COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series AD/TFE731/3 Amdt 1 H.P. Turbine Blade P/N 3072111-1 - Replacement 4/86 Applicability: TFE 731-2-1C; -2-2B fitted with turbine blades P/N 3072111-1. Requirement: Garrett S.B. TFE 731-72-3026 Rev 10. Note: Equipment modified I.A.W. a previous issue of this Directive may require further rework. Compliance: Before exceeding 1000 hours time in service. Background: This Directive is amended to reflect the manufacturers latest revision 10 to the Requirement Document which recommends no mixing of 3072455-10 blades with -9 or -12 and references S.B. TFE 731-72-3219 for turbine rotor assembly identification.