# STC ST09470AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aviation Systems Standards, Aircraft Maintenance and Engineering Division AVN-300, United States
- Description: Installation of KY-58 Audio Encryption in Exisitng UHF Comm system
- Applied: January 2, 2002
- Status date: April 24, 2002
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A21EA](https://openairdocs.org/tcds/A21EA)
- Certificate PDF: https://openairdocs.org/files/sha256/2c/16/2c16448467ff8e05383d7e748761c15ba569c3bccdf421ec1126ac3bf2c7e60d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/37AD6C2969AB905C8625824E00590A64.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST09470AC-D

## ADs that name it (0)

None.

## Approved models (1)

- Bombardier Inc. CL-600-2B16 (CL-601-3R) ([TCDS A21EA](https://openairdocs.org/tcds/A21EA))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST09470AC-D This certificate issued to: Aviation System Standards Flight Inspection Maintenance Division, AVN-300 6500 S. MacArthur Boulevard oklahoma City, OK 73169 Part 25 of the Federal Aviation Regulations:

Original Product - Type Cerlificate Number: A21EA Make: Bombardier Inc.

Model: CL-600-2B16 (CL-601-3R) Description of Type Design Change:

Installation of KY-58 Audio Encryption in Existing UHF Comm System.

alteration is to be made in accordance with data list D09470, dated April 24, 2002, or later approved FAA (DAS) revisions.

FAA approved airplane flight manual supplement, ¿UHF Secure Voice (KY-58) System, ' dated April 24, 2002, is required. Compatibility of the alteration with other approved alterations is to be determined by the installer.

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of Application: January 2, 2002 Date Reissued:

Date of Issuance: April 24, 2002 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Spent Rogens TAN MISTAKIN DAS Coordinator (Sighature) (Title)

47.

## Every issue (1)

- April 24, 2002: Issued, Current. [certificate](https://openairdocs.org/files/sha256/2c/16/2c16448467ff8e05383d7e748761c15ba569c3bccdf421ec1126ac3bf2c7e60d)

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