# STC SA1638SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system Model AK355, consisting of Century I with omni tracker.
- Applied: October 25, 1972
- Status date: July 16, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A1EA](https://openairdocs.org/tcds/A1EA)
- Certificate PDF: https://openairdocs.org/files/sha256/2b/93/2b93fdeb7ef458a3155588daf60609fef4c8205a8952d6b505da49709138c587
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0CE2DCBC8C14361285256CC1008214D8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1638SW

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-39 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA))

## 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: SA16385W This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part 3 of the CIV$1 Air Regulations:

Original Product - Type bentificate Number: AIEA Make: Piper Model: PA-39 Description of Type Design Change: Installation of Mitchell Automatic Flight System Model AK355, consisting of Century I with optional Omni Tracker according to Bulletin 516 dated 8-30-72 and Master Drawing List 87A619 dated 10-25-72.

FAA Approved Airplane Flight Manual Supplement dated 4-9-73 is required for Piper Model PA-39 and PA-39 modified per STC SA727WE and/or SA787WE.

his cortificate and the supportiny dalu unia must be determined by the dalu which is the baris fur appr-nal shull remain in effect undu sur Compatibility of this modification with other previously approved modifications vendered, suspended, revoked, or a termination date is sherwise established by the Administrater of the Federal Aviation Administration Date of Application: October 25, 1972 Jule reissued: July 16, 1984, Revision 1 Date of Issuance: April 9, 1973 Date Amended:

¡EDERAL AVIATION Don P. Watson (Signature ) TOMINISTRATO Manager, Aircraft Certification Division Southwest Region (Title)

47.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) - (Address of grantor) (Number and street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**FAA AC 69-5536**

## Every issue (1)

- July 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2b/93/2b93fdeb7ef458a3155588daf60609fef4c8205a8952d6b505da49709138c587)

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