# STC SA978SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraftsmen Inc, United States
- Description: Collins FD108 flight director system.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F12D7E8E137CA8AB862570D2006B6171.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA978SW

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 421 Series ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

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