# STC SA1677CE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation, Inc, United States
- Description: Installation of Sperry SPZ-500 automatic flight control system.
- Status date: September 25, 1981
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A5SW](https://openairdocs.org/tcds/A5SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1CA1D7EE6FAC44F885256CC10083CEAA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1677CE

## ADs that name it (0)

None.

## Approved models (1)

- Fairchild Aircraft Corporation SA227-AT ([TCDS A5SW](https://openairdocs.org/tcds/A5SW))

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