Shaun / Sean Murphy ran an operation in Western Australia. He was well known for his lack of interest in rules and laws, and his R-22 had an unknown number of real hours, although the log books showed something less than 2000. One day a rotor blade let go, his passenger escaped, but Murphy met his fate.
Later metallurgical examination of the blade showed that a crack had started several thousand starts ago, and propagated through the blade until it faled. The main reason for the crack moving along was Murphy - his clutch motor had failed while on and would not disengage, so he would start the engine with the rotor engaged - the sudden starts caused the crack to move a bit more each time. But it was also determined that the blade was at least 2500 hours old.
Or that is pretty close to the real story.