COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Pratt and Whitney Turbine Engines - JT9D Series AD/JT9D/17 Amdt 2 Fan Containment Shield 8/90 Applicability: JT9D - 7R4D, D1, E, E1, E4, H1 series engines. Requirement: Install an improved fan containment shield in accordance with the requirements of PWA SB No JT9D - 7R4 - 72 - 312 Rev 6. Note 1: Compliance with the requirements of a previous revision of the Requirement document is considered as compliance with the Requirements of this Directive. Note 2: FAA AD 87-23-05 R1 refers. Compliance: At next scheduled engine shop visit, but no later than 31 December 1990. Background: This amendment reflects advice that additional procedures are available which permit alternative methods of installing the improved fan containment shield. These alternative procedures are published in subsequent revisions to Requirement document PWA SB No JT9D-7R4-72-312. Rev 2. Engines already in compliance with the Requirements of CAO 106 AD/JT9D/17 Amdt 1 are considered to be in compliance with the Requirements of this Amendment.