# STC SA5101NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: D'Shannon Products Ltd., United States - Description: Installation of vortex generators on wings and vertical tail. - Applied: October 25, 1990 - Status date: June 14, 2012 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25) - Certificate PDF: https://openairdocs.org/files/sha256/49/76/4976d0823519a93090ad8bf967d6e96ff5d542d2b31e5179ac467dbb151132fc - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5D6BE7094785DD1986257A3700665FDE.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5101NM ## ADs that name it (0) None. ## Approved models (3) - Cessna Aircraft Company 335 ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Cessna Aircraft Company 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Cessna Aircraft Company 340A ([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. United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number SA5101NM This certificate, issued to: D’Shannon Products, Ltd. 1309 County Road 134 Buffalo, MN 55313 Part 3 of the Civil Air Regulations. Original Product -- Type Certificate Number: 3A25 Make: Cessna Model: 335, 340, and 340A Description of the Type Design Change: Installation of vortex generators on wings and vertical tail in accordance with Drawing List DL-110, dated November 5, 1990, or latter 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 this model on which other previously approved modifications are incorporated unless it is determined 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, dated December 7, 1990, and Flight Manual Supplement dated November 18, 1991, must be maintained as part of the permanent records for the modified aircraft. Date of application: October 25, 1990 Date reissued: November 22, 2011, June 14, 2012 Date of issuance: December 7, 1990 Date amended: November 18, 1991 Timothy Smyth (Signature) Timothy Smyth Manager, Propulsion Branch Chicago Aircraft Certification Office (Title) ## Every issue (2) - June 14, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/49/76/4976d0823519a93090ad8bf967d6e96ff5d542d2b31e5179ac467dbb151132fc) - November 18, 1991: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/5f/42/5f4291ef5f8993ccd8d35520100d640cf96ffe22dda91f2fd3472c58bd34ddc5) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.