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Old 25th Sep 2008, 04:06
  #1992 (permalink)  
HarryMann
 
Join Date: Jan 2008
Location: Herts, UK
Posts: 741
In fact, can someone answer this question please...?

Are the racks of relays and CBs changed entirely 'on condition' throughout the aircraft's life, or are they 'lifed' and the whole rackfull changed based on flying hours, flights or a given time from installation/ manufacture date?
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