A320 Overboard Vent
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A320 Overboard Vent
What are the two overboard vents (left and right side) for on the following picture? I believe it is the overboard vent for the forward lavs but I can't find any reference to it. Could someone enlighten me. Thank you.
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Hi,
I am not familiar with A320. Can you please explain "exhaust cooling air"?
Is it related to pressurization of hydraulic reservoir?
For example the reservoir pressurization system of hydraulic system in B737 is fitted with vent through the relief valve and the drain mast. Also in b737 the Skydrol is cooled through heat exchanger in the fuel tank.
Feedback appreciated.
Exhaust of cooling air from blue and yellow elec. hydraulic pump.
Agree...
Is it related to pressurization of hydraulic reservoir?
For example the reservoir pressurization system of hydraulic system in B737 is fitted with vent through the relief valve and the drain mast. Also in b737 the Skydrol is cooled through heat exchanger in the fuel tank.
Feedback appreciated.
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On A320 contrary to 737 EMDP is electric motor of pump cooled by air flow, which is produced directly by fan mounted on motor shaft . Pump itself is cooled by hydraulic fluid like on Boeing, only without heat exchangers in fuel tanks.
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LEVEL600, thank you.
How the EDP is cooled in A320? I mean case drain of EDP.
It will be nice if you can post schematic(s) (from AMM or schematics manual) of A320 hydraulic system.
Another question if you don't mind: in case of leak in APU fuel feed line in B737, the fuel is drained overboard through shroud and drain mast.
How the fuel in A320 is drained in case of leak in APU fuel feed line ?
Feedback appreciated.
How the EDP is cooled in A320? I mean case drain of EDP.
It will be nice if you can post schematic(s) (from AMM or schematics manual) of A320 hydraulic system.
Another question if you don't mind: in case of leak in APU fuel feed line in B737, the fuel is drained overboard through shroud and drain mast.
How the fuel in A320 is drained in case of leak in APU fuel feed line ?
Feedback appreciated.
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Hi AeroTech,
There is not big differencies btwn. 737 and 320 design and principles in mentioned qestions. Engine driven pump is cooled by case drain hydraulic flow on both, but 320 do not use fuel tanks collers (heat exchangers).Hydraulic tubing is long enough to serve as cooler during normal operation. This make 320 more sensitive to posible system trip due to fluid overtemperature, which can develop quickly due to internal leak or blockage in suction line. Remeber one case , when hose ruptured on normal system pressure in less than two minutes due to overheated fluid.
APU shroud in pressure cabin is dained to drain mast located in centre of belly fairing behind main landing gear compartement, leak monitor valve(which is normal fuel tank drain valve) is located near for leak check.
There is not big differencies btwn. 737 and 320 design and principles in mentioned qestions. Engine driven pump is cooled by case drain hydraulic flow on both, but 320 do not use fuel tanks collers (heat exchangers).Hydraulic tubing is long enough to serve as cooler during normal operation. This make 320 more sensitive to posible system trip due to fluid overtemperature, which can develop quickly due to internal leak or blockage in suction line. Remeber one case , when hose ruptured on normal system pressure in less than two minutes due to overheated fluid.
APU shroud in pressure cabin is dained to drain mast located in centre of belly fairing behind main landing gear compartement, leak monitor valve(which is normal fuel tank drain valve) is located near for leak check.
Last edited by LEVEL600; 2nd Feb 2015 at 21:14.
