# STC ST147RM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraft Radio & Accessory Company Inc, United States
- Description: Installation of Communications Components Corp. Ontrac III VLF/Omega navigation system.
- Applied: January 24, 1978
- Status date: August 7, 1978
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/76/0a/760aa30b960588bb157b9c232a0d0c21f031c8698e8f45815638bf3c00eedf2d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B72252818B30EAA985256CC300035F3F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST147RM

## ADs that name it (0)

None.

## Approved models (2)

- Learjet Inc. 25 ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))
- Learjet Inc. 25B ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## What the certificate says

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

T405RM-S United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number ST147 RM This certificate issued to: Aircraft Radio and Accessory, Inc.

Hangar 1, Stapleton International Airport Denver, Colorado 80207 Part 25 of the Federal Aviation Regulations.

Original Product -Type bertificate Numben: ATOCE Make: Gates Learjet Model: 25/25B Description of Type Design Change:

Installation of Communications Components Corporation Ontrac III VLF/Omega Navigation System in accordance with Aircraft Radio and Accessory, Inc.

Top Drawing No. DL112.

Airplane Flight Manual Supplement dated August 7, 1978, is a required part of this installation.

This approval should not be extended to airplanes of these models on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modifications will introduce no adverse effect upon the airworthiness of the aircraft.

Date of Application: January 24, 1978 Date Reissued:

Date of Issuance: August 7, 1978 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Suall E. Hadblood (Signature ) * MINISTRATO GERALD E. GOODBLOOD, Chief Engineering and Manufacturing Br., ARM-210 (Title)

47.

## Every issue (1)

- August 7, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/76/0a/760aa30b960588bb157b9c232a0d0c21f031c8698e8f45815638bf3c00eedf2d)

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