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Regarding the discussion on the third wire (the "little black wire")

emerging frome the hydro pump, I remember vaguely a communication

from the factory quite a while ago that refutes their earlier

instructions to cut it off and tape it. I'm sure it described

that wire as as Oildyne does, i.e., a thermal ground cut-off. If

I remember right, it opens on over-temp and should be the return for your

pump-control relay coils. That way, if the pump gets too hot (like from

running on too long) the thermal protection will turn off the pump relays.



This should be able to be confirmed by the factory. I'm pretty sure I'm

right and if so, this feature should be hooked up in all our aircraft. But

memory being what it is, be sure to confirm with Lancair before doing any

rewiring. It sounds like a very good safety feature and could save the

pump one day - worth while as they're not cheap! And in my airplane, would

be a real SOB to even get at to remove!



Fly Safe,



Dan Schaefer

N235SP





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