# STC SA7806SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 40/50 single and two axis automatic flight guidance systems, model ST-475-40/50.
- Applied: September 6, 1991
- Status date: September 16, 1991
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/4a/58/4a580875bac75257d2a8cdec805aec3fed18050bce70aadc356e3f990bba0be3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FEAE0DB89CBF7CD385256CC20056A4B1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7806SW-D

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company P210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

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

Bried Sons & A dia Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA78065W-0 This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 945 Wolters Industrial Complex Mineral Wells, Texas 76067 Port 3 of the CiVil Air Rogulations Original Product TypoContificato Numbos: 3A21 Make: Cessna Model: P210N Description of Type Design Change:

Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance systems, Model S!-4/5-40/50, according to Bulletin No. 575, dated 9-05-91 and Master Drawing List No. 92550, dated 9-05-91 is required and/or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on Cessna Model P210N When Modified Per STC SA756NW (Robertson STOL).

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

Thomas DAS Staff Coordinator, , DAS 5 SW (Tille)

**PAN FOR 8110-3 (10-681**

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA78065W-0 Limitations and Conditions: (con't.)

2. FAA/DAS Approved Supplemental Flight Manual, P/N 89941, dated 9-16-91 is required for Cessna Model P210N, S/N P21000001 Through S/N P27000150 And This Model When Modified Per STC SA756NW (Robertson STOL) for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

3. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 89942, dated 9-16-91 is required for Cessna Model P210N, S/N P21000151 And Up And This Model When Modified Per STC SA756NW (Robertson STOL) for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 89943, dated 9-16-91 is reis Model When Sodified Per STC SA756NW (RobertSon STOL) for S-TEC Sys- S/N P21000001 Through S/N P21000150 And tem 50 and/or later FAA Approved revisions of the above supplement.

5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 89944, dated 9-16-91 is required for Cessna Model P210N, S/N P21000151 And Up And This Model When Modified Per STC SA756NW (Robertson STOL) for S-TEC System 50 and/or later FAA Approved revisions of the above supplement.

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

**17 PAGE 2 OF 2 PAGES**

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 and streel) ( City. Stale, and ZIP code ) Extent of Authority (if licensing agreement):

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

## Every issue (1)

- September 16, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/4a/58/4a580875bac75257d2a8cdec805aec3fed18050bce70aadc356e3f990bba0be3)

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