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Use or non use ?

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DBerelsman(at)aol.com
Guest

Posted: Mon Sep 25, 2006 1:13 pm Post subject: Use or non use ?

To Bob and the list.

  

 I live in Florida and fly an older 182. (Vintage 1976)

  

 I am wondering about the best way to preserve these older avionics  boxes, relays, contacts, switches and dials.

  

 Is it best to:

  

 Keep them off whenever they are not used (meaning they could be off for  months at a time)... during which time they may be subjected to  large ambient temperature changes of 50-120 deg - being inside the cabin of a  plane which sometimes must be parked outside in the sun.

  

 OR.... 

  

 Use them as much as possible... thereby exercising the switches  and dials and coursing electrons thru every contact... but heating up the old  semiconductors still further.

  

 Opinions please.

  

  [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Mon Sep 25, 2006 7:33 pm Post subject: Use or non use ?

At 05:12 PM 9/25/2006 -0400, you wrote:



 	  Quote: 	
		  To Bob and the list.



I live in Florida and fly an older 182. (Vintage 1976)



I am wondering about the best way to preserve these older avionics boxes, 

relays, contacts, switches and dials.



Is it best to:



Keep them off whenever they are not used (meaning they could be off for 

months at a time)... during which time they may be subjected to large 

ambient temperature changes of 50-120 deg - being inside the cabin of a 

plane which sometimes must be parked outside in the sun.



OR....



Use them as much as possible... thereby exercising the switches and dials 

and coursing electrons thru every contact... but heating up the old 

semiconductors still further.


	


    For the most part, the most environmentally destructive

    thing you can to do airplanes and their components (including

    electronics) is to let them sit idle for long periods of

    time. Obviously, many components have a service life that

    is used up more rapidly if the airplane is used often.

    However, unless the airplane is used in a rental fleet

    the strongest effects are likely to be environmental and

    generally exacerbated by lack of use.



    If it were my airplane, I'd operate every switch and rotate

    every control through a full cycle on every pre-flight.



    Bob . . .

      ---------------------------------------------------------

      < What is so wonderful about scientific truth...is that >

      < the authority which determines whether there can be   >

      < debate or not does not reside in some fraternity of   >

      < scientists; nor is it divine. The authority rests     >

      < with experiment.                                      >

      <                            --Lawrence M. Krauss       >

      ---------------------------------------------------------

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