COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES General Electric Turbine Engines - CT58 Series AD/CT58/12 Lube and Scavenge Pump 9/85 Applicability: CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1 and CT58-140-2. Document: General Electric Alert SB (CT58) A72-157; or AD/GE-T/34 Compliance: As detailed in the requirement document.