# STC SA09420AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 20/30 single and two axis automatic flight guidance systems, model ST-869-20/30.
- Applied: October 21, 1999
- Status date: October 25, 1999
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A23EU](https://openairdocs.org/tcds/A23EU)
- Certificate PDF: https://openairdocs.org/files/sha256/6c/ef/6cefd1b222f364ed9e558311aad9be256d3df206f21a5ac7cd38c2ddf4bdbeb6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FBC1F3FA8C75141585256CC1007F3AF1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09420AC-D

## ADs that name it (0)

None.

## Approved models (8)

- Cessna Aircraft Company F337E ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company F337F ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company F337G ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company F337H ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company FT337E ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company FT337F ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company FT337GP ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))
- Cessna Aircraft Company FT337HP ([TCDS A23EU](https://openairdocs.org/tcds/A23EU))

## 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: SA09420AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the felloring product with the lisitations and conditions therefor as specified heron meets the aiworthiness requiements of Fart 2i of the Folent d rintion Regulations.

Original Product I ype Certificate A umter: A23EU Make: Reims Aviation S.A. Models Cessna Model: F337E, FT337E, F337F, FT337F, F337G, FT337GP, F337H, and FT337HP Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-869-20/30, according to Bulletin No. 969, dated 10-20-99 and Master Drawing List No. 921165, dated 10-20-99 or later FAA Approved revisions of the above data (28 Volt System).

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

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.

Date of Application: 10-21-99 Date veined:

Date of Issuance: 10-25-99 Date Amended:

By Direction of the Administrator FEDERAL AVIATION mall Ki (Signature) TOMINSTRATIO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

FÃN Form 8110~2(10-68) Page I of 2 This certificate may be transferred in accordance with FAR 21.17.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09420 AC-D Limitations and Conditions: (con't.)

Also eligible on the above models when modified per STC SA937CE (Horton STOL Craft conversion).

Also eligible on the above models when modified per STC SA1627WE (Robertson STOL conversion).

FAA/DAS Approved Supplemental Flight Manual, P/N 891895, dated 10-25-99 is required for Reims Aviation S.A. Models Cessna F337E, FT337E, F337F, FT337F, F337G, FT337GP, F337H, and FT337HP and the above models when modified per STC SA937CE (Horton STOL Craft conversion) for S-TEC System 20 or later FAA Approved revisions of the above supplement.

4. FAA/DAS Approved Supplemental Flight Manual, P/N 891896, dated 10-25-99 is required for Reims Aviation S.A. Models Cessna F337E, FT337E, F337F, FT337F, F337G, FT337GP, F337H, and FT337HP when modified per STC SA1627WE (Robertson STOL conversion) for S-TEC System 20 or later FAA Approved revisions of the above supplement.

5.. FAA/DAS Approved Supplemental Flight Manual, P/N 891899, dated 10-25-99 is required for SFM for Reims Aviation S.A. Models Cessna F337E, FT337E, F337F, FT337F, F337G, FT337GP, F337H, and FT337HP and the above models when modified per STC SA937CE (Horton STOL Craft conversion) for S-TEC System 30 or later FAA Approved revisions of the above supplement.

6. FAA/DAS Approved Supplemental Flight Manual, P/N 891900, dated 10-25-99 is required for Reims Aviation S.A. Models Cessna F337E, FT337E, F337F, FT337F, F337G, FT337GP, F337H, and FT337HP when modified per STC SA1627WE (Robertson STOL conversion) for S-TEC System 30 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 ZIP 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)

- October 25, 1999: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6c/ef/6cefd1b222f364ed9e558311aad9be256d3df206f21a5ac7cd38c2ddf4bdbeb6)

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