Mailing List lml@lancaironline.net Message #55230
From: Steve Colwell <mcmess1919@yahoo.com>
Sender: <marv@lancaironline.net>
Subject: Legacy Trim Tab Servo Speed Control
Date: Sat, 29 May 2010 09:30:10 -0400
To: <lml@lancaironline.net>

 

 

How many incidents have been recorded of a shorted trim switch causing run-away servo travel ?

 

Wolfgang

 

On the first flight, our Legacy had runaway down trim.  Josh Brungardt, our Test Pilot, had located the Trim Circuit Breaker prior to takeoff so it was a non-event for him.  Josh continued circling the airport and completed the Test Card as planned.  Would I have survived this with the excitement of a first flight and low Legacy time??  It confirmed my decision to pay for a pro.

 

The Hat Switch, Relays and Trim Servos are Ray Allen components.  The only change I made before the next flight was to replace both early style (sorry I don’t have the part number) Relays with the later Larger Relays.  Gary at Ray Allen says they have no history with Relays sticking and changed the design due to a manufacturing environmental requirement.  I ran the Pitch Trim Servo many times prior to change out and it worked fine, all the wiring and connectors checked out too.  With over 200 hours, no problems, but you can bet I know where the Trim Breaker is.

 

Steve Colwell  Legacy

 

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