We recently reported that the F-15 fleet was ungrounded. Now according to the Air Force, Air Combat Command has grounded the F-15 A-D models and is encouraging other commands to do the same. The Accident Investigation Board has found new evidence showing that there may be structural issues with the longerons along the pilot's canopy.
The aircraft initially performed a general inspection on the longerons. Once the longerons went through a metallurgical analysis, they refined the inspection technique for inspecting the longerons. We will keep you up to date as more information becomes available.