"C J Campbell" wrote in message
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"Dan Luke" c172rgATbellsouthDOTnet wrote in message
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| Vacuum pumps would be deep in landfills.
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You know, a lot of pilots *like* vacuum pumps. They don't want everything
dependent on a single electrical system.

You know, a lot of pilots do not know that dual bus electrical systems with
backup alternators are better than vacuum pumps which are virtually
guaranteed to fail before TBO.