# STC SA3071SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Mitchell automatic flight system AK546 consisting of Century IIB autopilot with optional radio coupler.
- Status date: June 20, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A18CE](https://openairdocs.org/tcds/A18CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/480FEEC49266D2A585256CC2000A936E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3071SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Bellanca Aircraft Corporation 17-30A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Bellanca Aircraft Corporation 17-31A ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))
- Bellanca Aircraft Corporation 17-31ATC ([TCDS A18CE](https://openairdocs.org/tcds/A18CE))

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