# STC SA00458SE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Aeronautical Testing Service Inc., United States
- Description: Fabrication and installation of vortex generators mounted on wings.
- Applied: January 22, 1997
- Status date: August 7, 1997
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A26WE](https://openairdocs.org/tcds/A26WE)
- Certificate PDF: https://openairdocs.org/files/sha256/ef/f4/eff410a6b2a1c62ba02f041d975f33a399f586402fd78ae7c2b2c59733a81a17
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C63DD64E26918B7585256CC1007DC93B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00458SE

## ADs that name it (0)

None.

## Approved models (4)

- Weatherly Aircraft Company 620 ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))
- Weatherly Aircraft Company 620A ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))
- Weatherly Aircraft Company 620B ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))
- Weatherly Aircraft Company 620TP ([TCDS A26WE](https://openairdocs.org/tcds/A26WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA00458SE This certificate issued to: Aeronautical Testing Service, Inc.

18820 59th Drive NE Arlington, WA 98223 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meet's the airworthiness requirement's of Part 21.25 (a)(1) of the Federal Aviation Regulations and Part 8 of the Civil Air Regulations. See TC Data Sheet No. A26WE for other certification basis.

Original Product -Type Certificate Number: A26WE Make: Weatherly Aviation Company, Inc.

Model: 620, 620TP, 620A and 620B Description of Type Design Change: Fabrication and Installation of vortex generators mounted on the wings in accordance with an FAA approved copy of Aeronautical Testing Service, Inc. Drawing List No. ATS-620B, Revision "A" dated June 24, 1997, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

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 relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

The ATS modification consists of seventy six (76) vortex generators mounted on the wings. If more than six (6) vortex generators are missing or damaged, the aircraft is not airworthy and must be repaired before flight.

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.

Date of Application: January 22, 1997 Date Reissued:

Date of Issuance: July 11. 1997 Date Amended: August 7, 1997 FEDERAL AVIATION By direction he Administrator Id va 20.

TOMNIS TRATION Acting Manager, Seattle Aircraft (Signature) Certification Office (Title)

## Every issue (1)

- August 7, 1997: Amended, Current. [certificate](https://openairdocs.org/files/sha256/ef/f4/eff410a6b2a1c62ba02f041d975f33a399f586402fd78ae7c2b2c59733a81a17)

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