# STC SA3390SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system Model AK895 consisting of a Century 31 autopilot.
- Applied: May 3, 1982
- Status date: August 15, 1983
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A7SO](https://openairdocs.org/tcds/A7SO)
- Certificate PDF: https://openairdocs.org/files/sha256/5e/4a/5e4a843dd6b082b233c910b48e2724e410d5600411f1c728fe732cf886ea166a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F568A458E825A2AF85256CC2000A9792.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3390SW-D

## ADs that name it (0)

None.

## Approved models (2)

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

## 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.

United States of ararrica Bepartment of transportation federal atriation administration Certificate SA3390SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 Jfa/^yfivdtAj^ : A7SO : Piper : PA-34-200T, PA-34-220T Installation of Mitchell Automatic Flight System Model AK895 consisting of a Century 31 Autopilot according to Bulletin No. 1027, dated 4-16-82 and Master Drawing List No. 87A1113, dated 4-16-82 (14 Volt System) and/or later FAA approved revision.

Pilot's Operating Handbook and FAA Approved Flight Manual Supplement, P/N 68S942, dated 5-6-82 and/or later FAA approved revision.

Placard P/N 13A990-1 is required.

Compatibility of this modification with other previously approved modifications mutst be determied by the installer.

tu'^ ^A™ : 5-3-82 L/«6 rr^K,,/. 8-15-83 Revision 1 >' .' 5""O""O2 . — ' **& 4t f/tf ttdfff •' Manager, Aircraft Certification Division Southwest Region (Title)

FAA FO«M 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee). iXumhtr tnd ttrttl) (City, Slate.

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

(Address of grantor) __ (Xvmktr tint ilrttl) (Gfy, SUU, Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 15, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5e/4a/5e4a843dd6b082b233c910b48e2724e410d5600411f1c728fe732cf886ea166a)

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