August 2, 201114 yr Found this on the Boeing site. Is it the outflow valve for pressurization or what? A Walker
August 2, 201114 yr This is where all the "stuff" flushed down the toilet is being released - in the air of course... to make things more colorfull. Tomasz Fiszer -- IFIYGD
August 2, 201114 yr Author Just found it on that 737 site in the other link. Its the outflow valve. A Walker
August 2, 201114 yr Found this on the Boeing site. Is it the outflow valve for pressurization or what? This is where all the "stuff" flushed down the toilet is being released - in the air of course... to make things more colorfull. So, technically the first comment was correct. It did involve an "outflow valve for pressurization" Ron Priever
August 3, 201114 yr Commercial Member It's the main outflow valve:Cabin pressurization is controlled during all phases of airplane operation by the cabin pressure control system. The cabin pressure control system includes two identical automatic controllers available by selecting AUTO or ALTN and a manual (MAN) pilot–controlled mode.The system uses bleed air supplied to and distributed by the air conditioning system. Pressurization and ventilation are controlled by modulating the outflow valve and the overboard exhaust valve. Vin Scimone Precision Manuals Development Group www.precisionmanuals.com
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