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      the PRIDEbird


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      Post #66188, posted on 02-24-2017 GMT-5 hours    
      Regarding the topic
      Building the first " in service " 737 ever
      (some may complain overwing escape markings missing)
      I have 2 questions:

      Some changes became mandatory after tragic accidents
      e.g. door outlines and overwing escape markings.

      1st question: What were the reasons
      for outlined doors and
      the escape markings on the wings?

      2nd question: When were they introduced?

      Sven

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      Jennings


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      Post #66193, posted on 02-24-2017 GMT-5 hours    
      I would answer, but you'd probably argue with me, so I'm not going to bother with you anymore.

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      BruinPrideBand


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      Post #66194, posted on 02-24-2017 GMT-5 hours    
      Someone else will know more than I do... But the escape path markings were mandated in the US in the mid-1960s. Why they were originally implemented I can only speculate on but the rear of the wing is much lower than the leading edge. I'm sure this made it much safer to slide off. On many modern airliners there are actually escape slides at the rear of the wing so the pathways direct passengers to those slides. I can't point to a specific incident that would have required the pathways (like I should be able too...).

      For those interested, here is the applicable FAR:

      http://www.flightsimaviation.com/data/FARS/part_25-810.html

      Chris

      "Sorry Goose... But it's time to buzz the Tower."

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      the PRIDEbird


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      Post #66195, posted on 02-24-2017 GMT-5 hours    
      Hi Chris,

      thanks so much
      for your response!
      👍


      Hi Jennings,

      would love to discuss with you.
      I like discussions.
      Don't misunderstand.
      No need to sulk and you might be a bit sensitive?
      You know a lot and you are sure a luminary in this area.
      I don't see the things so seriously.
      Always with a smiling eye.

      There's no audio in this forum
      which would make it easier
      to understand statements better.
      Maybe me too...
      😉 😉 😉 😉 😉

      That's all to say!

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      Chernoff


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      Post #66196, posted on 02-24-2017 GMT-5 hours    
      g) Exterior exit markings. Whenever the exterior exit markings on an airplane are repainted or after June 30, 1969, whichever occurs first, each passenger emergency exit that is required to be operable from the outside, and its means of opening, must be marked on the outside of the airplane in accordance with the following:
      (1) There must be a two inch colored band outlining the exit.
      (2) Each outside marking, including the band, must have color contrast to be readily distinguishable from the surrounding fuselage surface.

      This gives an idea of the time frame when this marking was mandated. Wing path markings came later but additional research is required to determine exactly when.

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      the PRIDEbird


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      Post #66197, posted on 02-24-2017 GMT-5 hours    
      👍👍👍👍👍

      Thanks so much!
      I've learned something about it.