# STC SA7148SW-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-405.
- Applied: April 13, 1987
- Status date: September 28, 1992
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/9f/73/9f73ed7e4b7da44ee3ba9318b9b8f09ee849018b13de19ca445d92ae1617c76b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8A64ABD42C68AD3985256CC20056A1AE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7148SW-D

## ADs that name it (0)

None.

## Approved models (3)

- The Cessna Aircraft Company 335 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- The Cessna Aircraft Company 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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.

Btparnnmt of transportation—jfotaal Station administration Supplemental Itgpe Certificate tsutrrwei*'SA7148SW-D S-TEC Corporation 946 Pegram Wolters Industrial Park Mineral Wells, Texas 76067 *^»^^^ 3 civil Air 3A25 Cessna 335, 340, and 340A Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-405, according to Bulletin No. 505, Revision 3, dated 8-21-92 and Master Drawing List No. 92440, Revision C, dated 8-21-92 and/or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on Models 340 and 340A When Modified Per STC SE4327SW (RAM Engine Conversion).

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

f<~: 4-13-87 5-01-87 ^^^^e^T^ td/a : 9-28-92, Revision 1 William J. Thomas DAS Staff Coordinator. DAS 5 SW Am alitration of this ctftifieatt it fiunishabl* by a fint of not txcttding SljOOO, or impntonmml not txtttding 3y«ant or TUt artifittt* m*f kt ti*vf<md ra «ordbwr Ml* FAR 21.17.

of " Btpartmmc of Transportation— rfcdmi Station Administration Supplemental HCgpe Certificate(Contiiraation £heet) SA7148SW-D Limitations and Conditions (con't.)

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89735, dated 5-01-87 is required for Cessna Models 335, 340, and 340A and/or later FAA Approved revisions of the above supplement.

3. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89735-1, dated 9-28-92 is required for Cessna Models 335, 340, and 340A and 340 and 340A When Modified Per STC SE4327SW (RAM Engine Conversion) and/or later FAA Approved revisions of the above supplement.

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

aitfTnttan of this certificate is punishable by ajint of not exceeding tl,000, or imprisonment not txcnding 3 years, or knitt.

FORM it 10.2.1 (io.«*> TAu tnlifitaH maf i« umtftrrtd at aaoniantt with F.tK .'/.•/" PACE 2 or 2

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to Ctfame of transferee.)

(Address of transferee) _ street) (City, State, andZlf code) from (Name of grantor) ((Print or type) _ ___ ___ (Address of grantor) street} (City, State, andZVP code) Exent of Authority (if licensing agreement) :

Signature of grantor (In inty : _ Page 2 of 2

## Every issue (1)

- September 28, 1992: Amended, Current. [certificate](https://openairdocs.org/files/sha256/9f/73/9f73ed7e4b7da44ee3ba9318b9b8f09ee849018b13de19ca445d92ae1617c76b)

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