What was found
(AUS) APU FAILED - DEBRIS EXITING FROM EXHAUST - INVESTIGATION FOUNDTHAT THE TURBINE WHEEL AND SHAFT ASSEMBLY FAILED AND HUB SEPARATED DUE TO `HAFNIUM INCLUSION'
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(AUS) APU FAILED - DEBRIS EXITING FROM EXHAUST - INVESTIGATION FOUNDTHAT THE TURBINE WHEEL AND SHAFT ASSEMBLY FAILED AND HUB SEPARATED DUE TO `HAFNIUM INCLUSION'