# STC SA3400SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Mitchell automatic flight system Model AK903 consisting of Century31 autopilot.
- Status date: August 23, 1983
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A13](https://openairdocs.org/tcds/3A13)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/49D8D4A1FA1049D885256CC2000A97AE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3400SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company R182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13))
- The Cessna Aircraft Company TR182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13))

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