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jeffw@lemmy.world to World News@lemmy.worldEnglish · 5 months ago

Cause of South Korea plane crash unclear as officials focus on bird strikes

www.theguardian.com

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Cause of South Korea plane crash unclear as officials focus on bird strikes

www.theguardian.com

jeffw@lemmy.world to World News@lemmy.worldEnglish · 5 months ago
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Experts say bird strikes are relatively common and should not have been enough to cause landing gear failure
  • deegeese@sopuli.xyz
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    5 months ago

    Complete loss of power due to strikes on all engines. The ram air turbine is not enough to move all those parts.

    • FourPacketsOfPeanuts@lemmy.world
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      5 months ago

      Boeing 737 allows for gravity drop of landing gear which would work even with total power loss

      https://aviation.stackexchange.com/questions/79782/can-the-landing-gear-be-lowered-when-system-a-hydraulic-pressure-is-lost-in-boei

      Ram air turbine is sufficient for control surfaces, which is what it’s designed for

      • SapphironZA@sh.itjust.works
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        5 months ago

        Having one thrust reverser deployed on the side of the bird strike was super weird. Both thrust reversers can be controlled by the APU hydraulic system

        • deranger@sh.itjust.works
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          5 months ago

          The APU doesn’t have a hydraulic system. There are three redundant electric pumps however, and these can run off the battery. Regardless, I don’t believe there was any issue with the hydraulics as the plane was well controlled on the final approach.

          • FourPacketsOfPeanuts@lemmy.world
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            5 months ago

            It just gets weirder doesn’t it

          • SapphironZA@sh.itjust.works
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            5 months ago

            I see what you mean. It’s not directly connected I see. Only indirectly via electrical pump as you pointed out.

            It is curious that no flaps or spoilers were deployed. Maybe the control was not as great as it appeared. The plane did touch down a long way down the runway.

    • deranger@sh.itjust.works
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      5 months ago

      There’s no ram air turbine on a 737.

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