COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES
GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES
AD/G159/9 Lower Centre Section Skin - Inspection 12/67
All models.
Remove the lower centre section fairings P/Ns 159 W10400-121 and 159-W10401- 121 and inspect the wing planks for corrosion. If corrosion is found, repair the wingplanks in accordance with a scheme approved by the Secretary before further flight.
Before 1 April 1967 and thereafter at intervals not exceeding 6 months.