The Marine Corps will redesign the aluminum bulkheads on the F-35B to prevent cracking, which was discovered on one plane in February after nearly 10,000 hours of testing, Commandant of the Marine Corps Gen. James Amos said Tuesday. The structural bulkhead of the plane is made of aluminum to minimize weight, but engineers discovered cracks in it during dynamic testing after about 9,800 hours–past the expected 9,000-hour service life of the plane, Amos said at the American Enterprise Institute. Despite…
