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Old 9th Jan 2020, 09:52
  #190 (permalink)  
Mark in CA
 
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Originally Posted by EDMJ
Have you got a source for that exact wording, because as far as I know the cowling will never be able to contain an errant blade, only the fan casing will? Moreover,

- the fan appears to me to be too far forward to be able to puncture a wing tank;
- the AD's regarding fan blade attachment on the CFM56 engines have been around for so long that there should be a great deal of awareness around about this issue, to the extent that this shouldn't be an issue anymore;
- the two Southwest aircraft which had uncontained engine failures were 10-15 years old, and the present aircraft is only about 3 years old;
- from a statistical point of view since several years there is a huge amount of B737's with these engines around, logging a tremendous amount of flying hours, yet such a catastrophic engine failure has never happened....
[Boeing] said “enhancements are being introduced” to inlet and fan cowls to improve “their ability to withstand an engine fan blade out event as well as to increase the overall capability of these structures.”

https://www.cnbc.com/2019/11/19/ntsb...-accident.html
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