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NTSB conducted 2016 probe of same engine model as Southwest incident

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The National Transportation Safety Board said in a tweet it was sending a team to investigate. The NTSB investigates the most serious engine failures and conducted a probe of a similar Southwest incident in 2016 involving the same type of engine. In that incident, a fan blade snapped off a Southwest 737-700 engine mid-flight (www.mysanantonio.com) 기타...

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benbagnall
these Engines are well maintained. At certain intervals based on engine times ( hours of operation), or cycles ( The number of times started, run up to full power such as during take off, and then shut down) inspections are performed.
There are frequent visual inspections, sometimes using a borescope, which has a camera on the end of a snakelike arm which can reach inside the “hot section” of the engine. Also these aircraft are subject to trend monitoring, which graph their performance overtime utilizing different parameters in order to gauge the health of an angel. At a “hot section” inspection, the engines are Partially dismantled to access the hot section which includes the critical parts. These are carefully examined for defects. Many of the critical parts are life limited, which means that they have to be retired from service at a certain number of hours are cycles Regardless of condition. When an engine reaches its overhaul time, determined by hours in service, cycles, or condition, then it receives a major overhaul, where it is completely dismantled and rebuilt. This can easily cost over $1 million or more. Even after all this, parts can still fail. Airliners are designed to fly well with an engine failure, And crashes following engine failures in airliners are extremely rare.
The failure of some of the parts resulting in uncontained catastrophic engine failure is concerning. They ask a great deal of these hot section components which are subject to extreme temperatures and forces in order to get the performance needed.
wph136
Excellent information and insight ! Thank you!
benbagnall
If one blade comes off it creates an imbalance which results in catastrophic failure within seconds. The engine literally vibrates itself to pieces. I invite you to look at the pictures of the engine...does it look like just one blade has fallen off?
larryzee
The majority of the reporting says one blade in the fan disk was missing, but that seems like a lot of damage to the shroud for one blade. I wonder if something back in the compressor sections didn't start the whole thing...
azdbac
Dee Ried 1
Is it true that most of the airlines have the maintenance on planes done across the pond because labor and parts are cheaper? Maybe El Salvador??
benbagnall
Actually, no, that’s not true. Of course there are shops all over the world because there are aircraft all over the world, few industries are more regulated. US airlines are required to control their maintenance. Btw, El Salvador is not “across the pond”, unless you are in Europe,
azdbac
Dee Ried 1
Thanks and I didn't mean to imply that El Salvador was across the pond...I should have put "OR" in there. I did not remember the exact place in the article.
azdbac
Dee Ried 1
The article that I read at an earlier date that I was unable to remember the facts. https://www.nbcdfw.com/news/business/Southwest-Airlines-Will-Send-Planes-to-El-Salvador-For-Maintanence.html
taterhed1
SWA took delivery of the engine and the airframe in 2000.
So, highly unlikely (impossible?) that the engine is not part of the original delivery.

10000 cycles SMOH and 40000 cycles total.

Not sure, are those numbers typical or high?

Please don't post 'fake news' in here. Go watch TV if you want that.




The 2016 incident prompted the Federal Aviation Administration to issue a proposed airworthiness directive calling for enhanced ultrasonic inspection of the fan blades of that particular engine type, the CFM56-7B manufactured by CFM International, a joint company owned by General Electric and France-based Safran Aircraft Engines.

The plane in Tuesday’s accident was delivered in 2000 and its failed engine had flown 40,000 cycles -- counted as one takeoff and one landing. Southwest CEO Gary Kelly said the engine had operated 10,000 cycles since its last overhaul and the company said the engine was not subject to the airworthiness directive.

https://www.nytimes.com/reuters/2018/04/18/world/europe/18reuters-pennsylvania-airplane-inspection-southwest.html


Boeing 737-7H4 (WL)
Operator: Southwest Airlines
Registration: N772SW
C/n / msn: 27880/601
First flight: 2000-06-26 (17 years 10 months)
Engines: 2 CFMI CFM56-7B24
Crew: Fatalities: 0 / Occupants: 5
Passengers: Fatalities: 1 / Occupants: 144
Total: Fatalities: 1 / Occupants: 149
Airplane damage: Substantial
Location: 105 km (65.6 mls) NW of Philadelphia, PA ( United States of America)
Phase: En route (ENR)
Nature: Domestic Scheduled Passenger
Departure airport: New York-La Guardia Airport, NY (LGA/KLGA), United States of America
Destination airport: Dallas-Love Field, TX (DAL/KDAL), United States of America
Flightnumber: WN1380
Sadus
Sadus 2
The only fake news is that fake news is a thing. I'd ask you to post a specific example of fake news but that's ok, who knows what other insane things you believe too.
csteinbrecher
Good information all! YES! PLEASE, no fake new; just facts please.... Taterhed1, thanks for the SMOH data as well.

[This comment has been downvoted. Show anyway.]

ToddBaldwin3
Can you cite your sources for that?

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