# STC SA7807SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system Model ST-477
- Applied: October 16, 1991
- Status date: November 6, 1991
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A8](https://openairdocs.org/tcds/1A8)
- Certificate PDF: https://openairdocs.org/files/sha256/45/1c/451ca730f218087651900b42dd170dbeacbd3799840288b038b9b07790e9ebc7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/52F5B102CA7082B785256CC20056A4B2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7807SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Helio Aircraft LLC H-700 ([TCDS 1A8](https://openairdocs.org/tcds/1A8))
- Helio Aircraft LLC H-800 ([TCDS 1A8](https://openairdocs.org/tcds/1A8))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA78075N-0 This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 Certifies that the change in the type design for the following product with the limitations and conditions thomfor as specified horon meet the sinworthines reguirements of Port 3 of the CiVil Air Razelations Original Product -Tyro Centificate Numbon: 1A8 Маке: Helio Model: H-700 and H-800 Description of Type Design Change:

Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-477, according to Bulletin No. 577, dated 10-15-91 and Master Drawing List No.

92552, dated 10-15-91 and/or later FAA Approved revisions of the above data (28 Volt System).

1. Eligible on the above models in Landplane, Floatplane or Amphibian Configuration.

2. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89949S, dated 11-06-91 is required for Helio Models H-700 and H-800, Landplane, Floatplane of Amphibian Configuration and/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.

Thomas DAS Staff Coordinator, DAS 2 Su (Tille)

нАл ро06 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and streel) (City, State, and ZIP code) trom (Name of grantor) (Print or type) (Address of grantor) ( Nunher and streel) (Citr. State, and ElP code!

Date of Transfer: - Signature of grantor (In ink):

## Every issue (1)

- November 6, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/45/1c/451ca730f218087651900b42dd170dbeacbd3799840288b038b9b07790e9ebc7)

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