Aircraft Life

Date:         31 Mar 2000 22:25:34 
From:         James Robinson <NOSPAM@ERIE.NET>
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When discussing old aircraft, such as 747s or DC-9s built in the '60s or
early '70s, I've heard a number of people say that there are practically
no original components on them. They suggest that practically everything
would have been changed during maintenance over the years, from
structural components to machinery and avionics.

While I can understand the need for overhauls of worn mechanical
components, and requalifying avionics, I know less about the need to
replace structural pieces and fuselage parts.  I don't see as great a
need there.  I am curious if this is just urban legend, or if this
suggestion is truly the case.  Can anyone provide some insight?