# STC SA3422SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Mitchell automatic flight system model AK923 consisting of command electric trim.
- Status date: August 23, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7SO](https://openairdocs.org/tcds/A7SO)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9DD6BF634987A5FC85256CC2000A97E9.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3422SW-D

## ADs that name it (0)

None.

## Approved models (3)

- The New Piper Aircraft Inc. PA-34-200T ([TCDS A7SO](https://openairdocs.org/tcds/A7SO))
- The New Piper Aircraft Inc. PA-34-220T (III) ([TCDS A7SO](https://openairdocs.org/tcds/A7SO))
- The New Piper Aircraft Inc. PA-34-220T (IV) ([TCDS A7SO](https://openairdocs.org/tcds/A7SO))

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