# STC SA00668SE - Type: Supplemental type certificate - Status: Current, Amended - Holder: Micro AeroDynamics Inc, United States - Description: Installation of vortex generators on the wing leading edge and underside of the horizontal stabilizer. - Applied: October 1, 1998 - Status date: June 12, 2009 - Product: Aircraft, Single-Engine - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A22NM](https://openairdocs.org/tcds/A22NM) - Certificate PDF: https://openairdocs.org/files/sha256/b7/c8/b7c84ecb54d45ac7d097aaa7d01ab96365b494c7f92fb087decf2cd8d08199fb - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5AD3DFCE5429C2FC862575D7004F1A37.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA00668SE ## ADs that name it (0) None. ## Approved models (5) - Sky International Inc. A-1 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1A ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1B ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1C-180 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) - Sky International Inc. A-1C-200 ([TCDS A22NM](https://openairdocs.org/tcds/A22NM)) ## 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. Number SA00668SE This certificate, issued to Micro AeroDynamics, Inc. 4000 Airport Road, Suite D Anacortes, WA 98221 Part 23 of the Federal Aviation Regulations. Original Product ⎯Type Certificate Number: A22NM Make: Aviat Model: Husky A-1, A-1A, A-1B, A-1C-180, A-1C-200 Description of the Type Design Change: Installation of vortex generators on the wing leading edge and underside of the horizontal stabilizer, in accordance with Micro AeroDynamics Drawing List MA2089, Rev B, dated May 8, 2009, and Installation Manual MA2090, Rev B, dated May 8, 2009, or later FAA approved revisions. NOTE: If more than five vortex generators are damaged or missing, the aircraft is not airworthy. 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 on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. Additionally, if more than 5 vortex generators are damaged or missing, the aircraft is not to be considered airworthy. A copy of this certificate must be maintained as part of the permanent records for the modified 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. This certificate and the supporting data which is the basis for a pproval shall remain in effect until surrendered, suspended, revoked, or a termination date is otherwise established by the Administrator of the Federal Aviation Administration. Date of application: October 1, 1998 Date reissued: Date of issuance: February 17, 1999 Date amended: October 15, 1999, June 12, 2009 (Signature) Manager, Seattle Aircraft Certification Office (Title) ## Every issue (1) - June 12, 2009: Amended, Current. [certificate](https://openairdocs.org/files/sha256/b7/c8/b7c84ecb54d45ac7d097aaa7d01ab96365b494c7f92fb087decf2cd8d08199fb) --- 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.