Train 2 was shut down in May for crews to carry out modifications already implemented at the other two trains, with work focused on remedying vibration problems.
Chevron has developed the Gorgon and Jansz-Io gas fields, located within the Greater Gorgon area, between 130 and 220 km off the northwest coast of Western Australia.
The project is a joint venture of the Australian subsidiaries of Chevron (approximately 47 per cent), ExxonMobil (25 per cent), Shell (25 per cent), Osaka Gas (1.25 per cent), Tokyo Gas (1 per cent) and Chubu Electric Power (0.417 per cent).