# STC SA09397AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-849
- Applied: October 23, 1998
- Status date: July 1, 2003
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/75/db/75db029e724762d41eaebb7069dfa53f2ce9c7447a742a2dbbc5e749aef07305
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D998D6F358315CC686256D95006F1BD2.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09397AC-D

## ADs that name it (0)

None.

## Approved models (4)

- Piper Aircraft Inc. PA-31 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-300 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-325 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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: SA09397ACD SP1959AC-A JRS -150 This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Purt 3 of the Civil Air Regulations.

Original Product Type Certificate Namber: A20SO Make: Piper Model: PA-31, PA-31-300, PA-31-325, and PA-31-350 Description of Type Design Change: Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-849, according to Bulletin No. 949, Revision 5, dated July 1, 2003, and Master Drawing List No. 921136, Revision E, dated July 1, 2003, or later FAA approved revisions (28 volt System). See Continuation Sheet, Page 3) Limitations and Conditions:

1. Also eligible on Models PA-31, and PA-31-300 when modified per STC SA970SO.

2. Also eligible on Model PA-31-325 when modified per STC SA00048SE.

(See Continuation Sheet, Page 3) Owsley Manager, Airplane Certification Office, Southwest Region (Title)

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

Signature of grantor (In ink):

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Description of Type Design Change: (continued)

1. For Piper models PA-31 and PA-31-300, FAA/DAS approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891822, dated November 9, 1998, or later FAA/DAS approved revision is required.

2. For Piper models PA-31-325, FAA/DAS approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891823, dated November 9, 1998, or later FAA/DAS approved revisions is required.

3. For Piper Models PA-31-350, FAA approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891824, Revision 2, dated July 1, 2003, or later FAA approved revisions is required.

Limitations and Conditions: (continued)

3. Also eligible on Models PA-31-350 when modified with STCS SA1151SO, SA5796NM, SA00192SE, SA00039SE and/or STC SA00126SE.

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

END or imprisonment not exceeding 3 years, or both.

FAA Form 8110-2-1(10-69) Page 3 of 3

## Every issue (1)

- July 1, 2003: Amended, Current. [certificate](https://openairdocs.org/files/sha256/75/db/75db029e724762d41eaebb7069dfa53f2ce9c7447a742a2dbbc5e749aef07305)

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