"Maybe if they try reinitializing the entire system from main engineering?"

I am going to main engineering to disable this vessel.

I'll have to go down to main engineering to get a better look at the problem.

"I've got to get some equipment from main engineering," she told him.

The aliens have taken over main engineering and are spreading out.

Even the temperature in main engineering had returned to normal.

"Have them report to me immediately in main engineering."

Less than two minutes after he'd left the bridge, Spock entered main engineering.

They expect to have main engineering cleared in less than an hour.

It was just the three of them in main engineering, had been since lunch.