# STC SA01815LA

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sandel Avionics LLC, United States
- Description: Installation of Sandel Avionics SN3500 Electronic Horizontal Situation Indicator (EHSI).
- Applied: May 10, 2005
- Status date: June 23, 2021
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/dc/be/dcbe1bc03636f36cf11f1f80dcfd5829c177fea5141213017ca6ebfa1b2f488a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D9A7D1E0484A96BE8625875D006A4F0E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA01815LA

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 421C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## 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.

Part of .

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ SA01815LA Sandel Avionics, Inc.

1370 Decision Street, Suite D Vista, CA 92081 3 the Civil Aviation Regulations A7CE Cessna Aircraft Company 42C1 Series

Installation of Sandel Avionics SN3500 Electronic Horizontal Situation Indicator (EHSI) in accordance with FAA Approved Sandel Avionics Master Drawing List, Document No. ST11694LA-A-01, Revision "B", dated July 22, 2005, or later FAA approved revision. FAA Approved Sandel Avionics Airplane Flight Manual Supplement, Supplement No. ST11694LA-A-10, Revision "Orig.", dated August 24, 2005, or later FAA approved revision.

This approval should not be incorporated in any aircraft unless it is determined that the interrelationship between this installation and any previous approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder must give the other person written evidence of that permission.

May 10, 2005

June 23, 2021 August 25, 2005

Manager, Technical & Administrative Support Section Los Angeles ACO Branch 2

United States of America Department of Transportation Federal AviationAdministration Supplemental TypeCertificate Number:

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ SA01815LA 2

## Every issue (2)

- June 23, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/dc/be/dcbe1bc03636f36cf11f1f80dcfd5829c177fea5141213017ca6ebfa1b2f488a)
- August 25, 2005: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/17/f0/17f0fe3cf6d5350a40b02cc1cad1dd4ee2dd667f563f9095f9156894c714842b)

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