LZ129 From Germany, joined Feb 2013, 81 posts, RR: 0 Posted (10 months 3 weeks 1 day 8 hours ago) and read 2158 times:
I tried to find out if this question was asked before and I did find something in the archives, but since the picture linked in that thread was no longer available, I couldn't really tell if the question back then was actually the same as the one I have.
beiaard From United States of America, joined May 2011, 45 posts, RR: 0
Reply 1, posted (10 months 3 weeks 21 hours ago) and read 2138 times:
Seemed to me that it must be the APU intake, but after reading this thread: APU Inlet (by A346Dude Mar 24 2008 in Tech Ops)
I saw that in reply 4, Planenutok explains that, "On the CRJ 700 that i work on the apu has a door on the right side below the vertical stab as shown in this photo. The inlet at the base of the vertical stab is the pack inlet."
Tolling the bells of the Swamp to delight the Common Spirit
Alias1024 From United States of America, joined Oct 2004, 2720 posts, RR: 2
Reply 3, posted (10 months 3 weeks 21 hours ago) and read 2121 times:
It's the Ram Air Intake. Air is drawn in through the intake and passes across the precooler and dual air-to-air heat exchangers of each pack before being discharged through exhaust vents. There's also a shutoff valve that when opened allows the ram air to be used for instrument display cooling along with ventilation of the flight deck and cabin. This would only be used in abnormal operations. Ram air is also used for hydraulic system cooling for two of the three hydraulic systems.
[Edited 2013-06-05 14:08:28]
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