# STC SA1705CE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation Inc, United States
- Description: Installation of Sperry SPZ-500 automatic flight control system.
- Applied: November 24, 1981
- Status date: December 7, 1981
- Product: Aircraft, Small Multi-Engine
- Data sheets: [TCDS A8SW](https://openairdocs.org/tcds/A8SW)
- Certificate PDF: https://openairdocs.org/files/sha256/86/4e/864eb40325fe72eaef539f65a2d0c4db56c1a8becbf254ffac9d805d211146a8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DE5888EB9E09BFB685256CC10083CF19.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1705CE

## ADs that name it (0)

None.

## Approved models (1)

- Fairchild Aircraft Corporation SA227-AC (C-26A) ([TCDS A8SW](https://openairdocs.org/tcds/A8SW))

## What the certificate says

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

## Every issue (1)

- December 7, 1981: Issued, Current. [certificate](https://openairdocs.org/files/sha256/86/4e/864eb40325fe72eaef539f65a2d0c4db56c1a8becbf254ffac9d805d211146a8)

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