# STC SA09390AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-841.
- Applied: September 15, 1998
- Status date: September 17, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16EA](https://openairdocs.org/tcds/A16EA)
- Certificate PDF: https://openairdocs.org/files/sha256/41/89/4189686e81e5e1a53f9963b8dd0b64c093aa0464e00189f512abc497fe5e30bf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CFBAF666173E153185256CC1007F3AD6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09390AC-D

## ADs that name it (0)

None.

## Approved models (2)

- True Flight Holdings LLC AA-5A ([TCDS A16EA](https://openairdocs.org/tcds/A16EA))
- True Flight Holdings LLC AA-5B ([TCDS A16EA](https://openairdocs.org/tcds/A16EA))

## 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: SA09390AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Lart 23 of the Federal A viation Kegutations.

Original Product I ype Certifcate A unter: A 16EA Make: American General Al cdel: AA-5A and AA-5B Description of Type Design Change: ;

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-841, according to Bulletin No. 941.

dated 9-14-98 and Master Drawing List No. 921119, dated 9-14-98 or later FAA Approved revisions of the above data (14 Volt System).

L FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891800, dated 9-17-98 is required for American General Models AA-SA and AA-5B or later FAA Approved revisions of the above supplement.

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

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.

saspended, revoked or a termination date is otherse established by the stdministator of the Federal- viation Adminstration.

Date of Application: 9-15-98 Date Reissued:

Date of Issuance: 9-17-98 Date Amended:

By Direction of the Administrator ÇEDERAL AVIATION shill I (Signature) TOMINISTRATIO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

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)

- September 17, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/41/89/4189686e81e5e1a53f9963b8dd0b64c093aa0464e00189f512abc497fe5e30bf)

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