# STC SA3156SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK627 consisting of Century IIB
Autopilot with Optional Radio Coupler
- Applied: August 30, 1976
- Status date: June 6, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- Certificate PDF: https://openairdocs.org/files/sha256/d4/24/d4247ece822f274ceedaaa0c490414659547c386ab62a7388d5e9574a0be0bde
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4964A39BAEB90EF485256CC2000A9494.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3156SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-E23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

## 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: SA31564-D This certificate issued to: Century Flight Systems, Inc.

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

Original Product - Type Pertificate Number: 1A1O Make: Piper Model: PA-23-250, PA-E23-250 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK627 consisting of Century IIB Autopilot with Optional Radio Coupler according to Bulletin No. 754, dated 8-27-76 and Master Drawing List No. 87A883, dated 8-27-76.

Limitations and Conditions: Eligible on Piper Models PA-23-250, S/N 27-3944 and Up and PA-E23-250, S/N 27-3944 through 27-7554181 and PA-23-250, S/N 27-3944 and Up and PA-E23-250, S/N 27-3944 through 27-7554181 when modified in accordance with STC SA909WE.

(28 Volt Systems Only) FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S394, dated 9-9-76 is required for Piper Models PA-23-250, S/N 27-3944 through 27-7554181 & PA-E23-250, See Continuation Sheet, Page 2, a part of this SIC This se wipede and the supperting sast wich is the basis fur appo val shall mermain in effect until sur Compatibility of this modification with other previously approved modifications vendered, suspended, revoked, or a bermination dale is otherwise es lablished by the Adminis tral r f the Federal Aviation Administration .

Date of Application: 8-30-76 Jute missued: 6-6-84, Rev. 1 Date of Issuance: . 9-09-76 Date Amended: .

EDERAL AVIATION By dinetion up the Administraler Don P. Watson ( Signature ) TOMINISTRATO Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FORM 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA315654-D, Rev. 1, 6-6-84 Limitations and Conditions:

S/N 27-3944 through 27-7554181 & both models when modified in accordance with STC SA909WE or FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S414, dated 9-9-76 is required for Piper Models PA-23-250, S/N 27-7654001 and Up & when modified in accordance with STC SA909WE.

**FAA FORM 81102-1 (10-89) PAGE 2 OF 2 PAGES**

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

(Address of transferee) (Number and streel) (Cisy, Stake, and 2IP code) from (Name of grantor) (Print or sype) (Address of grantor) (Number and sireel ;

(City, Stake, and ZIP codes Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

+115 r. 0n. 1090-282-180

## Every issue (1)

- June 6, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d4/24/d4247ece822f274ceedaaa0c490414659547c386ab62a7388d5e9574a0be0bde)

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