reply to post by kwakakev
On 4 November 2010, Rolls-Royce plc issued non-modification service bulletin (NMSB) 72-G589 that required a series of checks on Trent 900 engines.
On 10 November 2010, Rolls-Royce plc issued alert NMSB 72-AG590, requiring the inspection of Trent 900 series engines for evidence of oil leaks into
specific turbine area components.
On 12 November 2010 at 0700 UTC, Rolls-Royce plc advised that:
Rolls-Royce is now in a position to provide an update on its statement of 8 November concerning the engine failure on the Trent 900 powered A380
Qantas flight QF32 on 4 November 2010.
Immediately following this incident a regime of engine checks was introduced on the Trent 900s to understand the cause and to ensure safe operation.
These have been conducted in parallel with a rigorous examination of all available evidence, including data from the damaged engine and its monitoring
system, analysis of recovered material and interrogation of the fleet history.
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These investigations have led Rolls-Royce to draw two key conclusions. First, as previously announced, the issue is specific to the Trent 900. Second,
the failure was confined to a specific component in the turbine area of the engine. This caused an oil fire, which led to the release of the
intermediate pressure turbine disc.
Rolls-Royce continues to work closely with the investigating authorities.
Our process of inspection will continue and will be supplemented by the replacement of the relevant module according to an agreed programme.
These measures, undertaken in collaboration with Airbus, our Trent 900 customers and the regulators have regrettably led to some reduction in aircraft
availability. This programme will enable our customers progressively to bring the whole fleet back into service.
Safety continues to be Rolls-Royce’s highest priority.
On 18 November 2010, Rolls-Royce plc issued a further NMSB 72-AG590 Revision 2, detailing further Trent 900 engine inspections, including for defects
in a number of turbine area oil and air feed pipes.
On 1 December 2010, Rolls-Royce plc issued NMSB 72-G595 that required the specialised examination, measurement and reporting of the HP/IP bearing
structure stub pipe counter-bore geometry. A 20-flight cycle compliance limitation was specified for the examination.