# STC SA3130SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK589 consisting of Century III
Autopilot with Optional Radio Coupler and Glide Slope Coupler
- Applied: February 23, 1976
- Status date: June 5, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/ef/77/ef77cfa1582c43202a1be778ac35242f57b85e7c3890af3a80a9f633aa7e5919
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D508D9B40AE3222885256CC2000A9440.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3130SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA31305W-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part 3 of the CIV11 Air Regulations:

Original Product - Type bertificate Number: ASEA Make: Piper Model: PA-31 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK589 consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 713, dated 2-9-76 and Master Drawing List No. 87A840, dated 2-9-76 Limitations and Conditions:

Eligible only on PA-31, S/N 31-660 and S/N 31-712 and Up FAA/DAS Approved Airplane Flight Manual Supplement, P/N 685339, dated 4-15-76 is required.

Placard, P/N 13A660 is required.

Date of Application: 2-23-76 Jute missed. 6-05-84, Revision 1 Hale sf issuance. 4-15-76 Jale unended:

EDERA AVIATION By Direction of the Administrator Don P. Watson (Signature) TO MINISTRATO Manager, Aircraft Certification Division Southwest Region (Tille)

47.

**FAN FORM 8110-2 (10-68)**

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and streel) from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel ;

(Cily, Stale, and ZIP code, Extent of Authority (if licensing agreement):

Date of Transter:.

Signature of grantor (In ink):

+11=r.0~. 1040-442-000

## Every issue (1)

- June 5, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ef/77/ef77cfa1582c43202a1be778ac35242f57b85e7c3890af3a80a9f633aa7e5919)

---
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.