Mailing List lml@lancaironline.net Message #31336
From: <Sky2high@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] 320/360 Gear Relays & Power Pack Thermal Protection
Date: Sat, 20 Aug 2005 19:04:04 -0400
To: <lml@lancaironline.net>
In a message dated 8/20/2005 12:57:32 P.M. Central Standard Time, bobjude@charter.net writes:
Didn't you forget something on your "Here is what it should look like"
wiring diagram?

The black wire coming out of the power pack should be the only ground for
the power pack in order to provide thermal protection.

See Lancair Mail, 4th quarter, 94, page 9.
Bob,
 
Nope, I specifically cut out that piece of the diagram because it says "Note: This wire is not used."  I know that Lancair changed that with later commentary, maybe even a Service Bulletin.  But, many of us have already cut that wire down to the nubbin (nothing left) and thus do not have the thermal protection that later builders have.  Oh, wait -- I have just recovered from a Senior Moment.  I replaced my pump a few years ago and did ground that wire.  Thanks for the heads up.  Of course, this also changes the whole mounting scheme, i.e. The common grounded aluminum mounting plate must not be attached to the pump itself but still must be used to ground the relay cases. 
 
That means it should look like this:
 
   
BTW, I hope no one has the 50A breaker mounted on the baggage bulkhead!  I have mine on the console just under my right wrist.  John Denver taught us a lesson about reaching for something behind whilst excited.
 
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)



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