# STC SA3149SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitcnell Automatic Flight System Model AK536 consisting of a Century IV
Autopilot or Model AK536FD consisting of a Century IV Flight Director Autopilot with
Optional Remote Annunciator
- Applied: June 24, 1976
- Status date: June 6, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A6CE](https://openairdocs.org/tcds/A6CE)
- Certificate PDF: https://openairdocs.org/files/sha256/b0/78/b078b54a771353784bfd3207b47225c87b6d58999d4f0bf58b52a1dcb6856632
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3EADF2F2BCCB554185256CC2000A947C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3149SW-D

## ADs that name it (0)

None.

## Approved models (5)

- Textron Aviation Inc. 337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. 337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Textron Aviation Inc. T337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))

## 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.

Bcpartmcnt of transportation -federal aoiation administration Supplemental t^pe Certificate SA3149SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Bpx 610 Mineral Wells, TX 76067 \s4e^J/Mft>t(e>tvvn&fiMftiu£M'ijyi-dri&,£tiri&£a£eTi&<a^^ Federal Aviation.-lfo,a<i*^^ 23 iSl&aM/a&^nA A6CE Cessna 337E, 337F, 337G, 337H & T337H Installation of Mitcnell Automatic Flight System Model AK536 consisting of a Century IV Autopilot or Model AK536FD consisting of a Century IV Flight Director Autopilot with Optional Remote Annunciator according to Bulletin No. 657, Revision 3, dated 3-6-78 and Master Drawing List No. 87A872, Revision C, dated 3-6-78 (28 Volt System) and/or later FAA Approved Revisions of the above data.

FAA/DAS Approved Supplemental Flight Manuals are required as follows: P/N 68S396-1-S, dated 3-30-78 is required for Cessna Models 337E, 337F & 337G, S/N 33701463 thru S/N 33701671 P/N 68S674-S, dated 3-30-78 is required for Cessna Model 337G, S/N 33701449 and S/N 33701672 and Up P/N 68S675-S, dated 3-30-78 is required for Cessna Model 337H P/N 68S676-S, dated 3-30-78 is required for Cessna Model T337H and/or later FAA Approved Revisions of the above Supplements. Placard, P/N 13A660-2 is required.

'•aAvl4i>f-j^ifv>vtratAnM///i*>rnMi'n- vns^Zer/MwttvAwr" :0n*ezafo^'-idn&i*u>t&esjea£a0ttAnetr^'Us4in4, -PilatriintAtra/f-r <fdrt* L/,,6 *<*>—/.• 3-30-78; 6-6-84, Revision 2 " ' „„,„/,,/:

*/.U' Don P. Watson Manager, Aircraft Certificatioli Division Southwest Region (TitU)

FAA Fout 1110-2 (10-61)

INSTRUCTIONS: The iraiufcr endorsement below may be used to notify the appropriate FAA Regional Office of the tranifer of thU Supplemental Type Certificate.

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

TRANSFER ENDORSEMENT Transfer Ac ownership of Supplemental Type Certificate Number to (Name of transferee) ———-————-—————— (Address of transferee) —————— (Mumka tnd strut) from (Name of grantor) (Print or type).

(Address of grantor) iettj (Citf. Suit, tnJ ZIP <•& I Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 6, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b0/78/b078b54a771353784bfd3207b47225c87b6d58999d4f0bf58b52a1dcb6856632)

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