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China Southern B777 Weird Dirt.  
User currently offlinebongo From Colombia, joined Oct 2003, 1863 posts, RR: 5
Posted (3 years 11 months 2 weeks 1 day 22 hours ago) and read 17922 times:

Looking at today´s pics, I saw this China Southtern T7 on july 17:


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Photo © Xu Zheng



But just one month before (june) this was the same plane:


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Photo © Roland Bergmann-Spotterteam Graz



Two questions comes to my mind, 1. What could happened during just one month? and 2. Why all the plane is so dirty but the cabin looks like new?

tks.


MDE: First airport in the Americas visited by the A380!
23 replies: All unread, jump to last
 
User currently offlineAirportugal310 From Palau, joined Apr 2004, 3574 posts, RR: 2
Reply 1, posted (3 years 11 months 2 weeks 1 day 22 hours ago) and read 17955 times:

That plane could use a little 'Comet' or 'Ajax' applied to it. Gets the stains out!


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User currently offlineAADC10 From United States of America, joined Nov 2004, 2067 posts, RR: 0
Reply 2, posted (3 years 11 months 2 weeks 1 day 21 hours ago) and read 17729 times:

It was probably parked outside. China is one of the most polluted countries on the planet and has a lot of coal soot in the air. Either that or cigarette smoke.

User currently offlineKappel From Suriname, joined Jul 2005, 3533 posts, RR: 17
Reply 3, posted (3 years 11 months 2 weeks 1 day 20 hours ago) and read 17635 times:

But that doesn't explain why the cockpit section is much cleaner. Is there a special reason to keep that section cleaner than the rest?


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User currently offlineALTF4 From United States of America, joined Jul 2010, 1206 posts, RR: 4
Reply 4, posted (3 years 11 months 2 weeks 1 day 20 hours ago) and read 17626 times:

Quoting Kappel (Reply 3):

I would imagine, firstly, that the cockpit windows obviously need to be clean. Then you have sensors (pitot tubes, etc) that probably don't need to be dirty. So they may have a maintenance rule of just washing that whole section?

Just a though. Probably wrong.  



The above post is my opinion. Don't like it? Don't read it.
User currently offlineTomassjc From United States of America, joined Jan 2010, 839 posts, RR: 2
Reply 5, posted (3 years 11 months 2 weeks 1 day 20 hours ago) and read 17506 times:
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Quoting Kappel (Reply 3):
But that doesn't explain why the cockpit section is much cleaner. Is there a special reason to keep that section cleaner than the rest?

Several carriers just clean up the nose section, as that area is most visable to the public when the aircraft is nose up to the terminal. Don't know if that is China Southern's policy or not.



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User currently offlineSean1234 From United States of America, joined Aug 2000, 411 posts, RR: 0
Reply 6, posted (3 years 11 months 2 weeks 1 day 20 hours ago) and read 17405 times:

It looks like the front section of the fuselage was changed actually.

User currently offlineLarshjort From Denmark, joined Dec 2007, 1425 posts, RR: 0
Reply 7, posted (3 years 11 months 2 weeks 1 day 20 hours ago) and read 17356 times:

The is not dirtyer in pic two than in the first, but when you wash a small part of the aircraft which becomes white the rest looks much more dirty. In the fist picture you can see the dirt on top of the fuselage.
I have washed aircrafts I would have sworn ewas clean, but the first time the brush contacted the aricraft there was a very clear difference.

/Lars



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User currently offlineAeolus From Mexico, joined Aug 2007, 373 posts, RR: 0
Reply 8, posted (3 years 11 months 2 weeks 1 day 18 hours ago) and read 17053 times:

I knew a thread about this photo was coming.

-Aeolus



Flying under the clouds above!
User currently offlinegrimey From Ireland, joined Jun 2005, 449 posts, RR: 5
Reply 9, posted (3 years 11 months 2 weeks 1 day 18 hours ago) and read 17019 times:

Quoting Sean1234 (Reply 6):

I thought that the aircraft was in a minor crash / incident and had sections replaced but that wouldn't all happen in a month. It seems to be a fairly straight line separating clean plane from dirty plane so was the front section covered up for some reason?

You would usually notice if a new radome (nose cone) was installed onto an aircraft so this maybe the case here and China Southern decided to blend in some of the aircraft with it by just cleaning the front section.

Grimey


User currently offlineCFBFrame From United States of America, joined May 2009, 531 posts, RR: 3
Reply 10, posted (3 years 11 months 2 weeks 1 day 18 hours ago) and read 16982 times:

Both pictures show the same color change. The rear section is not as dark as the current picture, or maybe it is but the sunlight may have some effect. Can you really wash an a/c and leave such a distinctive line?

User currently offlinebongo From Colombia, joined Oct 2003, 1863 posts, RR: 5
Reply 11, posted (3 years 11 months 2 weeks 1 day 18 hours ago) and read 16953 times:

June:


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Click here for bigger photo!

Photo © Toshi Aoki - JP Spotters




April:


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Click here for bigger photo!

Photo © Guiqi2006




MDE: First airport in the Americas visited by the A380!
User currently offline7673mech From United States of America, joined Mar 2004, 707 posts, RR: 0
Reply 12, posted (3 years 11 months 2 weeks 1 day 18 hours ago) and read 16899 times:
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Quoting Sean1234 (Reply 6):
It looks like the front section of the fuselage was changed actually.

Not done often, aircraft would have had to sustain a lot of damage.

Quoting Kappel (Reply 3):
But that doesn't explain why the cockpit section is much cleaner. Is there a special reason to keep that section cleaner than the rest?

Painted Section 41 (cockpit) for aerodynamic reasons.
It had a lot of rivet rash.


