# STC SA3399SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Mitchell automatic flight system AK902 consisting of Century III autopilot with optional radio coupler and glide slope coupler.
- Status date: August 24, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A31EU](https://openairdocs.org/tcds/A31EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD3BC409FB1D840285256CC2000A97A1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3399SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Partenavia Costruzioni Aeronauticas S.p.A. P68 TC \"Observer\" ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))
- Partenavia Costruzioni Aeronauticas S.p.A. P68B ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))
- Partenavia Costruzioni Aeronauticas S.p.A. P68C ([TCDS A31EU](https://openairdocs.org/tcds/A31EU))

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