From kls Wed Jan 13 02:13:53 1999
Path: bounce-back
Newsgroups: sci.aeronautics.airliners
Date: 13 Jan 99 02:13:53 
From: Seth Dillon <bdillon1@mindspring.com>
Subject: Re: Stand-by instruments (was external inspection)
References: <airliners.1998.1823@ohare.Chicago.COM> <airliners.1998.1869@ohare.Chicago.COM> <airliners.1998.1894@ohare.Chicago.COM>
Message-ID: <airliners.1999.39@ohare.Chicago.COM>
Approved: kls@ohare.Chicago.COM
Sender: kls@ohare.Chicago.COM
Organization: MindSpring Enterprises
Reply-To: bdillon1@mindspring.com

M. Jones wrote:
> >You may not be aware that the flight instruments in newer transports are
> >electrically driven instruments; that is to say breaking the VSI or
> >other pressure gauge might work in a light plane but will not recover
> >the pitot-static system ...

How would breaking the glass of the VSI give you an alternate static
source in a pressurized aircraft?