# STC ST09108SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Associated Air Center, Inc. - c/o CT Corporation System, United States
- Description: Installation of a Collins Avionics TTR-920 TCAS II with dual Collins Avionics TDR-94D Mode S transponders.
- Applied: August 8, 1995
- Status date: December 18, 2017
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/95/6b9549c41192892a56e5a043926116e1d79e19d54d52b4a47cb5f3b9e9827f22
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149471101620230410133715.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST09108SC

## 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

ST09108SC 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 Collins Avionics TTR-920 TCAS II with dual Collins Avionics TDR-94D Mode S Transponders in accordance with Associated Air Center Drawing List No. 076000000, Revision C, dated October 23, 1995, or later FAA approved revision.

This STC provides one time approval for aircraft Serial Number 19394. FAA approved Airplane Flight Manual Supplement No.

95-727-402, Revision IR, dated September 29, 1995, or later FAA approved revision.

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

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

8/8/1995 10/23/1995 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):

ST09108SC

## Every issue (1)

- December 18, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6b/95/6b9549c41192892a56e5a043926116e1d79e19d54d52b4a47cb5f3b9e9827f22)

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