Emirates A380 engine shutdown due to nozzle failure - ATSB

The Australian Transport Safety Bureau (ATSB) has confirmed the cause of an engine failure on an Emirates A380 between Sydney and Dubai was due to the failure of a high pressure turbine (HPT) nozzle on the Engine Alliance (EA) GP7270 powerplant.

The incident happened on 11 November 2012. Reports at the time said the crew heard a loud bang shortly after take-off at approximately 9,000ft (2,740m), followed by an engine no.3 exhaust gas temperature over-limit warning and an uncommanded engine shutdown..
The ATSB said in its report that the incident was the result of the break-up and dislodgement of some stage 2 HPT nozzles, producing substantial downstream damage, and allowing a breach within the turbine casing walls.
EA had already made design changes to the nozzles before the Emirates incident but ATSB found the design cooling characteristics of the stage 2 nozzle components were inadequate to deal with higher than expected metal surface temperatures.
Emirates has since installed new nozzles on its fleet of A380s and EA said that most aircraft across the global A380s aree now fitted with the replacement nozzles. EA has also enhanced the trend monitoring system to receive alerts earlier should there be a change in exhaust gas temperature.