By now analysis pouring in from various channels points out the probability of engine failure.It means Pilot error is ruled out.So definitely the engine maintenance responsibility is upon the technical staff of air india and by looking at it's notorious past records ,Boeing has a major role to play in each crash till now.We have to wait a bit more till the final investigation report is released.Once it is proved that it's because of sheer negligence/or low quality standards of the dreamliner's engine,we will consider this tragedy as a planned mass murder by the service providers.Killing 265 innocent souls is not a joke.