# STC ST104CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Acron Aviation Inc., United States
- Description: Installation of a TCAS I and optional Data Recorder Unit
- Applied: December 20, 1991
- Status date: April 1, 2025
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A31SO](https://openairdocs.org/tcds/A31SO)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/2d/1f2dd021253ed35897ad152863c94fee04f2fd6b330cb09ee73f862220f7a6ae
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134708050620250805145529.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST104CH

## ADs that name it (0)

None.

## Approved models (3)

- Embraer S.A. EMB-120 ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))
- Embraer S.A. EMB-120ER ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))
- Embraer S.A. EMB-120RT ([TCDS A31SO](https://openairdocs.org/tcds/A31SO))

## 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.

ST104CH Acron Aviation Inc.

5353 52nd Street South East Grand Rapids, MI 49512-9704 Part 25 the Federal Aviation Regulations A31SO Embraer S.A.

EMB-120, EMB-120RT, EMB-120ER Installation of a TCAS I and optional Data Recorder Unit in accordance with Engineering Order BFG-EMB120-020, Rev. A, dated August 16, 1993 or later FAA approved revision.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. ST58CH is required to be installed previously or in conjunction with this installation.

3. FAA Approved Flight Manual Supplement dated June 29, 1995 or later FAA Approved revision is required.

4. 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.

December 20, 1991 August 26, 1993 July 3, 1995 for Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2 February 13, 2002; February 17, 2004;

December 12, 2022; April 1, 2025

ST104CH 2

## Every issue (2)

- April 1, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1f/2d/1f2dd021253ed35897ad152863c94fee04f2fd6b330cb09ee73f862220f7a6ae)
- December 12, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/16/7f/167f08fe92c9354c75d4f3825fef5f80efb3a7fc66e57c78ded8a45d55478ebb)

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