User currently offlineLarshjort From Denmark, joined Dec 2007, 1425 posts, RR: 0
Reply 13, posted (3 years 11 months 2 weeks 1 day 17 hours ago) and read 16663 times:

Quoting CFBFrame (Reply 10):
Can you really wash an a/c and leave such a distinctive line?

I'll upload a picture in about a week to show you.

/Lars



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User currently offlineTrnsWrld From United States of America, joined May 1999, 917 posts, RR: 0
Reply 14, posted (3 years 11 months 2 weeks 1 day 16 hours ago) and read 16255 times:

Talk about digusting air quality over there in China.

User currently offlinejetplaner From Canada, joined Mar 2008, 158 posts, RR: 0
Reply 15, posted (3 years 11 months 2 weeks 1 day 16 hours ago) and read 16151 times:

Quoting 7673mech (Reply 12):
Painted Section 41 (cockpit) for aerodynamic reasons.
It had a lot of rivet rash.

What is rivet rash? And wouldn't they wash the aircraft first before painting a section of it, especially with visible dirt on the fuselage?

-Jetplaner


User currently offlineZANL188 From United States of America, joined Oct 2006, 3500 posts, RR: 0
Reply 16, posted (3 years 11 months 2 weeks 1 day 16 hours ago) and read 16040 times:
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Quoting 7673mech (Reply 12):
Painted Section 41 (cockpit) for aerodynamic reasons.
It had a lot of rivet rash.

Or maybe it was cleaned for a structural inspection?



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User currently offlineblobusus From United States of America, joined Aug 2009, 35 posts, RR: 0
Reply 17, posted (3 years 11 months 2 weeks 1 day 15 hours ago) and read 14530 times:

It reminds me of the photo of the VC-25 during the Olympic visit - the only time I've ever seen it less than spotless. Must be a lot of crud in the air over there.

http://www.airliners.net/photo/USA--...oeing-VC-25A-(747-2G4B)/1389203/L/

[Edited 2010-08-12 16:16:35]

User currently offlinephotoshooter From Belgium, joined Feb 2010, 454 posts, RR: 20
Reply 18, posted (3 years 11 months 2 weeks 1 day 15 hours ago) and read 14530 times:
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maybe they ran out of time during the normal cleaning.


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User currently offlinenjxc500 From United States of America, joined Dec 2007, 240 posts, RR: 0
Reply 19, posted (3 years 11 months 2 weeks 1 day 14 hours ago) and read 14295 times:

Quoting jetplaner (Reply 15):
What is rivet rash?

See this Boeing Publication....

http://www.boeingsuppliers.com/envir...tal/TechNotes/TechNotes2003-08.pdf


User currently offline7673mech From United States of America, joined Mar 2004, 707 posts, RR: 0
Reply 20, posted (3 years 11 months 2 weeks 1 day 12 hours ago) and read 12381 times:
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You would be surprised how much paint fades when an aircraft is in service.
Throw pollutants into the mix and the difference in paint color is astonishing, especially after 3 or 4 years.
A few years back I know one carrier had to paint about 5 planes that were only 18 months old and from ramp you could clearly see it, not so much from the terminal.

Rivet rash is when the paint peels off of the heads of rivets.
The 57's, 67's and 77's had some warranty repaints (section 41 only), not sure about 747's.

njxc500 posted an excellent link explaining it.


User currently offlineWNwatcher From United States of America, joined Mar 2010, 275 posts, RR: 0
Reply 21, posted (3 years 11 months 2 weeks 1 day 10 hours ago) and read 11269 times:

Quoting grimey (Reply 9):
You would usually notice if a new radome (nose cone) was installed onto an aircraft so this maybe the case here and China Southern decided to blend in some of the aircraft with it by just cleaning the front section.

If you look at the large version of the photo, the cheat line is off slightly and doesn't quite line up.



meepmeep
User currently offlineNavigator From Sweden, joined Jul 2001, 1172 posts, RR: 14
Reply 22, posted (3 years 11 months 2 weeks 1 day 4 hours ago) and read 8539 times:

Quoting grimey (Reply 9):
You would usually notice if a new radome (nose cone) was installed onto an aircraft so this maybe the case here and China Southern decided to blend in some of the aircraft with it by just cleaning the front section.

A change of a section seems highly unlikely for a number of reasons...

However the plane may have been painted in the nose section and waiting to get a fresh coat on the rest of the plane too. But in the meantime until they get time in the paintshop it is flying.
It seems the plane has been treated with something that makes it look dirty prior to painting. It is just that only the nose section has gotten the paint.



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User currently onlineburnsie28 From United States of America, joined Aug 2004, 7531 posts, RR: 8
Reply 23, posted (3 years 11 months 2 weeks 23 hours ago) and read 4756 times:

Quoting Navigator (Reply 22):
It is just that only the nose section has gotten the paint.

Looking at it, that wouldn't be the case because in order to paint the entire area around it needs to be cleaned, also the colors match perfectly with the other sections which have likely faded and you would be able to tell the difference. The interested part is that the dirt starts right around an area where the sections join, it could be that from flying this sections more or less was cleaned off.

Quoting WNwatcher (Reply 21):
If you look at the large version of the photo, the cheat line is off slightly and doesn't quite line up.

They line up, its just the dark area from the two sections

Quoting blobusus (Reply 17):
It reminds me of the photo of the VC-25 during the Olympic visit - the only time I've ever seen it less than spotless. Must be a lot of crud in the air over there.

Right and we all know that Air Force One and Two are both kept very very clean and in prestine shape. It's often polished and washed everytime she returns to Andrews.



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