COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Hydraulic Equipment AD/HYD/1 Sprague Engineering Hydraulic NK Accumulator - Modification Applicability: All Sprague Engineering Accumulator assemblies P/N A-200-25 and A-200-50 not fitted with steel end caps. Document: 1. Sprague Engineering Mod. Bulletin No. 2; or 2. FAA AD 70-10-4. Compliance: Components with 15,000 hours or more total time in service at 30 September 1970 - within the next 1000 hours time in service. Components with less than 15,000 hours total time in service at 30 September 1970 - before completing 16,000 hours total time in service.