STC SA00832SE

Number SA00832SE This certificate, issued to Micro AeroDynamics, Inc.

4000 Airport Road, Suite D Anacortes, WA 98221 Part 3 of the Civil Air Regulations.

Original ProductType Certificate Number: A-799 Make: Cessna Model: 170A and 170B

Description of the Type Design Change: Installation of vortex generators on the wings and tail surfaces of the above model aircraft in accordance with Micro AeroDynamics Drawing Package MA2143, Revision IR, dated May 31, 2000, and Installation Manual MA2144, Revision IR, dated June 6, 2000, 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 ba sis for approval 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: May 31, 2000 Date reissued:

Date of issuance: August 4, 2000 Date amended:

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