COMMONWEALTH OF AUSTRALIA CIVIL AVIATION ORDERS CIVIL AVIATION SAFETY AUTHORITY PART 105 SCHEDULE OF AIRWORTHINESS DIRECTIVES GULFSTREAM (GRUMMAN) G.159 SERIES AEROPLANES AD/G159/10 Installation of Accessory Gearbox Generator Baffle and Supercharger Drain Line Applicability: All models with S/Nos. 1 to 12, 14 to 86 and 114. Document: Grumman Service Change No. 139. 4/67 Note: Installation of the baffle between the DC generator and the generator adapter as called up in Part 1 of the above Service Change need not be carried out if Dowty Rotol Modification GB1843 is incorporated.