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/11 No. 4 Bearing Compartment 10/78 Applicability: All JT9D engines except those fitted with an annular strainer element in accordance with PWA SB No. 4860. Document: 1. FAA AD 78-16-05: Amendment 39-3274; or 2. Pratt & Whitney Aircraft Alert SB No. 4826; or 3. AD/PW-T/48. Compliance: As detailed in Requirement Document No. 1.