STC SA4172NM

Number SA4172NM This certificate, issued to Aviation Development Corporation 1305 NW 200th Street Seattle, WA 98177

Part 23 of the Federal Air Regulations. dated February 1, 1965, and Amendments 23-1 through 8.

Original ProductType Certificate Number: See attached Approved Model List (AML) Make: No. SA4172NM for list of approved airplane Model: models and applicable airworthiness regulations.

Description of the Type Design Change: Installation of Aviation Development Corporation’s oil filter in accordance with Aviation Development Corporation Drawing List as shown on the attached AML.

NOTE: For those aircraft with engines requiring an oil filter adapter, the engines must be modified per STC SE5743NM.

Limitations and Conditions: Approval of this change in type design applies to the list of models of 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, AML No. SA4172NM, and FAA Approved Flight Manual Supplement must be maintained as part of the permanent records for the modified aircraft.

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: June 2, 1987 Date reissued:

Date of issuance: February 9, 1988 Date amended: 5/17/88; 7/8/88; 8/18/88; 2/24/88;

9/15/89;1/29/90; 7/20/92; 7/29/92;

10/11/94

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