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Date: Fri, 17 Feb 2012 13:07:36 -0500
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From: cwfmd@yahoo.com
Subject: pinhole blowout of door seal 4P
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Yesterday over SE Colorado, staying down at 10-12k ft, I was staying low fo=
r wind, but planned a climb for terrain after AKO, enroute to COE. My pneum=
atic door seal blew out, and the cabin depressurized in about 3 seconds, ju=
st as if you had hit the switch to dump the door seal.=A0=A0I will guess th=
at the pros put dual seals in to prevent this. It might have been a serious=
 issue after a climb =A0into the flight levels for several reasons. Usual s=
uspects are:, hypoxia, ear pop induced Coriolis effect, spatial disorientat=
ion, very cold breeze, etc.=A0=A0Anybody ever look at redundancy here. Mayb=
e a dual seal?R/ Bill MillerPS If there's interest I will tell about attemp=
ts to patch the pinhole on the inboard wall of the seal, while limping to d=
estination. Any guidance there?
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;">Yesterday over SE Colorado, staying down at 1=
0-12k 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 depres=
surized in about 3 seconds, just as if you had hit the switch to dump the d=
oor seal.&nbsp;<div>&nbsp;I will guess that the pros put dual seals in to p=
revent this. It might have been a serious issue after a climb &nbsp;into th=
e flight levels for several reasons. Usual suspects are:, hypoxia, ear pop =
induced Coriolis effect, spatial disorientation, very cold breeze, etc.&nbs=
p;</div><div>&nbsp;Anybody ever look at redundancy here. Maybe a dual seal?=
</div><div>R/ Bill Miller</div><div>PS If there's interest I will tell abou=
t attempts to patch the pinhole on the inboard wall of the seal, while limp=
ing to destination. Any guidance there?</div></td></tr></table>
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