I'm absolutely astonsihed to see copies of the flight/maintenance log published here, this is company-confidential stuff at the best of times but when related to an accident it seems utterly beyond belief. Although it is illuminating to us it must be causing the company and particularly the engineer/s involved considerable anguish to have thos sort of info and identification published.
I hate to think what will happen to who dunnit if/when caught. Doubtless he had a motive and it may well be a valid one if his beef is about maintenance or operational standards but it's a pretty extreme action to take.
Having gone this far he might do well to voice his beef here and at least remove any speculation about his motives or his take on the significance of these documents.