# STC SA3403SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Edo Avionics automatic flight system AK 899 consisting of Century 31 autopilot.
- Status date: August 23, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A16](https://openairdocs.org/tcds/3A16)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2953FE62F0809E8285256CC2000A97B5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3403SW-D

## ADs that name it (0)

None.

## Approved models (7)

- Raytheon Aircraft Company 95-B55B (T-42A) ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company 95-C55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company 95-C55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company D55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company D55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company E55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company E55A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))

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