COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES AD/G159/11 Amdt 1 Engine Mount Chafing 11/97 Applicability: All models Requirement: In accordance with Grumman Gulfstream Service Change 180: 1. Inspect the applicable engine mount trusses, and b. Install chafe guard Part Number 159WP10017-11 Note: FAA AD 97-14-13 refers Compliance: Unless already accomplished, before the issue of an Australian Certificate of Airworthiness, thereafter inspect the chafe guard at intervals not exceeding 2 500 hours time in service. This directive has effect from 9 October 1997. Background: This directive provides terminating action for a short time repetitive inspection in the FAA AD.