STC ST00072WI-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST00012W1-D This certificate issued to: Duncan Aviation Inc.

3701 Aviation RD Lincoln, NE 68524 Certifies that the change in the type design for the following product with the linitations and conditions therefere as specified hereon meets the airvertliness reyuirervents of Part Ab of the Civil Air Pegulationd.

Original Product --Type Berlificate Nuber: A12EA Make: Gulfstream American Moodel • G-1159, G-1159A, G-1159B Description of Type Design Change: Installation of a Sundstrand Mark VII Ground Proximity Warning System. Data Required:

(1) Duncan Aviation, Inc., Document List No. 10042100, Revision A, dated June 3, 1993, (2) Duncan Aviation, Inc., Document No.

40137200, FAA Approved Airplane Flight Manual Supplement, dated June 5, 1993, or later FAA Approved Revisions to (1) or (2).

Limitations and Conditions: This approval should not be extended to other specific airplanes of this model of which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any other those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

suspended, revsked or a terination date is herwise estallished by the Administrater of the Frederal Aviation Administration Date of Application: April 30, 1993 Date Reissued: October 27,2009 Tute of inunce: June 5, 1993 Date Amended: August 2, 1994 FEDERAL AVIATION Pho Administrator (Signature) P. Mike Chick Jr.

TOMINSTRATO DAS Administrator, DAS-501013-CE Duncan Aviation, Lincoln, Nebraska (Title)

FAR FORM 8110-2-1 (10-69) PAGE 1 Of 2 PAGES Fred in accordance with FAR 21.47.