American 763 takeoff incident, ORD
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All makes perfect sense regarding PMA turbine blades. I hadn't considered the differences in through-blade cooling airflow - very much a critical concern in that part of the engine core. Thank you LomaP and TD. 
I thought GE re-jiggered manufacturing and overhaul specs after the first couple of HPT disk failures and those changes were designed to mitigate these events - but my point may be moot as we really don't know what happened yet.
I thought GE re-jiggered manufacturing and overhaul specs after the first couple of HPT disk failures and those changes were designed to mitigate these events - but my point may be moot as we really don't know what happened yet.
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In addition to what tdracer already highlighted, with regards to PMA parts.
This article may be of some interest.
http://www.chromalloy.com/files/news...542415a369.pdf
Dated December 2009
"There are now more than 300,00 approved PMA parts, and the number grows each year by about 35,000"
"To give an example of how our prices compare to OEMs, you can pay $50-83 for a wheel seal, while our prices are $30-50. This adds up to a large saving for an airline using 500 seals each year"
This article may be of some interest.
http://www.chromalloy.com/files/news...542415a369.pdf
Dated December 2009
"There are now more than 300,00 approved PMA parts, and the number grows each year by about 35,000"
"To give an example of how our prices compare to OEMs, you can pay $50-83 for a wheel seal, while our prices are $30-50. This adds up to a large saving for an airline using 500 seals each year"
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NTSB Pelim
NTSB: Engine disk failed, sending pieces flying from plane at O'Hare - Chicago Tribune
....Examination of the engine revealed that the stage two disk of a high-pressure turbine failed, Lorenda Ward, a senior investigator for the NTSB, said in a news conference late Saturday afternoon at O'Hare....
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One piece of the disk was found in a UPS warehouse 2,920 feet south of the plane and another piece was found about 0.3 miles north of the plane on airport property. About 90 percent of the disk has been found.
The disk pieces will be sent to Washington, D.C., for testing, officials said. The right engine — the one involved in Friday's accident — was made by General Electric. It will be removed, sent to GE and dismantled. Maintenance records will be reviewed as part of the investigation, Ward said."
It still amazes me how stupid people would rather stand in a cabin filming an evacuation to be a star of YouTube instead of trying to save themselves from possible smoke inhalation. Is this the norm now?
crewmeal
be thankful that in this incident, plus the dynamic airways 767 fort Lauderdale fire, and both the EK and the SQ 777 incidents that the wind was blowing the fire AWAY from the fuselage each time
otherwise we could have been looking at 4 x Manchester B/Airtours scenarios
be thankful that in this incident, plus the dynamic airways 767 fort Lauderdale fire, and both the EK and the SQ 777 incidents that the wind was blowing the fire AWAY from the fuselage each time
otherwise we could have been looking at 4 x Manchester B/Airtours scenarios
@ crewmeal... "It still amazes me how stupid people would rather stand in a cabin filming an evacuation to be a star of YouTube instead of trying to save themselves from possible smoke inhalation. Is this the norm now?"
You can hear some people yelling at others to get out (I presume some were trying to pull things out of the overhead bins). Even once outside the aircraft you can hear a woman calling someone a sick
There doesn't appear to be much instruction from cabin crew at the door - I heard a brief mention of "sitting position" but other than that it wasn't obvious there was even a crew member there!
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Forgetting to shut the engines down immediately after an evacuation command, with unusable slides and/or passengers blown the ground, seems to become a common occurrence.
Or maybe it is placed too far down in the evacuation checklist?
Or maybe it is placed too far down in the evacuation checklist?
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Going only from that evacuation video, my wife (ex cabin crew) remarked on the lack of commands from the cabin crew.
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With the mention of the engine remaining running, and slides being blown around, I wonder who initiated the evacuation- Flight deck or Cabin crew. (I can't quite bring myself to read back through the thread to see if it's mentioned.
I once had a conversation with one of the more seasoned number-ones, who took the view that if she started an evacuation without instruction from us on the flight deck, then her responsibility was to the greater passenger load as a whole, rather than the unfortunate first one down the slide and into a still running engine...
I once had a conversation with one of the more seasoned number-ones, who took the view that if she started an evacuation without instruction from us on the flight deck, then her responsibility was to the greater passenger load as a whole, rather than the unfortunate first one down the slide and into a still running engine...
cabin crew seemed very passive in videos
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This was most likely a cabin crew intimated evacuation, which they are entitled to do, but only if they cannot contact the flightdeck. The report will show the truth, but I would suspect that the flight attendants jumped the gun on the evacuation. It is fortunate that the flightdeck had already turn the fuel control switches off and the engine was winding down.
