COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pratt and Whitney Turbine Engines - JT8D Series AD/JT8D/14 First Stage Compressor Hub Blade Slots 2/84 Applicability: JT8D-9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR. Document: 1. Pratt & Whitney Aircraft Alert SB No. 4841, Revision 6. Note: FAA AD 78-17-02 R2 with subsequent amendments is listed for reference purposes only. or 2. AD/PW-T/47 Amdt 6. Compliance: As detailed in the Requirement Document. Background: This Directive is raised in issue to ensure compliance with the latest revision of the requirement document which adds to the effectivity listing those 'A' series engines that have, or will be, obtained by conversion.