# STC SA5790NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: BLR Aerospace LLC., United States
- Description: Vortex generators manufactured
- Applied: November 4, 1992
- Status date: August 23, 2018
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/cb/42/cb42c9ee9e43931dd19106f9385bfbce028ecbce998feae8a11f9f759ae4fd1c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D0A264ABB560548F862582F70063454A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5790NM

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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.

Un ited S tates of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate

Number SA5790NM

This certificate, issued to BLR Aerospace, LLC 11002 29th Ave. West Everett, WA 98204

Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: A20SO Make: Piper Model: PA-31-350

Description of the Type Design Change: Vortex generators manufactured in accordance with Document AA1113, no revision, dated October 28, 1992, and installed in accordance with Document AA1114, no revision, dated October 20, 1992.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for other aircraft.

This approval is limited to the installation in Piper Model PA-31-350 aircraft, Serial No. 31-8253010, R/N N4107V, only. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft.

There may be a maximum combined total of four vortex generators missing from the wing or tail surfaces before replacements must be installed.

Operations must be conducted within the limitations of the basic airplane flight manual .

Date of application: November 4, 1992 Date reissued: November 23, 2009; August 23, 2018 Date of issuance: November 6, 1992 Date amended:

FAA FORM 8110-2 (5/14) PAGE 1 OF 2 PAGES By direction of the Administrator

(Signature)

Manager, Seattle ACO Branch (Title)

## Every issue (2)

- August 23, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cb/42/cb42c9ee9e43931dd19106f9385bfbce028ecbce998feae8a11f9f759ae4fd1c)
- November 23, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a3/04/a3043a7a2bfff0bdaa2d4ebe4ca8d2f09532be96f53796f92d692f7ac6a04343)

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