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Marines are investigating potential fault in engines made by Pratt & Whitney
The Pentagon on Thursday said much of the global fleet of Lockheed Martin Corp. F-35 combat jets was temporarily grounded to investigate engine problems following a Marine Corps plane crash last month.
Officials said the fleet of about 320 jets would undergo inspections over the next 48 hours to check fuel tubes in engines that are made by Pratt & Whitney, a unit of United Technologies Corp.