# STC SA7780SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 Pitch Stabilization System Model 331 with Optional Automatic Electric Trim System
- Applied: October 17, 1990
- Status date: March 10, 1995
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-777](https://openairdocs.org/tcds/A-777)
- Certificate PDF: https://openairdocs.org/files/sha256/5a/7f/5a7f790a8ca23f7ece842169b05b8187d1a30b27687b241c003fb5028e0b8259
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BD2E6213786FFC3A85256CC20056A488.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7780SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Raytheon Aircraft Company 35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company A35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company B35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))

## 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.

Bqiartmnit of transportation —jfoteral 3triarion ^ministration t:gpc Ccrtificatt SA7780SW-D S-TEC Corporation 946 Pegram Mineral Wells, TX 76067 C 1 V 1 I Air >'^*s~.f,A'~~. sjf. /,f.A*, sj**;y*m. '(zsi&na*' :

e~: A- 77 7 ; Beech .- 35, A35, and B35 Installation of S-TEC System 60 Pitch Stabilization System, Model ST-331 with Optional Automatic Electric Trim System according to Bulletin No. 431, Revision 2, dated 2-21-95 and Master Drawing List No. 92526, Revision B, dated 2-21-95 or later FAA Approved revisions of the above data (14 Volt System)

•'^•'^TtJ ffnfr v?i

1. Also eligible on Model 35 When Modified Per STC SA1-460 (Auxiliary Wing Tip Fuel Tanks).

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

p>"tm \-'Ai\ rtrft^rafr antr jft* iitfij'in-ffrty-(fa/a itriSrri t\t &t /ii.lii .Vr afiAr 10-17-90 10-26-90 3-10-95, Revision 1 William J. Thomas DAS Staff Coordinator, DAS 5 SW alteration of this ttrtificait u punishable by a fin* of not txcttding tl ,000, or imprisonment not txtreding 3 ytan, or both.

Tkit f*rt\ftntt maj Ar ttvuftm4 in ttmlimtt mitk FAR 21.17.

ttmtd Stairs Bepartmcnt of Iransportarion— jfcdcrai SKnation administration 3uppianental t^pe Certificate(Continuation ghat) SA7780SW-D, Revision 1 Limitations and Conditions (con't.)

2. FAA/DAS Approved Supplemental Flight Manual, P/N 89897, dated 10-26-90 is required for Beech Model 35 And The Above Model When Modified Per STC SA1-460 (Auxiliary Wing Tip Fuel Tanks) 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 891149, dated 3-10-95 is required for Beech Models A35 and B35 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.

Ini alteration of this certificate is punishablt by afint of not exceeding Si,OOP, or imprisonment not exceeding 3 years, or bnih.

AA FORM •! 10.2-1 (10-49) T/iit crrtifieati may bi irons/and in accordant! anth F.iR i'/.-l~ PAGE 2 OP 2 PAGES

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, Slalt, and ZJP code) from (Name oj grantor) (Print or type) (Address of grantor) (Number and street) I ('.lit. Stale, and ~^W fade) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- March 10, 1995: Amended, Current. [certificate](https://openairdocs.org/files/sha256/5a/7f/5a7f790a8ca23f7ece842169b05b8187d1a30b27687b241c003fb5028e0b8259)

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