# STC ST606CH-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Duncan Aviation, United States
- Description: Installation of dual Universal navigation Corporation UNS-1Csp flight management systems.
- Status date: January 20, 1998
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9NM](https://openairdocs.org/tcds/A9NM)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4DEAA22E24B4549885256CC3000360AC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST606CH-D

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 650 ([TCDS A9NM](https://openairdocs.org/tcds/A9NM))

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