# STC SA409SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Mitchell Industries Inc, United States
- Description: Installation of Automatic pitch trim model AK137.
- Applied: July 9, 1964
- Status date: May 4, 1965
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10), [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/94/1f94099583fea65b3ab024916a5b43d87e27295513bb37ff966775a47ddbb745
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D7E9658E0CC15B6D86257DFC004C4693.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA409SW

## ADs that name it (0)

None.

## Approved models (4)

- Cessna Aircraft Company 310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310L ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 320B ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Cessna Aircraft Company 320C ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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.

**FEDERAL AVIATION AGENCY**

1. NAME AND ADDRESS OF APPLICANT Mitehall Industries, Inc.

Municipal Airport P. 0. Box 410 Mineral W«||»» Taxaa 7406?

**FORM APPROVED, BUDGET BUREAU NO. 04-R015**

**INSTRUCTIONS - SUBMIT IN TRI PLICATE TO LOCAL FAA FLIGHT STANDARDS INSPECTOR.**

**COPY WILL BE RETURNED TO APPLICANT UPON**

**ISSUANCE**

2. SUPPLEMENTAL TYPE CERTIFICATE APPLIED FOR:

|Hj AIRCRAFT 1 1 ENGINE L J PROPELLER

ORIGINAL MODEL DESIGNATION Caiaaa 310L 1101. 320B l> 120C NEW MODEL DESIGNATION (If demired) Nona

3. DESCRIPTION OF CHANGE Installation of Mitchall Industrie*, Inc. Automatic Pitch Trim Modal AK137 par Mitch«ll ladoatrias, Inc. Bullatla No. 241 datad 12.15*64 and »ub§«qu«nt F. A. A.

approvad fcattatiaa *ad/or si»pplamanU.

,>ILV C.ATA BE AVAILABLE FOR SALE OR RELEASE TO

b. WILL PARTS BE MANUFACTURED FOR SALE (Xet. CAK

5. SIGNATURE AND TITLE OF APPLICANT R«ri««d 12*15.64 July 9. 1964

DATE OF APPLICATION OTHER PERSONS? FSl YES 1 1 NO

1.55;? . Lxl YES CH NO x // J /*^~~) <:r~~y^Wrfa^/sZ,. ^2W*«*~~

SIGNATURE Vlc« Pr««id«nt TITLE

6. To be Convicted by FAA

NATURE AND LOCATION OF DATA Data liatad in Ztaa 3 abova, «ad 7X1 A575SWS on f 11. at SW-210.

Applieabla ragulaelon* aaa» a> original eartifieation.

**ORIGINAL TYPE CERTIFICATE NO. FAA APF 3410 & 3A25 SUPPLEMENTAL TYPE CERTIFICATE NO.**

1KI308H OATE OF APPROVAL ^.^ ^

•O~.-,m\mm,Ar 4 /A/. /£ •£ </•avlsad: S/UH/DJ . / 3ROVAL ,^M^L SI GNATURE B. B. Slaughter tiiaf , Bttglnaering and Mawifaetvring Branch Tl TLE * U.S. GOVERNMENT PRINTING OFFICE : I9S9 O—5OT6S7 FORM FAA-2417 (5-59)

## Every issue (1)

- May 4, 1965: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1f/94/1f94099583fea65b3ab024916a5b43d87e27295513bb37ff966775a47ddbb745)

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