# STC SA3373WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: W Morgan Hetrick, United States
- Description: Installation of Hydro-Aire power brake/skid control system.
- Applied: February 25, 1977
- Status date: June 4, 2004
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A27CE](https://openairdocs.org/tcds/A27CE)
- Certificate PDF: https://openairdocs.org/files/sha256/f9/d4/f9d4c8fd9c0c30afa9d016b5e47cb01e69044c1ceb2bd78ce32dfb77ff5af556
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E488C7E06D44729186257DB60065EE59.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3373WE

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 501 ([TCDS A27CE](https://openairdocs.org/tcds/A27CE))

## 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.

Part 23 of the Federal Aviation R egulations. (For certification basis, see T.C. Data Sheet A27CE)

Original Product Type Certificate N umber :

Installation of Hydro-Aire Power Brake/Skid Control System in accordance with FAA sealed Aviation Brake Systems, Ltd. Drawing No. AB31004, Revision “E” dated July 30, 1976, or later FAA sealed revisions. FAA approved Aviation Brake Systems, Ltd. Airplane Flight Manual Supplement No. ABS-2 dated March 30, 1977, or later FAA approved revisions are required with this modification.

The approval of this change in type design applies only to the aforementioned aircraft. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

W. Morgan Hetrick, an Individual 288 Heifer Creek Road Springfield, AR 72157 A27CE M ake : Cessna M odel : 501 Date of application : February 25, 1977

Date of issuance : March 30, 1977

Date reissued : June 04, 2004

B y direction of the A dministrator

(Signature) S. Frances Cox, Manager Special Certification Office, Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number SA3373WE Date of Issuance: March 30, 1977

## Every issue (1)

- June 4, 2004: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f9/d4/f9d4c8fd9c0c30afa9d016b5e47cb01e69044c1ceb2bd78ce32dfb77ff5af556)

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