# STC SA8676SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Western Skyways, Inc., United States
- Description: Installation of STC SE8677SW modified turbonormalized Continental IO-520-B, IO-520-BA, IO-520-BB, or IO-550-B engine.
- Applied: April 30, 1992
- Status date: March 15, 2017
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/18/fe/18feae4945b6a4a7b2419f22bcbd5dbc98380f943179dea7b7b05b773047d25a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/758737ED187585E4862581010060D0D5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8676SW

## ADs that name it (0)

None.

## Approved models (9)

- Beechcraft Corporation 35-C33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation A36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation S35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35B ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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.

Civil Aviation

3A15 Beech 35-C33A; 36; A36; E33A; F33A; S35; V35; V35A; V35B

Installation of STC SE8677SW modified turbonormalized Continental IO-520-B, IO-520-BA, IO-520-BB, or IO-550-B engine in accordance with Western Skyways Master Drawing List No. DL92001, Rev. 9, dated July 9, 2007, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement Document No. 38000 Rev. A, dated July 12, 2007, or later FAA approved revision is required for the installation of the turbonormalized Continental IO-520-B, - BA, -BB engine. FAA approved Airplane Flight Manual Supplement Document No. 38001 Rev. A, dated July 12, 2007, or later FAA approved revision is required for the installation of the turbonormalized Continental IO-550-B engine.

1. STC SE8677SW is required.

2. Operating altitude limit is 24,000 feet.

3. Minimum fuel grade is 100LL.

4. Manifold pressure is limited to 29.6 in Hg. and engine speed is limited to 2700 RPM.

5. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Western Skyways, Inc.

140 Industrial Drive Burlington, WI 53105

April 30, 1992

August 18, 1993 3/2/94; 1/31/05; 6/6/05; 7/26/10; 10/30/13 3/15/17

11/4/93; 1/24/94; 9/11/95; 9/26/06; 9/13/07

(Signature) Roy E. Boffo III Manager, Propulsion and Program Management Branch Chicago Aircraft Certification Office

(Title)

## Every issue (5)

- March 15, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/18/fe/18feae4945b6a4a7b2419f22bcbd5dbc98380f943179dea7b7b05b773047d25a)
- October 30, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1a/40/1a40d149ec617dd205b9c43a2f66cc33d412dfba73923c70a80405fe35357761)
- July 26, 2010: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/c5/fc/c5fcbda348e0967f07d2142509e43fb0adbe9eb6aa18359eccd09f873fbe3747)
- September 13, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/51/ea/51ea31d13489f67cb85fe0fa3f673c6a840ef55967165081def151c613f964d1)
- June 6, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/02/24/0224183095e7e96fb2c519160ed68adabc7737ab0e5827e7261d3a5ccf5e022e)

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