Regulators probe engine blow-outs as older Boeing 777s suspended

[James48]

9. Lost two blades.

Design regs are that it should not have lost two blades, and it should not have become an uncontainable failure- meaning parts fell to the ground. Design criteria regulations are such that it isn’t supposed to happen.

That particular engine model is 30+ years old, and a high time engine is support to get lots of inspections to prevent just such a possible failure of fan blades-

Obviously that is going to have to be re-examined, and new inspection criteria developed.