# STC ST00166AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc, United States
- Description: Installation of a CAS-81 TCAS II and dual TRA-67 Mode S transponders.
- Applied: February 16, 1993
- Status date: January 4, 2022
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/b7/f6/b7f65563a6c2616f873523b66316f7ade1980e5c0730db5be312ba4882534736
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172486307920221208150448.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00166AT

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 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 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

ST00166AT Honeywell International Inc.

21111 N 19th Ave Phoenix, Arizona 85027 4b Civil Air Regulations A3WE Boeing 727-100, -200 Installation of a CAS-81 TCAS II and dual TRA-67 Mode S transponders in accordance with Master Drawing List No. 756-0003-001, Revision A, dated October 8, 1999, or later FAA approved revision.

FAA approved Airplane Flight Manual Supplement No. 756-0003-800, Revision A, dated October 19, 1999, or later FAA approved revision, is a required part of this STC. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane.

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.

February 16, 1993 July 27, 2000; January 4, 2022 March 26, 1993 February 26,1999 For Acting Manager, Seattle ACO Branch 2

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

ST00166AT 2

## Every issue (3)

- January 4, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b7/f6/b7f65563a6c2616f873523b66316f7ade1980e5c0730db5be312ba4882534736)
- January 4, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e7/54/e754adefc0a7c5029253c95170f12c343d334f1469a73ed0e68f5e6dad8a63d9)
- July 27, 2000: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/4e/30/4e30adc3d4c6207561d5e2f6b427ca5ba536fbab222cc068228e77e463b92e54)

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