Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
A320 Questions Of The Day  
User currently offlineSymphonik From United States of America, joined Sep 2005, 154 posts, RR: 0
Posted (9 years 8 months 23 hours ago) and read 8978 times:

Hi all,

I just flew US (well, HP) for the first time (SJC->PHX) and on one of their A320's. I have a couple of questions about the bird itself.

1.) On both flights in and out, as the plane pulled away from the gate and throughout the taxi, then for a number of seconds after takeoff, I heard noises from the belly of the beast. It wasn't a continuous sound, rather like someone was down there with a power ratchet, going from bolt to bolt and tightening them. It was fairly constant, maybe one squeak every half-second, then gradually slowed down and faded in volume. It's really hard to type out what it sounded like. What sort of mechanical activity is going on during these portions of the taxi and takeoff?

2.) Some of the windows on the plane had little black triangles over them. They didn't seem to correspond to the location of oxygen canisters/lights/etc in the overhead bins or to exit rows (I was in the row 10 exit and I saw one maybe one or two rows ahead of me). What do these symbols mark?

Thanks for satisfying my curiousity.  Smile No complaints about the flight or the crew, everyone was very professional and there were no major hitches (though my PHX->SJC leg was delayed a bit -- the APU was offline and they had to pump air in to get the engine started up). Still, based off that experience I wouldn't have any problem flying US/HP again. The plastic cups for drinks onboard were bigger than what UA gives you.  Silly

5 replies: All unread, jump to last
User currently offlineLeskova From Germany, joined Oct 2003, 6075 posts, RR: 67
Reply 1, posted (9 years 8 months 23 hours ago) and read 8935 times:

I think you'll find answers to your questions in this thread:

RE: A320 Sound (by DBOBA Aug 1 2001 in Tech Ops)

Smile - it confuses people!
User currently offlineSymphonik From United States of America, joined Sep 2005, 154 posts, RR: 0
Reply 2, posted (9 years 8 months 22 hours ago) and read 8870 times:

Bah! I even did a search, but for "noise".  Sad

Thanks, Leskova!

Anyone about the triangles over the windows?

User currently offlineNZblue From United States of America, joined Jun 2004, 639 posts, RR: 3
Reply 3, posted (9 years 8 months 22 hours ago) and read 8843 times:

Quoting Symphonik (Reply 2):
Anyone about the triangles over the windows?

The two black triangles correspond to the location inside the cabin where the wings meet the fuselage. The area between these two points marks the overwing portion of the cabin space. One triange is placed where the front of the wing meets the fuselage, and the other is placed where the back of the wing meets the fuselage.

[Edited 2006-10-01 23:37:22]

It's an entirely different kind of flying; all together.
User currently offlineSymphonik From United States of America, joined Sep 2005, 154 posts, RR: 0
Reply 4, posted (9 years 8 months 22 hours ago) and read 8843 times:

Very cool.

Well, that was an easy thread.

Thanks, Leskova and NZblue.

User currently offlineJc2354 From United States of America, joined May 2004, 677 posts, RR: 0
Reply 5, posted (9 years 8 months 22 hours ago) and read 8807 times:

Hey Symphonic!

Yes, the sounds you heard was (basically) the hydraulic systems going through a self-test phase. If you hear it, it's a "good thing". The sound is much more noticeable on the earlier models.

You might also be onboard when they have to do a "system reset" while parked at the gate. Imagine rebooting your computer. Takes about 10-15 minutes to go through every system on the airplane , and you'll hear every noise, ding, warning, every light will go off and on, even the toilets will flush. The flight attendants can also do a cabin only system reset.

As for the black triangles, I believe they are above the windows at row 9 or 10. These window locations indicate the most optimum viewing of the wing and engine areas. Especially during or after de-icing, you might notice one of the pilots looking out of these windows.

If not now, then when?
Top Of Page
Forum Index

Reply To This Topic A320 Questions Of The Day
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
APU Exhaust (Pic Of The Day) posted Thu Jul 14 2005 15:53:56 by ANITIX87
Pirep Of The Day posted Sat Apr 16 2005 01:14:16 by CFIcraigAPA
Question About Picture Of The Day posted Sun Jan 18 2004 21:07:59 by Chi-town
Wing Development Of The A320 Replacement posted Fri Jan 23 2009 00:48:23 by Panais
Contrail From The Rear Of The A320 posted Thu Jul 29 2004 18:59:13 by Yousef727
What Is The "bump" On The Nose Of The BD-700 posted Wed Feb 1 2012 19:13:07 by csturdiv
Cathay's And BA's Evaluation Of The B748f? posted Thu Dec 1 2011 00:40:06 by windshear
Size Of The 744/748 Freighters Upper Deck posted Sat Oct 1 2011 22:41:15 by FlyboyOz
Airbus Strange Definition Of The 350-800 posted Sat Sep 17 2011 00:25:59 by ferpe
Questions about the work on DCA RWY 1..... posted Tue Jul 19 2011 11:03:23 by batboy

Sponsor Message:
Printer friendly format