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I came across this sentence in a book:

Until the machinery has been installed, the plant wasn't able to begin production.

Is this grammatically correct?

I think the first clause should use either the simple past or the past perfect, because it talks about something in the past:

Until the machinery had been installed / was installed, the plant wasn't able to begin production.

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These are all correct alternatives to your original sentence

Until the machinery was installed, the plant wasn't able to begin production.
Until the machinery had been installed, the plant wasn't able to begin production.

Until the machinery has been installed, the plant won't be able to begin production.

Until the machinery is installed, the plant will not be able to begin production.

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