MELBOURNE, June 7 (Reuters) -
* Chevron says planned modifications on Gorgon Train 2 completed safely.
* Chevron, operator of the Gorgon LNG plant off Western Australia, idled the second production unit in May to carry out modifications already made on the other two units.
* Work was focused on remedying vibration problems, traders had said. (Reporting by Sonali Paul; editing by Richard Pullin)