# STC SA3138SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK612, consisting of Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler.
- Applied: May 10, 1976
- Status date: June 5, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 5A4](https://openairdocs.org/tcds/5A4)
- Certificate PDF: https://openairdocs.org/files/sha256/bf/d2/bfd285c0e1fb73f41286daa9425e56b33e0174fe05596986d4126d197a7d27fe
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/82734A44C946C34885256CC2000A9457.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3138SW-D

## ADs that name it (0)

None.

## Approved models (5)

- Beechcraft Corporation D50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Beechcraft Corporation D50A ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Beechcraft Corporation D50B ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Beechcraft Corporation D50C ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Beechcraft Corporation D50E ([TCDS 5A4](https://openairdocs.org/tcds/5A4))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

United &tatu of amrrira Bcpartmcnt of Itransportanon - federal atoiation administration Supplemental t:gpe Certificate SA3138SW-D Century Flight Systems, Inc.

P. 0. Box 610 Mineral Wells, Texas 76067 i^rw^iySi&defas^i^^'^^fe dw&?n4&i£4>w&JaMd4^ tdZ444wm&m4A/ ^^t^a^f 3 ^a^0*^ £J J[^ j| ^ fJrtatrLa/diwauc/——•^' Beech D50, D50A. D50B. D50C, D50E , d<l//yAe>^( ^eAj&n ~&Aa>n.ae':

Installation of Mitchell Automatic Flight System Model AK612 consisting of a Century III Autopilot with Optional Radio Coupler and Glide Slope Coupler according to Bulletin No. 738, Revision 2, dated 1-29-79 and Master Drawing List No. 87A860, Revision B, dated 1-29-79 (28 Volt System) and/or later FAA approved revisions.

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S381, dated 5-17-76 is required for Beech Models D50C and D50E and/or later FAA approved revisions.

Placard P/N 13A660 is required.

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

&*a>nd.Jfa'Afyifu>f&vwda^MS^ ^ SXcfrri^ru^^a^r-^^Ae' 5-10-76 L^^^u^: 1-27-77; 2-5-79; 6-05-84 Revision 3 5—17—76 (Signature) (Titlt)

FAA taut Si 10-2 (1O-68)

,NSTRUCTIONS: The transferendowment below may be used ,o notify the appropriate FAA Regional Office of the transfer of thii Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the traniferce and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Ortificate Number to (Name of transferee)_ (Address of transferee). I ,Vum&rr *nd ttrttt) from (Name of grantor) (Print or type).

(Address of grantor) (Cit,, SUU.

Signature of grantor (In ink):

ii < <-. o n «••«-««»•'""

## Every issue (1)

- June 5, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bf/d2/bfd285c0e1fb73f41286daa9425e56b33e0174fe05596986d4126d197a7d27fe)

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