# STC SA3454SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century automatic flight system Model YK959 consisting of a Century yaw damper installation.
- Applied: January 15, 1987
- Status date: January 25, 1987
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/69/13/6913aaadab14896836e0a6ba24f2de1e5c5fca14fd92aeeee941a06a3a61a1eb
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B607849A3D2BF13485256CC2000A983D.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3454SW-D

## ADs that name it (0)

None.

## Approved models (7)

- Cessna Aircraft Company 310N ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company T310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company T310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company T310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10))

## 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.

fcnitrd gtaru of 3mmca Department of'Cransportation—J'eiJeral aoiation administration Supplemental t^pe Certificate SA345ASW-D Flight Systems, Inc.

P.M. 1195 P.O. Box 610 Mineral Wells, TX 76067 in J&e^yfmztA+y'n ff>r- J&e>fc>6tc>u>vng'A*<>etuc£Mri0i ZwJfan4£a&m&M*i&4*m£u&0nA' Jte-*air*v(>r&A>n4M'jfejM*fevn£m/b4#i%avJ 3 d'&er Civil Air 3A10 Cessna : 310N, 310P, 310Q, 310R, T310P, T310Q, T310R wa4' :

Installation of Century Automatic Flight System Model YK959 consisting of a Century Yaw Damper Installation according to Bulletin No. 2015, dated 12-29- 86 and Master Drawing List No. 87A1169, dated 12-29-86 (28 Volt System) and/ or later FAA/DAS approved revision.

': This modification is also for the following applicable models when modified in accordance with STC SA2082WE: 310N, 310P, 310Q, 310R, T310P, T310Q, T310R.

Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual Supplement P/N 68S996, dated 1-05-87 and/or later FAA/DAS Approved revision.

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

^ 1-15-87 1-25-87 '(Signature) William J. Tfiomas DAS Staff Coordinator DAS 7 SW

Tkis ctrtificcti may kt trmsftmd in atarauut with FAR 21.47.

FAA POM I11O-2 (!»-»•)

,NffTRUCTIONS: The .nuufcr endorsement below may be used .o notify .he appropriate FAA Kegio,«l Office of the transfer of ihw Supplemental Type Certificate.

The FAA will reifiue the certificate in the name of the tran.feree and forward it 10 him.

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

(Address of transferee). (Xumbtr *nd street) from (Name of grantor) (Print or type).

(Address of grantor) __ Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- January 25, 1987: Issued, Current. [certificate](https://openairdocs.org/files/sha256/69/13/6913aaadab14896836e0a6ba24f2de1e5c5fca14fd92aeeee941a06a3a61a1eb)

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