I read about an accident which almost happened here: http://globalnews.ca/news/3589493/san-francisco-air-canada-taxi-way-runway/
This sentence attracted my attention: "There were a number of aircrafts on the taxiway, who had lights on." Is aircrafts commonly used as a plural in American English?
CB
Aircraft is non-count. "
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Aircraft is non-count. There are other problems with the sentence - "who" referring to a vehicle, and missing "their."