# STC SA1645SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Atlantic Southeast Airlines, Inc., United States
- Description: Installation of ITT Neo-Dyn autofeathering switches as alternatives to the CCC auto- feathering switches.
- Status date: September 19, 1984
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A21SO](https://openairdocs.org/tcds/A21SO)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/185BBE44FB2D4EEC85256CC1008214F0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1645SO

## ADs that name it (0)

None.

## Approved models (2)

- Embraer - Empresa Brasileira de Aeronautica S.A. EMB-110P1 ([TCDS A21SO](https://openairdocs.org/tcds/A21SO))
- Embraer - Empresa Brasileira de Aeronautica S.A. EMB-110P2 ([TCDS A21SO](https://openairdocs.org/tcds/A21SO))

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