# STC SA7804SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S/TEC System 40/50 single and two axis automatic flight guidance systems.
- Applied: July 26, 1991
- Status date: April 6, 1992
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 5A4](https://openairdocs.org/tcds/5A4)
- Certificate PDF: https://openairdocs.org/files/sha256/2e/1d/2e1d96e3bb229d3f3ef68238e4c5476a61c2ae437f005d472458b2beefd81146
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5C36BBC9202A08AD85256CC20056A4AF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7804SW-D

## ADs that name it (0)

None.

## Approved models (10)

- Raytheon Aircraft Company D50 (L-23E) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50A ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50B ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50C ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50E ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company E50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company F50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company G50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company H50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company J50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

rn Btpartmtnt of transportation— fetal atriation administration Supplemental *Cgpe Certificate

- «4»na SA7804SW-D S-TEC Corporation 946 Pegram Wolters Industrial Park Mineral Wells, Texas 76067- fAf fy^tt (/Mian^r £^ •nr/cirnir^'<Jtrnit Civil Air 5A4 BEECH D50, D50A, D50B, D50C, D50E, E50, F50, 650, Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-473-40/50, according to Bulletin No. 574, Revision 2, dated 3-13-92 and Master Drawing List No. 92548, Revision B, dated 3-13-92 and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89935, dated 7-30-91 is required for Beech Models D50, D50A, D50B, D50C, and D50E for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

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

£&/fninii/Fo£>v^^e 7-26-91 7-30-91 f: 10-07-91, 4-06-92 Revision 2 William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

Tkit tertifeale may Ar IraiuferrtJ m aenrJana itntk FAR 21.17.

Bepartment of Transportation— .federal SUrtation SUmrnistratwn Supplemental t:gpe Certificate(Continuation £heet) SA7804SW-D, Revision 2 Limitations and Conditions (con't.)

2. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89960, dated 4-06-92 is required for Beech Models E50, F50, 650, H50, and J50 for S-TEC System 40 and/or later FAA Approved revisions of the above supplement.

3. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89936, dated 7-30-91 is required for Beech Models 050, D50A, D50B, D50C, and D50E for S-TEC System 50 and/or later FAA Approved revisions of the above supplement.

4. FAA/DAS Approved Airplane Flight Manual Supplement, P/N 89961, dated 4-06-92 is required for Beech Models E50, F50, G50, H50, and J50 for S-TEC System 50 and/or later FAA Approved revisions of the above supplement.

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

I'M aitetiitton of this certificate is punishable by a fine of not exceeding SI,OOP, or imprisonment not exceeding 3 years, or hmh.

AA FORM ano-2.1 (io-«»> T/ta ctrtificatt may 4» transferrtd in atcordanct u>tiH l:.-\lt .'J.-i?

**PACE 2 OF 2**

Slate, and -J/P code) from (Name of grantor) (Print or type) (Address of grantor) nniher and street) ( Cilt. Slate, and -£//* code} Extent of Authority (if licensing agreement): _ Date of Transfer:.

Signature of grantor (In ink):

## Every issue (1)

- April 6, 1992: Amended, Current. [certificate](https://openairdocs.org/files/sha256/2e/1d/2e1d96e3bb229d3f3ef68238e4c5476a61c2ae437f005d472458b2beefd81146)

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