Uncontained failure
Firstfloor. By definition an "uncontained" failure is one where part of the engine which has failed is not contained within the engine casing. Clearly, the failure suffered by QF32 was an "uncontained" failure of rotating members of the engine. These engines are a triple spool type. i.e. the Fan section is supported on a shaft driven by its own turbine assembly. Likewise for the Intermediate compressor and the High Pressure Compressor. A failure of any one of the rotating members of the engine will, among other things, cause severe vibration which in turn often leads to secondary failures. Lets wait until the engineers have time to determine the primary failure and what followed. Rolls Royce will be very anxious to determine the cause of the failure and to take whatever remedial action is required to prevent further failures, and they will do so.