STC SA02169NY

Northern Aviation Maintenance Hangar #2 RR #1 Fort Nelson, British Columbia Canada V0C 1R0 This certificate issued to:

Part 23 of the Federal Aviation Regulations.

Original Product -- Type Certificate Number : A16CE , A4CE Make : Cessna 206, 207, 207A, U206A, U206B, U206C, U206D, U206E, U206F, U206G (Non-Turbo-Charged Only) Model :

Installation of Cessna 206/207 Secondary Heat Muffler manufactured to Acorn Welding Manufacturing Control Process NAM-0301.

1. Installation on Cessna 206 to U206G (Non-turbo-charged) in accordance with Karvonen Consulting Engineering Order EO – NAM-0301-1A, Revision 1, dated October 14, 2004, or later Transport Canada approved revision is required for this installation.

2. Installation on Cessna 207, 207A (Non-turbo-charged) in accordance with Karvonen Consulting Engineering Order EO –NAM- 0301-1B, Revision 1, dated October 14, 2004, or later Transport Canada approved revision is required for this installation.

3. Operation in accordance with Northern Aviation Maintenance Airplane Flight Manual Supplement (AFMS) NAM-0301-1- FMS, Revision 1, dated October 14, 2004, or later Transport Canada approved revision is required for this installation.

4. Installation on Cessna 206 through U206G/207 and 207A Series (non-Turbo-Charged Models only) in accordance with Instructions for Continued Airworthiness NAM-0301-ICA, Rev. 2, dated October 14, 2005.

5. Compatibility of this design change with previously approved modifications must be determined by the installer.

6. If the holder agrees to permit another person to use the 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 approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

( Signature) Anthony Socias Manager New York Aircraft Certification Office

(Title) Date of application : August 31, 2005

Date of issuance : October 31, 2005