Re: Fuselage flex?

Date:         31 Mar 2000 22:25:39 
From:         Hugh Dickson <hnlhugh@pixi.com>
References:   1
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John S. Maddaus wrote:
> Been riding some of United's 727s lately and couldn't help but notice
> that on every one the emergency floor lighting strip separated from
> the floor a good inch or so in height just behind row 14 (just in
> front of the first window exit) at altitude.  I watched the last one
> throughout the flight and it gradually returned to floor level upon
> initial descent.  No separation while on the ground.  Question - what
> causes this?

Aloha,     Typically, trapped air.  In this case it might
be rubber "moisture barrier" material trapping the air.
Take a look at the wallpaper some time.  DC-10s
were the worst for forming "bubbles" in flight but would
look OK upon landing.

Hugh,  former UAL "paper hanger"