# STC SA3539SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Textron Aviation Inc, United States
- Description: Installation of EFIS System on/off switches for Sperry Electronic Flight Instrument System EDZ-600 or Collins EFIS 85B(4)
- Applied: August 20, 1985
- Status date: January 23, 2017
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- Certificate PDF: https://openairdocs.org/files/sha256/81/88/8188c766b1a0fb7b4ae25da7b07532e54053bb295e2991fd9ee650d932825c84
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/567926721B9B81BB86258159004FFDC1.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3539SW

## ADs that name it (0)

None.

## Approved models (1)

- Beechcraft Corporation BAe.125 Series 800A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

## 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.

FAA Form 8110-2 (5/14) Page 1 of

Part of the

Signature

Title Textron Aviation Inc.

One Cessna Boulevard Wichita, KS 67215 2 SA3539SW Civil Air Regulations.

4b Installation of EFIS System Master On/Off switches for Sperry Electronic Flight Instrument System EDZ-600 or Collins EFIS 85B(4) in accordance with Arkansas Modification Center Drawing List 800-040, revision B1 dated 7/8/90, or later FAA approved revision.

One of the following FAA Approved Flight Manual Supplements, or later FAA approved revision, is required.

Supplement dated 11/22/85 for the Sperry EDZ-600 EFIS; Supplement dated 7/16/90 for the Collins EFIS 85B(4).

Compatibility of this modification with previously installed equipment must be determined by installer.

British Aero BAe 125-800A January 23, 2017 July 16, 1990 August 20, 1985 November 22, 1985 A3EU Mark Fuller STC ODA administrator ODA-100129-CE

FAA Form 8110-2 (5/14) Page 2 of

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (2)

- January 23, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/81/88/8188c766b1a0fb7b4ae25da7b07532e54053bb295e2991fd9ee650d932825c84)
- July 16, 1990: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/03/9a/039aee1cd70e13c886069c03deb063e81aacacbbb9e467862d9e1c8546c9342d)

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.