The U.S. military in recent weeks took contracting actions favoring Lockheed Martin worth $179 million.
A U.S.-led meeting of armaments directors from around the world will take place in Brussels on Sept. 28.
Service technicians inspected 706 cartridges from 349 F-35s, as well as additional supplies of spare cartridges.
Military officials won’t answer whether they’ve found the problem on any planes.
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