[HN Gopher] Boeing 757 cargo door opens after takeoff
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Boeing 757 cargo door opens after takeoff
Author : EwanToo
Score : 68 points
Date : 2021-02-13 17:10 UTC (5 hours ago)
(HTM) web link (twitter.com)
(TXT) w3m dump (twitter.com)
| dralley wrote:
| The loadmaster is probably sweating bullets right now, as well
| they should...
| AceyMan wrote:
| Modern planes have comprehensive sensor systems for all door
| operations. If a door is not fully closed it's presented very
| obnoxiously on the flight deck, so I'd bet something either
| broke in flight or a sensor system was very out-of-tolerance.
| oasisbob wrote:
| Going beyond that, I thought modern planes were designed with
| plug doors and latches that physically can't get partially
| engaged.
|
| If you're depending on a sensor alarming on the flight deck,
| you're already several failures in I would think.
| NikolaeVarius wrote:
| Thats for passenger planes. Cargo aircraft don't want to
| sacrifice the swing in area.
| adamjb wrote:
| Link to the screenshotted article
|
| http://avherald.com/h?article=4e2fd449
| EwanToo wrote:
| Thanks, I tried to find it but couldn't
| lrem wrote:
| How rare is this kind of an accident?
| GlenTheMachine wrote:
| Caused the near loss of one DC-10 and the total loss of another
| one, a few decades back.
| ineedasername wrote:
| That was pretty specific to the DC-10: A money-driven design
| decision had the cargo door open outwards to allow more cargo
| to fit inside. A design _flaw_ meant that it was possible to
| close the door without fully locking it.
| matt-attack wrote:
| Do most airplane doors have a mechanism where "closing" is
| the same act as "locking"? That is, it's impossible for the
| door to be closed but not locked?
| ooboe wrote:
| Most commercial airplane doors cannot open directly
| outward. They unseal inward and then twist to clear
| outward. At altitude the internal pressure will push them
| directly outward and render them unable to open, even if
| the locks fail. In this regard they are fail-safe.
|
| The DC-10 eschewed this standard in favour of doors that
| opened directly outward with catastrophic results if the
| locks failed.
| nopzor wrote:
| modern aircraft doors open inwards first, this is a
| really important design feature.
|
| so therefore locking becomes irrelevant. even if some
| crazy person goes up to the doors mid flight and tries to
| disarm, unlock, and open them, they simply won't open
| when you're at altitude, even though the aircraft is
| pressurized.
|
| long story short the difference between closed and
| "locked" is actually almost irrelevant in modern
| airliners when the aircraft is at altitude.
| sashk wrote:
| Not frequent, but happened in the past. Example United 811 --
| https://en.wikipedia.org/wiki/United_Airlines_Flight_811
| missedthecue wrote:
| This is what my mind immediately went to. Can't believe that
| plane flew for another decade and a half.
| ineedasername wrote:
| _" several parts separated & were distributed over the ground"_
|
| That seems like a comically understated way to say that pieces of
| a plane broke off while traveling a few hundred miles an hours &
| fell 5,000 feet to the ground below.
| danaliv wrote:
| This industry is chock full of dryly technical jargon for
| describing absolute horrors. My go-to is CFIT, or "controlled
| flight into terrain." Yikes.
| sokoloff wrote:
| RUD-Rapid Unscheduled Disassembly - "It blew up" (more
| aerospace than straight aviation)
| hinkley wrote:
| Controlled Flight Into Terrain: pilot thought he knew how
| to miss the ground. Pilot was wrong.
|
| Engine-rich exhaust: shit's on fire, yo.
| sllabres wrote:
| https://www.flightradar24.com/data/aircraft/g-dhkz#26d05e8c
| justnotworthit wrote:
| ...and I had just built up the courage to take my dogs on a plane
| trip.
| londons_explore wrote:
| The report saying pieces fell on a coal plant, but also saying no
| cargo was dropped suggests pieces of the aircraft fell...
| Suggesting perhaps some panels were ripped off by the airflow.
| mdoms wrote:
| The very sentence that mentions the coal plant also states that
| it was parts of the air frame???
| andor wrote:
| Original article in the screenshot:
| http://avherald.com/h?article=4e2fd449&opt=0
| surfer7837 wrote:
| I thought all modern aircraft had plug doors [1] that means it
| cannot be opened in flight? Unless the pressure difference was so
| low it didn't matter in this case?
|
| [1] https://en.wikipedia.org/wiki/Plug_door
| nopzor wrote:
| indeed they do, i don't have a lot of details in this case, but
| it seems like it happened at very low altitude. the plug door
| design works when there's an actual pressure differential (ie.
| at higher altitude)
| ygra wrote:
| From that very article: "However, since plug doors must open
| inward, the design is disadvantageous for cargo doors. Due to
| its large area, the cargo door on an airliner cannot be swung
| inside the fuselage without taking up a considerable amount of
| valuable cargo space. For this reason, these doors often open
| outward and use a locking mechanism with multiple pins or hatch
| dogs to prevent opening while in flight."
| danaliv wrote:
| That's true of most airplanes' doors for humans, but the cargo
| door on a 75 opens outward. It's too big to be a plug.
|
| https://kawakaviation.com/wp-content/uploads/2016/12/Kawak-A...
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(page generated 2021-02-13 23:01 UTC)