Re: Aircraft Toilets

From: (ExpAero)
Organization: America Online, Inc. (1-800-827-6364)
Date:         12 May 95 03:22:51 
References:   1
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Buy you girl friend dinner.  She's right and your wrong.  No commercial
airplane purposely vents toilet waste.  Blue ice is a relatively uncommon
occurrence related to inproperly closed or worn waste drain drain valves
which are used to unload (no pun intended) the waste holding tanks on the
ground.  The FAA has not and would not approve any aircraft design which
allowed toilet waste overboard during flight.  Maybe you could tell your
girlfriend you really meant the grey water from lavatory and galley sinks
which does go overboard on some models.