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/7 No. 3 Bearing Breather Temp Check and Replacement of Main Bearing Breather Tube Steel Elbow 10/76 Applicability: JT9D-3A, -7, -7A, -7H, -7AH, -7F and -20 turbofan engines incorporating labyrinth solid land seals P/Nos. 589733, 589741, 647189 or 729774. Document: 1. FAA AD 76-20-03 : Amendment 39-2731; or 2. AD/PW-T/37. Compliance: As detailed in the Requirement Document.