Announcement

Collapse
No announcement yet.

Helios 522 Redux?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    Originally posted by elaw View Post
    It could have gone differently. Keep in mind the masks don't necessarily require a *sudden* loss of pressure to drop... a slow increase in cabin altitude will do it to.

    And the injuries... couldn't they be caused by a sudden *increase* in pressure?

    So, a possible scenario: pilots accidentally leave pressurization off. Cabin alt. rises as the a/c climbs, and for some reason they miss the altitude warning at 11K. Cabin alt. continues to increase until the masks drop upon reaching 14K. At that point the pilots realize what's going on, turn on pressurization, the a/c suddenly pressurizes and injuries happen.

    At which point they decide they should return to the airport not because of a technical fault but because of the injured pax.
    Clinically speaking the nosebleeds and sudden intense ear pain would be more likely in these circumstances.
    If it 'ain't broken........ Don't try to mend it !

    Comment


    • #17
      Has anyone found a video of the whole sequence- with good time stamps to align with ATC tapes?

      That would be useful in speculating on what went wrong.
      Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

      Comment


      • #18
        Originally posted by elaw View Post
        It could have gone differently. Keep in mind the masks don't necessarily require a *sudden* loss of pressure to drop... a slow increase in cabin altitude will do it to.

        And the injuries... couldn't they be caused by a sudden *increase* in pressure?

        So, a possible scenario: pilots accidentally leave pressurization off. Cabin alt. rises as the a/c climbs, and for some reason they miss the altitude warning at 11K. Cabin alt. continues to increase until the masks drop upon reaching 14K. At that point the pilots realize what's going on, turn on pressurization, the a/c suddenly pressurizes and injuries happen.

        At which point they decide they should return to the airport not because of a technical fault but because of the injured pax.
        It has legs.

        Comment


        • #19
          Originally posted by elaw View Post
          It could have gone differently. Keep in mind the masks don't necessarily require a *sudden* loss of pressure to drop... a slow increase in cabin altitude will do it to.

          And the injuries... couldn't they be caused by a sudden *increase* in pressure?

          So, a possible scenario: pilots accidentally leave pressurization off. Cabin alt. rises as the a/c climbs, and for some reason they miss the altitude warning at 11K. Cabin alt. continues to increase until the masks drop upon reaching 14K. At that point the pilots realize what's going on, turn on pressurization, the a/c suddenly pressurizes and injuries happen.

          At which point they decide they should return to the airport not because of a technical fault but because of the injured pax.
          Yep. Could be. If the PACs have enough capability to pressurize the cabin that quickly, which I don't know one way or the other.

          Still inconsistent with the pilots stopping the climb at 11000 ft.

          I of course don't know what happened there, but it has to be something different than reported.

          --- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
          --- Defend what you say with arguments, not by imposing your credentials ---

          Comment


          • #20
            Originally posted by Evan View Post
            It has legs.
            Are you feeling ok? I understood it was Friday night, but WTF???

            --- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
            --- Defend what you say with arguments, not by imposing your credentials ---

            Comment


            • #21
              It has legs
              ...
              Are you feeling ok? I understood it was Friday night, but WTF???
              Colloquialism...” the theory has merit”
              Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

              Comment


              • #22
                Oh. Thanks.

                --- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
                --- Defend what you say with arguments, not by imposing your credentials ---

                Comment


                • #23
                  Originally posted by Gabriel View Post
                  Oh. Thanks.
                  That dog might hunt.
                  Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

                  Comment


                  • #24
                    Originally posted by 3WE View Post
                    Colloquialism...” the theory has merit”
                    Still, the idea that Evan might find any theory other than his own to have promise...

                    Comment


                    • #25
                      Originally posted by ATLcrew View Post
                      Still, the idea that Evan might find any theory other than his own to have promise...
                      As Gabriel said, it must have been quite a Friday night- and we know how that can affect RJ crews.
                      Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

                      Comment

                      Working...
                      X