The Australian Transportation Safety Board (ATSB) requested assistance in obtaining information from Honeywell regarding the history of TPE331-11U 1st stage turbine blade failures and preventative maintenance action in connection with this failure. The ATSB had determined that the cause of an IFSD of a TPE331-11U-611G engine was a below-platform stress rupture fracture of a 1st stage turbine blade, P/N 3108125-1. 2,327.9 TSO / 2,473 CSO. The National Transportation Safety Board represents the United States in aviation investigations involving overseas interests under the provisions of Annex 13 to the Convention on International Aviation. The investigation is under the jurisdiction of the government of Australia. Further information pertaining to this accident may be obtained from: Australian Transport Safety Bureau (ATSB) P.O. Box 967, Civic Square Canberra A.C.T. 2608 Australia Tel.: (61) 2 6274-6464 (61) 2 6257-4150 E-mail: atsbinfo@atsb.gov.au Fax: (61) 2 6274-6474 AFTN: ASCOYLYX Website: http://www.atsb.gov.au This report is for informational purposes only and contains only information obtained for, or released by, the Government of Australia.