airliner maintenance

From:         Andrew Boyd <>
Date:         01 Jun 94 14:35:01 
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Howdy.  Someone here at work asked me a question that I hadn't
the foggiest idea of the answer to:

For every hour that an average jet airliner spends flying, how
many hours of maintenance work is required?

Feel free to include 100/500/1000 hr checks.

Any answer appreciated!

Andrew C Boyd