# STC SA1635SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK417 consisting of Century IV autopilot with trim or AK417/FD consisting of flight director/autopilot with trim.
- Applied: February 27, 1973
- Status date: July 16, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/6a/b2/6ab2165a840965397ab14716234b2a33bc80e5f9fec8cb3a13ccec09497c372d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DA6209BE2CCC54A785256CC1008214CA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1635SW

## ADs that name it (0)

None.

## Approved models (2)

- Beechcraft Corporation 36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation A36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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: SA16355W This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Purt 3 of the CiVi1 Air Regulations:

Original Product -Typebertificate Number: 3A15 Make: Beech Model: 36, A36 Description of Type Design Change: Installation of Mitchell Automatic P1ight System Model AK417 consisting of Century IV Autopilot with Trim or AK417/FD consisting of Flight Director/Autopilot with Trim according to Bulletin No. 540 Revision (4) dated 4-9-74 and Master Drawing List 87A651 Revision G dated 4-9-74.

Limitations and Conditions: FAA Approved Airplane Flight Manual Supplement dated April 19, 1973, revised April 9, 1974, is required for Century IV Autopilot System;

Supplement dated March 29, 1973, revised April 9, 1974, is required for Century IV Flight Director Autopilot System.

Eligible on Serial No. E-571 and below.

Date of Application: February 27, 1973 Jule wissued: 4-9-74; 4-30-75; 7-16-84, Revision 3 Date of Issuance: March 29, 1973 I ate unvended:

FEDERAL AVIATION restrat Don P. Watson (Signature ) OMINISTRAIO 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/sha256/6a/b2/6ab2165a840965397ab14716234b2a33bc80e5f9fec8cb3a13ccec09497c372d)

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