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I work in the Avionics industry. I always wonder, how many Line-Replaceable Units (LRUs) are present in modern aircraft like A380 and Boeing 747.

I understand that number of LRUs varies from customer to customer. I just want to know in general how many LRUs present in an Aircraft.

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    $\begingroup$ "modern" is rather loosely defined here - the 747's first flight was in Feb 1969! $\endgroup$ – FreeMan Aug 12 '20 at 16:25
  • $\begingroup$ Yes :-) But still it had many iterations (small updates) $\endgroup$ – Aravind D. Chakravarti Aug 14 '20 at 2:02
  • $\begingroup$ In that case, you might want to amend that question to specifically be about the B747-8*, just for clarity's sake. $\endgroup$ – user50571 Aug 15 '20 at 14:35

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