# STC SA3-576

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aircraft Development Co, United States
- Description: Installation of speed kit.
- Applied: September 18, 1960
- Status date: January 30, 1996
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17)
- Certificate PDF: https://openairdocs.org/files/sha256/0d/63/0d632f6df57be95f01876cff9c84dcd1fa80b1397e574ed2812dfea392ba85d6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/725B7086819A59DC8625802800735E30.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-576

## ADs that name it (0)

None.

## Approved models (5)

- The Cessna Aircraft Company 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- The Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- The Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17))

## 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 5A3-576 This certificate issued to: Aircraft Development Co.

1220 Red Oak Ct.

Troy, MO 63379 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airorthiness requirement's of Part 3 of the Civil Air Poegulations.

Original Product - Type Certificate Number: 3A12 and 3A17 Cessna Model: 172, 172A, 172B, 175, 175A Description of Type Design Change: Speed kit for Cessna Model 172 and 175 aircraft per R & E Aircraft Parts List No. 172-100, and Installation Instructions 128 (10 sheets), both dated April 1, 1960, revised October 26, 1960.

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer.

Date of Application: September 18, 1960 Date Reissued: May 29, 1981; January 21, Date of Issuance: November 21, 1960 1993; January 30, 1996 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Ronald K. Ratkgeker Ronald K. Rathgeber TOMINSTRATT Wichita Aircraft Certification office Asso. ACO Mgr. Airframe & Services (Title)

## Every issue (1)

- January 30, 1996: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0d/63/0d632f6df57be95f01876cff9c84dcd1fa80b1397e574ed2812dfea392ba85d6)

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