The blade containment is part of the engine itself, which is made by CFM. CFM has had some issues with the generation before LEAP and blade failure, but the l

The blade containment is part of the engine itself, which is made by CFM. CFM has had some issues with the generation before LEAP and blade failure, but the last I looked at the reports it appears the blades were contained on the accident flights, its just the cowling caused issues. Example of one of the incidents: https://en.wikipedia.org/wiki/Southwest_Airlines_Flight_1380 https://en.wikipedia.org/wiki/Southwest_Airlines_Flight_1380 Boeing would be responsible for the cowling design, and has been directed to update the cowling design based on the new models created based on this incident. The failure is not really as much a failing on Boeing's part to design it correctly in the first place, but a lack of data indicating certain unforeseen blade trajectories are possible on failure. Now that these are a known thing, they will be incorporated in design updates throughout the industry. Final report: https://ntsb.gov/investigations/AccidentReports/Reports/AAR1903.pdf https://ntsb.gov/investigations/AccidentReports/Reports/AAR1...