Testing Finds Minor Cracks in Marine F-35 Bulkheads

Ground testing of the most complex version of Lockheed Martin Corp. F-35 jet has uncovered two small cracks the Pentagon describes as minor, according to a statement to congressional staff. The cracks were discovered in late August during an inspection of the U.S. Marine Corps’ short-takeoff and vertical landing model that’s used in ground testing to evaluate an airframe’s long-term durability. The airframes are designed to last through 8,000 flight hours. They are tested on the ground to the eq

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