From: utzoo!decvax!harpo!eagle!mhtsa!alice!rabbit!ark
Newsgroups: net.aviation
Title: Re: Losing vacuum pump in IFR
Article-I.D.: rabbit.1024
Posted: Wed Jan  5 11:31:20 1983
Received: Thu Jan  6 03:24:15 1983
References: watcgl.93

I think that a third advantage of a backup vacuum pump is that it
is much cheaper than an electric attitude indicator.  Last time I checked,
the only electric attitude indicators available were staggeringly
expensive -- starting at something like $7,000!  This may well have
changed, and I may be wrong, but...