STC SA02365AK

This certificate issued to BTB Aeroproducts, LLC 4341 Stetson Ave.

Rosamond, CA 93560

Part 3 of the Civil Air Regulations

Original Product — Type Certificate Number: A-799 Make: Cessna Model : 170A, 170B

Description of Type Design Change: Manufacture and installation of a carbon composite engine cowling in accordance with R. J. Waldmiller Drawing P108-RJW20040512, Revision IR, dated May 12, 2004, or later FAA approved revisions.

1. Approval of this change in type design applies to the aircraft models listed above 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.

2. A Lycoming 0-360 engine must be installed in accordance with a separate approval.

3. A copy of this Certificate must be maintained as part of the permanent record of the modified aircraft.

4. For Instructions for Continued Airworthiness, reference BTB Aeroproducts, LLC, Installation Instructions and Instructions for Continued Airworthiness, Revision A, dated January 15, 2010, or later FAA accepted revisions.

5. 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: June 3, 2004 Date reissued: March 4, 2010 Date of issuance: February 23, 2010 Date amended:

( Signature) August A. Asay Manager, Anchorage Aircraft Certification Office

( Title)