# STC SA3291SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK739 consisting of Century IV autopilot or AK739FD consisting of Century IV Flight Director autopilot with optional remote annunciator.
- Applied: May 16, 1978
- Status date: March 28, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/75/43/7543b543ebe68aa8517f3234946998f6da293b38be83deccdd5e95547846b41e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D9CE1DFC5C117DC986257DB30078223F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3291SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company P210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

•-/Ifau/a&o ZfoeatmaJ \J Beparttnent of transportation —federal Stoiation administration Supplemental 'Cuje Certificate *SlU<m0€<T' SA3291SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 jA&^yfi&deAjtpn^^.jA^fitfoiv^^ .<$i^xr«W o fMvll Air 3A.21 Cessna P210N rux4< .' Installation tif Mltchell Automatic Flight System Model AK739 consisting of a Century IV Autopilot or AK739FD consisting of a Century IV Flight Director Autopilot with Optional Remote Annunciator according to Bulletin No. 874 dated 5-15-78 and Master Drawing List No. 87A10111 dated 5-15-78 (28 Volt System), or later FAA approved revision.

Supplemental Flight Manual P/N 68S716 dated 5-30-78 is required.

Placard P/N 13A660-2 is required.

»PP*°ved modifications 3-28-84 Revision 1 Don P. WatSOn (Signature) Manager, Aircraft Certification Division Southwest Region (Title)

**FAA FOUM 8110-2(10-68)**

y be used ,o notify .he appropriate FAA Kepona. Office of the transfer of this Supplemental Type Certificate.

The FAA will reiuue the certifica.e in the name of the transferee and forward it 10 him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number.

to (Name of transferee).

(Address of transferee) _ (Ctt>.

from (Name of grantor) (Print or type).

(Address of grantor) __ (City, SUU.

Signature of grantor (In ink): ——

## Every issue (1)

- March 28, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/75/43/7543b543ebe68aa8517f3234946998f6da293b38be83deccdd5e95547846b41e)

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