# STC SA8521SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of a Century Automatic Flight System, Model YK1044 consisting of a Century yaw damper.
- Status date: March 31, 2000
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12SO](https://openairdocs.org/tcds/A12SO)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A58A6CA9246827AF85256CC20058E812.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8521SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Commander Aircraft Company 112 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Company 112B ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Company 114 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Company 114A ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))

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