COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Rolls Royce Turbine Engines - RB211 Series AD/RB211/6 Amdt 4 Low Pressure Compressor Rotor (Fan) Axial Retention 9/87 Applicability: RB211-524 series engines and modules as listed in Rolls Royce SB RB211-72-6576 R7. Requirement: Rolls Royce SB RB211-72-6576 Rev 7. Note: FAA AD 82-12-05 Amdt 39-4398 refers. Compliance: In accordance with the Requirement Document. Background: This Directive has been amended to reflect the manufacturers latest revision to the Requirement Document. This revision amends the engine models and modules effectivity listing.