US Patent 11319833 Fan case with crack-arresting backsheet structure and removable containment cartridge

A fan case with crack-arresting backsheet structure and removable containment cartridge is disclosed. An example engine fan case includes a segmented backsheet structure, the segmented backsheet structure including at least a first backsheet segment of a first length and a second backsheet segment of a second length, the first backsheet segment coupled to the second backsheet segment and at least one of the first backsheet segment or the second backsheet segment coupled to the fan case, a honeycomb structure, and a containment structure for blade fragment retention, the containment structure coupled to the segmented backsheet structure.