COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Rolls Royce Turbine Engines - Spey Series AD/RRT-S/4 Amdt 1 H.P. Fuel Shut Off Valve Primary Strainer - Inspection 5/78 Applicability: Spey 511-8 engines fitted with HP shut-off valves featuring Lucas SB LSB Sp 73- 158 but not fitted with H.P. fuel pumps featuring either LSB Sp 73-127 or LSB Sp 73-212. Requirement: Rolls Royce Spey SB No. Sp 73-182. Compliance: As detailed in the requirement document.