You are right, proper usage is "well" there. It's an adverb, describing the way that the machine worked. "Good" is for adjectives, describing people, places o

You are right, proper usage is "well" there. It's an adverb, describing the way that the machine worked. "Good" is for adjectives, describing people, places or things. Sometimes you will hear this mistake in speech (as opposed to written), and this was a quote. Even in speech, unless used for effect, that usage would (for better or worse) mark the speaker as less educated. But if delivered with a bit of a foreign accent, all is forgiven ;-).