# STC ST09109SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries Ltd., United States
- Description: Installation of avionics master switch.
- Applied: February 24, 1994
- Status date: July 31, 2017
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE)
- Certificate PDF: https://openairdocs.org/files/sha256/a4/3f/a43f187e9726d04a8aabd059aaa08381711400b1fd52ce935908f69a2b82b0dd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4FE1FC0941278CBF86258726004D8568.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST09109SC

## ADs that name it (0)

None.

## Approved models (1)

- Textron Aviation Inc. 500 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))

## 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 2

Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced.

Number: ST09109SC

Part 25 of the Federal Aviation Regulations.

Original Product – Type Certificate Number: A22CE Make: Cessna Model: 500

Installation of avionics master switch in accordance with Sierra Industries, Inc. Drawing List SI-250-000, Revision B, dated March 27, 1995, or later FAA approved revision.

FAA approved Airplane Flight Manual Supplement dated October 4, 1995, or later FAA approved revision, is required.

Compatibility of this design change with previously approved modifications must be determined by the installer. If the holder agrees to permit another person to use this certificate to alter the produ ct, the holder shall give the other person written evidence of that permission.

Date of Application: February 24, 1994 Date Reissued: July 21, 2005; July 31, 2017 Date of Issuance: October 04, 1995 Date Amended:

Signature

Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd.

122 Howard Langford Drive Uvalde, TX 78801

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

Transfer the ownership of Supplemental Type Certificate Number: ST09109SC

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA18NW

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (2)

- July 31, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a4/3f/a43f187e9726d04a8aabd059aaa08381711400b1fd52ce935908f69a2b82b0dd)
- July 21, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/19/40/194011c3fb36a527fa1575f14ea6c3e1895b74db86ef0e4c5f746c2a2bc96747)

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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.