If it as you say a propellor failure it would be interesting to know the history of the prop, at this stage in the fleet life it is unlikely that this was a new propellor and I would guess that due to the propellor overhaul life the the age and number of times the propellor has been overhauled it is unlikely that the propellor age matches the airframe life.
I am sure that there are people looking into this to find if there is a common thread. Having used a few overhaul agency's in the UK for composite propellor work we have always found that the factory in Germany is better value for money in terms of quality vs price.