South Korea Jeju air plane crash

alchal said:
Wonder if you could install a big net to at least slow a plane down at the end, kind of like the emergency ones on carriers.?
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There are systems that act like gravel traps for planes that are over running the runway - usually found where over running would lead to the aircraft going over a cliff or embankment. Not sure this type of system is effective on a plane which is sliding on its belly though.

I do wonder if the crew were just overcome by the other emergancies and just forgot the undercarriage.
 
I_M_Weasel said:
There are systems that act like gravel traps for planes that are over running the runway - usually found where over running would lead to the aircraft going over a cliff or embankment. Not sure this type of system is effective on a plane which is sliding on its belly though.

I do wonder if the crew were just overcome by the other emergancies and just forgot the undercarriage.
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They forgot the flaps and slats too. It's looking (potentially) like a bit of a pilot boo-boo here. A single engine failure does not stop all the hydraulics for flaps and gear. Even if they lost all hydraulics, you can do a gravity-drop of the gear. Hopefully the black boxes will tell us everything.
 
squerble said:
They forgot the flaps and slats too. It's looking (potentially) like a bit of a pilot boo-boo here. A single engine failure does not stop all the hydraulics for flaps and gear. Even if they lost all hydraulics, you can do a gravity-drop of the gear. Hopefully the black boxes will tell us everything.
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and the co-pilot didn't catch it either?
 
squerble said:
They forgot the flaps and slats too. It's looking (potentially) like a bit of a pilot boo-boo here. A single engine failure does not stop all the hydraulics for flaps and gear. Even if they lost all hydraulics, you can do a gravity-drop of the gear. Hopefully the black boxes will tell us everything.
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Does look like the thrust reverse was active though.

I suppose a catastrphic engine failure could take out all the hydrolics; but they were aligned with the runway so it does seem thay had control.
 
Wow, very sad and lots of questions to be answered.

alchal said:
Bird strike whilst taking off?

Watched it skidding along the end of the runway, but why oh why have giant walls bang at the end!!?
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Even by a lot of built up airport locations that is a wall very close to the runway!

esmozz said:
I’m not sure of the exact circumstances here but most likely the aircraft should have been yelling ´TOO LOW, GEAR´ to remind them.
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We’ll have to wait and see, but pilot error seems more likely to an mechanical in this era of flying.
 
esmozz said:
I’m struggling to see how a bird strike causes the landing gear to appear to fail completely.
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The hydraulics on the aircraft are usually operated in normal mode by the engines or by electric pumps powered by the engines. I'm not sure but I suspect the landing gear gets a lower priority on the available hydraulics than the flight surfaces.

If you lose the engines you can lose the main way to operate the landing gear, and although some have electric backups* they're also run via the engines and whilst there is usually a manual system for putting the landing gear down and the option to try a "gravity deployment" (you unlock the gear and hope gravity takes it down) both the manual and gravity methods require a lot more time to put the gear down and in the event of a gravity deployment you may not get a lock on it.

Basically it takes time to put the landing gear down via the backup methods if there is a failure in the primary systems and if you've lost your engines at a low altitude you may not have time to do that, especially if the pilots are concentrating on landing the aircraft and can't spend the time they've got operating the manual handle/pump for the landing gear.

*And there is often an APU (mini engine just for power), and depending on aircraft an air generator that can drop down the APU takes time to start up, and the air turbine only provides a very small amount of power intended for basically primary instruments and comms.
 
squerble said:
They forgot the flaps and slats too. It's looking (potentially) like a bit of a pilot boo-boo here. A single engine failure does not stop all the hydraulics for flaps and gear. Even if they lost all hydraulics, you can do a gravity-drop of the gear. Hopefully the black boxes will tell us everything.
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No flaps either? Sounds like the pilots crumbled under the pressure.
 
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