# STC SA09415AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 50XP two axis automatic flight guidance system, Model ST-779.
- Applied: October 11, 1999
- Status date: October 13, 1999
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A13](https://openairdocs.org/tcds/2A13)
- Certificate PDF: https://openairdocs.org/files/sha256/50/63/5063be338a34a66ef3783f096bb0742a007b8a56c4e848a09c9189a0902296f1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41873C8980A8367585256CC1007F3AEC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09415AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-28-140 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))

## 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 SA09415AC-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 following product with the limitations and conditions therefor as perfed heron meets the aurothiness requisements of Last 3 of the Cird dis Regulations.

Original Product Type Certifiate Number: 2A13 Make: Piper At odet: PA-28-140 Description of Type Design Change:

Installation of S-TEC System SOXP Two Axis Automatic Flight Guidance System, Model ST-779, according to Bulletin No. 879, dated 10-08-99 and Master Drawing List No. 921159, dated 10-08-99 or later FAA Approved revisions of the above data (14 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: 10-11-99 Date Reissued:

Inte of ismance: 10-13-99 Date Amended:

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

FAA Form 9110-2(10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09415 AC-D Limitations and Conditions: (con't.)

1. Only eligible on model PA-28-140, S/N 28-21392.

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891876, dated 10-13-99 is required for Piper model PA-28-140, S/N 28-21392 or later FAA Approved revisions of the above supplement.

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

FAA Farm 8110-2-1(16-69) 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 13, 1999: Issued, Current. [certificate](https://openairdocs.org/files/sha256/50/63/5063be338a34a66ef3783f096bb0742a007b8a56c4e848a09c9189a0902296f1)

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