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Thread: Here’s A New One “the bathrooms do not work until 16,000 feet”
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Old Feb 14, 2018 | 5:56 pm
  #29  
Jeff767
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Originally Posted by jdrtravel
Amazing. And totally false of course. I regularly try to use the lav before takeoff if I'm in F and not going to get in the way of pax boarding, because I know it could be a while before I can use again.
Actually more than likely totally true. The lavs on the Airbus flush due to differential pressure. On the ground where the pressure is equal the aircraft uses a electric vacuum pump. If that pump is inop the flight can be dispatched however the MEL specifies the toilets not be used until 16,000 feet when enough differential pressure will exist to insure they flush properly.
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