# STC ST00066AT

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: TIMCO, United States
- Description: Installation of dual universal navigation UNS-1A flight management systems.
- Applied: August 28, 1992
- Status date: December 29, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/07/11/0711cad8a97e0782762e5ac41e44cfda3f9eb96d6b47a97c3a465b82dda50ec4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AB611F29D27CDB6B8625756D00742A43.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00066AT

## 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

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- December 29, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/07/11/0711cad8a97e0782762e5ac41e44cfda3f9eb96d6b47a97c3a465b82dda50ec4)

---
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.