WASHINGTON — It was during a routine inspection in April that an Air Force technician found a single faulty Cartridge Actuated Device in the ejection seat of an F-35 at Hill Air Force Base, Utah. The device — known colloquially as CAD — contained no magnesium powder, a necessary material for generating the explosive charge that allows a pilot to begin ejecting from an aircraft.
At first, the potential issue was believed to be confined only to the F-35. By late July, however, the problem appeared more widespread, potentially impacting hundreds of aircraft across the US military’s tactical and training jet inventory that use ejection seats made by Martin-Baker, the UK-based firm that is one of two suppliers of ejection seats for the Defense Department.