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      Jennings


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      Post #67566, posted on 06-25-2017 GMT-5 hours    
      http://www.bbc.com/news/av/world-asia-40397081/air-asia-plane-suffers-washing-machine-fault

      Passengers (always a font of highly accurate technical knowledge) said an engine seized. AirAsia X says it was a "technical fault" (gee, y'think?).

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      TheFlyingDutchman


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      Post #67567, posted on 06-25-2017 GMT-5 hours    
      I'm not afraid of flying by any means but this looks quite terrifying. I wonder what was going on. Let's suggest it's an imbalance in one of the rotating parts, would shutting off that engine kill the vibrations, or will the air flow still force the rotors to turn, thus keep inducing the vibrations?

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      Jennings


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      Post #67568, posted on 06-25-2017 GMT-5 hours    
      I'm not sure, but I don't think it's engine related. The frequency is too low for that. Seems more like aerodynamic buffet to me.

      If this were a Boeing or a Douglas design I wouldn't be worried in the least. An Airbus.... not so much.

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      dave6376


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      Post #67569, posted on 06-25-2017 GMT-5 hours    
      Quote
      Jennings :
      I'm not sure, but I don't think it's engine related. The frequency is too low for that. Seems more like aerodynamic buffet to me.

      If this were a Boeing or a Douglas design I wouldn't be worried in the least. An Airbus.... not so much.



      It was a fan blade fracture according to the Aviation Herald http://avherald.com/h?article=4aac9f14&opt=0

      Are you saying that a fan blade fracture and consequent engine shut down is somehow less serious in a Boeing 767 or 777 than in an A330? If that actually is what you're saying it is, with all due respect, absurd.

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      airlinerart1


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      Post #67571, posted on 06-25-2017 GMT-5 hours    
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      Jennings :

      If this were a Boeing or a Douglas design I wouldn't be worried in the least. An Airbus.... not so much.




      What a strange thing to say, so are you saying Boeing and old, nae ancient, technology Douglas aircraft, in general, are far safer than Airbus? I find this Airbus/Boeing slagging match on websites and forums absolutely bizarre.

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      TheFlyingDutchman


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      Post #67572, posted on 06-25-2017 GMT-5 hours    
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      Jennings :
      The frequency is too low for that.



      Like, an engine 'running' at a relatively low RPM due to the airflow? I still think it's plausible. The imbalance due to some missing turbine blades or even an entire fan blade (it's not like they weigh absolutely nothing) would cause a lot of vibrations even at low speeds. Try throwing a brick in an idling tumble dryer. They frickin' obliterate themselves.
      https://www.youtube.com/watch?v=vROdVsU_K80

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      NX28388


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      Post #67573, posted on 06-26-2017 GMT-5 hours    
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      airlinerart1 :
      What a strange thing to say, so are you saying Boeing and old, nae ancient, technology Douglas aircraft, in general, are far safer than Airbus? I find this Airbus/Boeing slagging match on websites and forums absolutely bizarre.



      And, under the circumstances of an accident that could have turned deadly, I find the "my favorite manufacturer makes better airplanes than the other guy" talk in seriously questionable (if not poor) taste. I'm much more interested in what the investigation turns up, and how it can be prevented from happening again.

      Jodie Peeler

      In 1924 Wien was Alaska's first airline. In 1980 it still is.

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      FLYHY


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      Post #67602, posted on 07-01-2017 GMT-5 hours    
      I miss flying planes that were planes and not flying computers - yes, there is a difference.

      That being said, when I have dealt with a vibration, such as shown in the video, it has always been the result of a mechanical issue, not the computer or FBW system acting up.

      The only time this wasn't the case was when the computer failed, causing the autopilot to disconnect and then we had to, GASP, actually fly the airplane. Bumpiest flight I have ever had.

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      Bradlem


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      Post #67603, posted on 07-01-2017 GMT-5 hours    
      It is irrelevant what type of aircraft it is , let's stick to the art of modelling and await the appropriate official technical report.
      KR
      Mark

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      LH707


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      Post #67609, posted on 07-02-2017 GMT-5 hours    
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      FLYHY :
      I miss flying planes that were planes and not flying computers - yes, there is a difference.

      That being said, when I have dealt with a vibration, such as shown in the video, it has always been the result of a mechanical issue, not the computer or FBW system acting up.

      The only time this wasn't the case was when the computer failed, causing the autopilot to disconnect and then we had to, GASP, actually fly the airplane. Bumpiest flight I have ever had.


      I actually fly better when some of the gizmos are off: my CFI the other week dimmed the display and told me to "figure it out," went more smoothly than before.