Not sure of the specific cause but imho airlines and other maintenance facility's must be feeling the pinch in today's financial climate and, dare I say it, may be looking at cost cutting in certain areas such as maintenance?? Its a very sensitive subject but I for one work for a company which has recently extended the periodicity of its servicing cycles on its aircraft. The incidents over the past few weeks may just be a coincidence but it raises a few questions in some minds, including my own.
Hope I'm mistaken