"Jay Honeck" wrote in message news:xdvnb.50697$HS4.232433@attbi_s01...

Doesn't it seem just a little weird to lose both vacuum instruments in a six
week period? Is there any way my vacuum pump could still be putting out 5
inches of suction, and somehow sending junk into the instruments? Could the
AI failure last month have influenced the DG failure this month?

Or is it just bad luck that they've failed together? Any opinions?

You do have a vacuum filter on the intakes to these things? When we lost both
our gyros (other than finding one and a $5 price tag on the top of it), we found
that the gyro inputs were just open to the crumbling insulation behind the panel.