# STC ST09406SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Associated Air Center, Inc. - c/o CT Corporation System, USA
- Description: Installation of a Bendix-King CAS 81 TCAS with dual TRA-67 Mode S Transponders
- Applied: August 25, 1997
- Status date: December 18, 2017
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/7b/96/7b966018a8d399ea08eb889cb9ca1c3bd4b20953d8357974642d1edcde5be80c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161273963620230411160442.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST09406SC

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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 (8/13) Page 1

Part of the Federal A viation Regulations.

Original Product – Type Certificate Number: MDNH:

MRGHO:

Signature

Title

ST09406SC Associated Air Center, Inc. - c/o CT Corporation System 1999 Bryan Street, Suite 900 Dallas, TX 75201 4b A3WE Boeing 727-100 Installation of a Bendix-King CAS 81 TCAS with dual TRA-67 Mode S Transponders in accordance with Associated Air Center Drawing List No. 054000000, Revision J, dated January 12, 1998, or later FAA approved revision. Airplane Flight Manual Supplement No. R054-007, Revision IR, dated February 17, 1998, or later FAA approved revision is required.

Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This approval is limited to only the installation made in a Boeing 727-100, Registration No. N727AK, Serial No. 19123.

Certification Basis of this STC refers to Part 4b of the Civil Air Regulations (CAR 4b.)

8/25/1997 2/17/1998 12/18/2017 Jose Mora-Vargas ODA Administrator ODA-710437-SW

FAA Form 8110-2 (8/13) Page 2

To (Name and address of transferee) From (Name and address of grantor) Extent of Authority (if licensing agreement):

ST09406SC

## Every issue (1)

- December 18, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7b/96/7b966018a8d399ea08eb889cb9ca1c3bd4b20953d8357974642d1edcde5be80c)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.