737 Aircraft loses lump of engine in flight.

empip

empip

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GE/CFM 737 engine loses front fan blade - (see space behind investigator's forearm).
DbBisehX0AE-VHu.jpg

From
https://www.reddit.com/r/aviation/comments/8d1p7j/sw_737_fan_disk_missing_a_blade_ntsb_photo/

Seems like the old fan can be a problematic part of the structure.

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DbBisehX0AE-VHu.jpg
 
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The R-R Trent engine uses single crystal blades, which means that there can't be any fracture across the grain lines - because there aren't any. The blades are also hollow so that cooling air can be forced through them...pretty handy as the exhaust gas temperature is higher than the nickel alloy melting temperature!
Now that's proper engineering.
John :)
 
I think the fan blades are titanium, but I haven't looked at the specs for ages.....I don't think there is anything better at the current time, and they slot into place.
The one piece turbine blades make the chance of internal engine explosions almost redundant, which was the reason for their development in the first place, if I recall correctly.
For sure, they'll get there!
John :)
 
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Burnerman said:
I think the fan blades are titanium, but I haven't looked at the specs for ages.....I don't think there is anything better at the current time, and they slot into place.
The one piece turbine blades make the chance of internal engine explosions almost redundant, which was the reason for their development in the first place, if I recall correctly.
For sure, they'll get there!
John :)
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Lets wait and see what the final incident report says before we speculate
 
As usual the media is treating the pilot as a 'hero' for following standard one engine failure and cabin depressurisation procedures. The fact the pilot is a female is immaterial but will no doubt be showcased for PR.
 
I find it quite incredulous that, with an aircraft engine failure, the engineers have often actually known that there was a fault and reported it complete with recommendations of what needs to be done.
This is, of course, largely ignored.
John :)
 
transam said:
She was a navy top gun pilot ;)
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The voice procedures used during her recorded message played on the news tonight suggests otherwise. I would have expected something more professional and succinct from her. Informing the air traffic controller in a casual tone that 'something has fallen off the engine' and a passenger has 'went out' is not what I would expect to hear. She managed to confuse the controller as he had to seek clarification of what she was trying to describe.
 
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