# STC ST00264WI

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation, Inc, United States
- Description: Installation of an AlliedSignal Sundstrand Mark VI ground proximity warning system (GPWS).
- Status date: February 7, 1995
- 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/2960C5660BC5FC0785256CC2006A71EA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00264WI

## ADs that name it (0)

None.

## Approved models (1)

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

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.