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Subject: Re: [LML] pinhole blowout of door seal 4P
From: "William A. Hogarty" <billhogarty@gmail.com>
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Bill:

There is an article in the archives on this topic.  If you cant locate it,
let me know and I will check my notes.

Good Luck,  Bill Hogarty

On Fri, Feb 17, 2012 at 10:07 AM, <cwfmd@yahoo.com> wrote:

> Yesterday over SE Colorado, staying down at 10-12k ft, I was staying low
> for wind, but planned a climb for terrain after AKO, enroute to COE. My
> pneumatic door seal blew out, and the cabin depressurized in about 3
> seconds, just as if you had hit the switch to dump the door seal.
>  I will guess that the pros put dual seals in to prevent this. It might
> have been a serious issue after a climb  into the flight levels for several
> reasons. Usual suspects are:, hypoxia, ear pop induced Coriolis effect,
> spatial disorientation, very cold breeze, etc.
>  Anybody ever look at redundancy here. Maybe a dual seal?
> R/ Bill Miller
> PS If there's interest I will tell about attempts to patch the pinhole on
> the inboard wall of the seal, while limping to destination. Any guidance
> there?
>

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<div>Bill:</div><div>=A0</div><div>There is an article in the archives on t=
his topic.=A0 If you cant locate it, let me know and I will check my notes.=
</div><div>=A0</div><div>Good Luck,=A0 Bill Hogarty<br><br></div><div class=
=3D"gmail_quote">
On Fri, Feb 17, 2012 at 10:07 AM,  <span dir=3D"ltr">&lt;<a href=3D"mailto:=
cwfmd@yahoo.com">cwfmd@yahoo.com</a>&gt;</span> wrote:<br><blockquote style=
=3D"margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204=
,204);border-left-width:1px;border-left-style:solid" class=3D"gmail_quote">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0"><tbody><tr><td styl=
e=3D"font:inherit;font-size-adjust:inherit;font-stretch:inherit" valign=3D"=
top">Yesterday over SE Colorado, staying down at 10-12k ft, I was staying l=
ow for wind, but planned a climb for terrain after AKO, enroute to COE. My =
pneumatic door seal blew out, and the cabin depressurized in about 3 second=
s, just as if you had hit the switch to dump the door seal.=A0<div>
=A0I will guess that the pros put dual seals in to prevent this. It might h=
ave been a serious issue after a climb =A0into the flight levels for severa=
l reasons. Usual suspects are:, hypoxia, ear pop induced Coriolis effect, s=
patial disorientation, very cold breeze, etc.=A0</div>
<div>=A0Anybody ever look at redundancy here. Maybe a dual seal?</div><div>=
R/ Bill Miller</div><div>PS If there&#39;s interest I will tell about attem=
pts to patch the pinhole on the inboard wall of the seal, while limping to =
destination. Any guidance there?</div>
</td></tr></tbody></table></blockquote></div><br>

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