# STC SA523SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Mitchell Industries, Inc, United States
- Description: Installation of Mitchell Automatic trim system AK165.
- Applied: May 21, 1965
- Status date: May 28, 1965
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- Certificate PDF: https://openairdocs.org/files/sha256/0b/8a/0b8ab6a86ca8e06d27751f2cf9d0c84546b28498868e98fed34b12551b0dbf86
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1F4A1BF51D5DC95986257E75004E5A5B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA523SW

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-23-235 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

## 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**

NAME AND ADDRESS OF APPLICANT Mltchell Industries, Inc.

Municipal Airport P. O. Box 610 Mineral Wells, Texas 76067

DESCRIPTION OF CHANGE Installation of Mttchell Awtomatl Mitchell Industries, Inc. Bulled subsequent F. A, A. approved bu

WILL DATA BE AVAILABLE FOR SALE OR RELEASE TO WILL PARTS BE MANUFACTURED FOR SALE (K»f. CAR

SIGNATURE AND TITLE OF APPLICANT May 21. 1965

**DATE OF APPLICATION 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:

Ijg 1 AIRCRAFT 1 1 ENGINE L J PROPELLER

ORIGINAL MODEL DESIGNATION Piper PA*21.21Sr PA. 23 .2 SO NEW MODEL DESIGNATION (If demired) Ic Trim System Model AK 165 per la No. 2S0 dated May 21, 1965 and Lletins and/or supplements.

OTHER PERSONS? [jgl YES Q NO

1.55)7 §£] YES [ "1 NO /flf^s ^2?L.

Vica President TITLE h*«lW«...

6. To be Competed by FAA

NATURE AND LOCATION OF DATA Data listed in itea 3 above on file at SW-210, Bafereaee Project: Hone Applicable regulation*: Sea* as original certification.

ORIGINAL tYPE CERTIFICATE NO. FAA AP 1A10 SUPPLEMENTAL TYPE CERTIFICATE NO.

SA523SW

DATE OF APPROVAL Cbi */2oV63 =ROVAL (fytfiZfrr ^ZfiL/^/fct^ _

SI GNATURE ef , Engineering and Manufacturing Vr< inch Tl TLE * U.S. GOVERNMENT PRINTING OFFICE : 1959 O—509657 FORM FAA-2417 (5-59)

## Every issue (1)

- May 28, 1965: Issued, Current. [certificate](https://openairdocs.org/files/sha256/0b/8a/0b8ab6a86ca8e06d27751f2cf9d0c84546b28498868e98fed34b12551b0dbf86)

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