STC SA3247NM

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA3247NM This certificate issued to: Western Skyways Aircraft Modifications 333 West Boulevard, Suite 400 Rapid City, SD 57701 Part 3 of the Civil Air Regulations Effective May 15, 1956.

Original Product Make: Textron Aviation Inc.

Type Certificate Number: A4CE Model: TU206C, D, E, F, G, S/N U206-0915 thru U20606921 & up Description of Type Design Change: See page 3 of this Supplemental Type Certificate (STC) for the description of type design change.

The approval of this change in type design is restricted to the Cessna TU206 series aircraft equipped with factory installed turbochargers that are otherwise unmodified. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that 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 approval is not applicable to Cessna TU206 airplanes equipped with air conditioning units.

The ST's supporting documentation (drawings.

instructions, specifications. flight manual supplements, ete.) is the property of the STC holder. An STC holder who allows a person to alter an aircraft, aircraft engine, on propeller must provide that person with written permission acceptable to the FAA: (Ref. 14 CFR 21120).

FAA Form 8110-2 (6/20) SUPERSEDES PREVIOUS EDITION

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA3247NM Date of Application: January 2, 1986 Date of Issuance: April 18, 1986 Date Reissued: June 20, 1996; September 6, 1996; May 28, 2002; August 27, 2002; May 20, 2019 Date Amended: May 19, 1996, March 8, 2023.

Description of Type Design Change: (Cent.):

Installation of an air-to-air intercooler in the engine induction system downstream of the turbocharger per aircraft portion of Riley International Master Drawing List R-16801, Revision "A", dated April 18, 1986, or later FAA approved revisions. STC SE3248NM is required as part of this installation.

For TU206G, S/N U20603522 through U20604649, Riley International Corporation Supplemental Airplane Flight Manual (AFM) No. 1, dated April 18, 1986, or later FAA approved revisions is required.

For TU206G, S/N U20604650 thru U20606921, Riley International Corporation Pilots Operating Handbook and FAA AFM Approved Supplement No. 1 to Cessna Model TU206G Airplane POH- AFM, dated April 18, 1986, or later FAA approved revisions is required.

For TU206C, D, S/N U206-0915 TO U20603521, SUPPLEMENTAL AIRPLANE FLIGHT MANUAL (AFMS) No. 2, dated January 5, 2024, or later FAA approved revisions is required.

For TU206E, F, S/N U206-0915 TO U20603521, SUPPLEMENTAL AIRPLANE FLIGHT MANUAL (AFMS) No. 3, dated January 5, 2024, or later FAA approved revisions is required.

-END- Possession on this Supplemental Type Certificate (STC) document by persons other than the STC holder does not constitute rights to the design data nor to alter an aircraft, aircraft engine, or propeller. An STC holder who allows a person to alter an aircraft, aircraft engine, or propeller must provide that person with written permission acceptable to the FAA. (Ref. 14 CFR 21.120).

FAA Form 8110-2 (6/20) SUPERSEDES PREVIOUS EDITION Page 3 of 3