Accident: Qantas A388 near Singapore on Nov 4th 2010, uncontained engine failure
By Simon Hradecky, created Thursday, Dec 9th 2010 16:13Z, last updated Thursday, Dec 9th 2010 16:13Z
The Australian Transportation Safety Board reported, that on Dec 2nd Rolls Royce released a new revision of its non-modification service bulletin (NMSB) 72-G595 defining assessment and engine rejection criteria for the measurement of potential oil feed stub pipes counter-bore misalignment. At the same time the NMSB tightened the compliance time frame from 20 to 2 flight cycles.
Since issue of the NMSB 45 Trent 900 engines have been inspected (standing Dec 8th):
29 engine were installed on operating aircraft
8 engines were not installed on aircraft
4 engines were about to be delivered
4 engines were on a flight test aircraft
Of these 45 engines 3 engines failed the inspection and were removed from service for further examination. All Qantas engines currently flying were found with no defects and remain in service.
The European Aviation Safety Agency has approved software updates to the Rolls Royce engine electronic control units, that is now incorporated into all operating aircraft. The new software version predicts intermediate turbine overspeed events and shuts the engine down before a turbine disk failure occurs.
EVERY 2 FLIGHT CYCLES! The issue still exists!