STC SA3801NM

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA3801NM This certificate issued to: American Aviation, Inc.

10555 Airport Drive Coeur d'Alene Airport Hayden Lake, ID 83835 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness requivements of Part 3 of the Civil Air Regulations, effective May 15, 1956.

Original Product -Type Certificate Number: ASEA Make: Piper Model: PA-31P Navajo Description of Type Design Change: Installation of American Aviation, Inc., intercooled engines as modified by Supplemental Type Certificate (STC) SE3800NM in accordance with American Aviation, Inc., Report 89-1 or later FAA approved revision.

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 of these models 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. A copy of this Certificate and FAA Approved Airplane Flight Manual Supplement 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.

Date of Application: December 29, 1986 Date Reissued:

Date of Issuance: March 13, 1987 Date Amended: November 1, 1998 FEDERAL AVIATION Bu vairect edveans (Signature) * OMINIST RATION Acting Manager, Seattle Aircraft Certification Office (Title)