Larry,

You are right.  In this case, Arnie (like many others) wired his relay power
thru a "Miscellaneous" breaker and cannot afford to pull it if he pulls the
motor power breaker.  Since he had an irritating slow leak in his
electraulics system, he would pull the only the motor breaker for great
lengths of time on the ground during taxi, but this would only affect the
"down" part of the system.  

It is possible that the failed pressure switch would keep the "up" relay
engaged, but we all know when the pump is running in flight.  Perhaps he
unknowingly had the motor breaker pulled during our 2.3 hour flight to OGD.

In any event, I have tried to get Lancair to alter their wiring diagram for
years, but to no avail.  The safest way to wire your electraulic system is to
wire the relay power breaker, fuse or inline fuse after the motor power
breaker.  This way, when the motor breaker is pulled, all the power is taken
off the complete system.  

An additional consideration is that the "pump running" indicator light is
powered off the motor relay contacts.  A short in the indicator light circuit
would be presenting 50 or 60 amps to a 20 or 22 gauge wire with no
protection.  I can smell the wires burning now.  This circuit from both
relays should be diode isolated and fused.  The Legacy circuit at least uses
very small diodes (no fuse) and one would hope they would pop before the fire
started.

Gentlemen, fix your electraulic system now!

Note: The term "Electraulic" used to describe our electric-hydraulic system
is the invention of Tom Giddings.  I love it and the English language, a
language as malleable as a piece of soft aluminum.

Scott Krueger
N92EX