# STC SA3180SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK420 consisting of Century I
Autopilot with Optional Omni Tracker System
- Applied: January 28, 1977
- Status date: June 18, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- Certificate PDF: https://openairdocs.org/files/sha256/db/24/db249a7cd63fb657f4fe51b10fcb7ef9880da59b62d2eaf1f7b00f70e0721020
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A2BA8576035C6ABC85256CC2000A94E6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3180SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Textron Aviation Inc. 177 ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Textron Aviation Inc. 177A ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Textron Aviation Inc. 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

## 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: SA318054-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Purt 23 of the Federal Aviation Regulations:

Original Product - Type bertificate Number: A13CE Make: Cessna Model: 177, 1771, 177B Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK420 consisting of Century I Autopilot with Optional Omni Tracker System according to Bulletin No. 543, Revision 2, dated 1-27-77 and Master Drawing List No. 87A652, Revision B, dated 1-27-77.

Limitations and Conditions: Also eligible on Cessna Model 177 when modified in accordance with STC SA906CE. FAA/DAS Approved Supplemental Flight Manual, P/N 68S502, dated 2-4-77 is required for Cessna Models 177 and 177A and Cessna Model 177B, S/N 17701371 thru S/N 17702313 and Cessna Model 177 when modified in accordance with STC SA906CE.

is required for Cessna Model 177B, S/N 17702314 and up. FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 685504, dated 2-4-77 Compatíbility of this modification with other previously approved modifications

Date of Application: 1-28-77 Juke missued: 6-18-84, Revision 1 Date of Issuance: 2-4-77 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Don P. Watson (Signalure) TAMIN STRATOR Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FORM 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (139135 preo sequers") from (Name of grantor) (Print or type) (Address of grantor) ( Number and streel ;

(City, Stake, and 2IP code, Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

+ 11 + r. 0~. 1098-282-170

## Every issue (1)

- June 18, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/db/24/db249a7cd63fb657f4fe51b10fcb7ef9880da59b62d2eaf1f7b00f70e0721020)

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