# STC SA3415SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century automatic flight system kit No. AK918/FD consisting of Century 41 autopilot/flight director.
- Applied: October 18, 1985
- Status date: May 1, 1996
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/97/6e/976e50ce1043f277ea43497e80000a1227660a4c9d003814070a10ae7a9bca1c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A010CE2A0896632E85256CC2000A97D4.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3415SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 414A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- Cessna Aircraft Company 421C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA34155W-D This certificate issued to: Century Flight Systems, Inc.

3003 FM 1195 P.O. Box 610 Mineral Wells, TX 76067 Part 3 of the Civil Aeronautics Regulations.

Original Product Jype Certificate Number: AICE Make: CESSNA Model: 414, 414A, 421C Description of Type Design Change: Installation of a Century Automatic Flight System, Kit No.

AK918/FD, consisting of a Century 41 Autopilot/Flight Director per Bulletin No. 1049, dated 09-28-82, Rev.

A, dated 07-31-92 and Master Drawing List No. 87A1127, dated 09-28-82, Rev. A, dated 07-31-92 (28 Limitations and Conditions: FAA/DAS approved Supplement to Pilot's Operating Handbook and/or Airplane Flight Manual Supplement P/N 68S1054, dated 10-15-82 Rev. 1, dated 08-25-92 is required for Cessna Models 414, 414A, 421C.

Also eligible on Cessna Model 414A when modified by STC SA8125SW, STC SA4943SW, and STC SA4546SW. Also eligible on Cessna Model 421C when modified by STC SA5811SW. Century Yaw Damper, Kit No. YK580, STC SA3111SW-D or YK999, STC SA3492SW-D is compatible with, but not required by, this modification.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

2; 05-01-96, Rev. 3 By Direction of the Administrator FEDERAL AVIATIO Arela l Satron (Signature) TAMINISTRATO William R. Watson DAS Staff Coordinator DAS 7 SW (Title) 47

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

(Address of transferee) (City. Stale, and 2IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and streel ;

(City, Stake, and ZIP code 1 Extent of Authority (if licensing agreement):

Signature of grantor (In ink): - +11+r.01: 1090-862-030

## Every issue (1)

- May 1, 1996: Amended, Current. [certificate](https://openairdocs.org/files/sha256/97/6e/976e50ce1043f277ea43497e80000a1227660a4c9d003814070a10ae7a9bca1c)

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