizon Installation according to ulletin No. 120, dated 6/2/80 and Master Drawing List No. 9209, dated 6/2/80 and optional Vertical Speed Indicator/Selector according to Bulletin No. 121, dated 6/2/80 and Master Drawing List No. 9210, dated 6/2/80, or later FAA approved revision. (14 Volt System)

1. FAA Approved Supplemental Flight Manual P/N 8917 dated 10-27-80 is required with S-TEC System 60 Two Axis Automatic Flight Control System Model ST-019.

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

October 14, 1980 October 27, 1980 <(«<!!^ June 3, 1981 Revision 1 (Signature) Don P. Watson Chief, Engineering and Manufacturing Branch

**FAAFOHM8I 10-2(10-68)**

## Every issue (1)

- June 3, 1981: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/19/f7/19f7c7d317ed4854217c88853d1829fdec6f305922a2f0f51ba7383ac74ff6e0)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.