# STC SA3378SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Mitchell automatic flight system AK841 consisting of Century 41autopilot or AK841FD consisting of Century 41 flight director autopilot.
- Status date: August 24, 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/2198A1FA5F866BA885256CC2000A9772.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3378SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Raytheon Aircraft Company 95-B55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company 95-B55A ([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))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.