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NTSB: Interim Report WN 812 Issued  
User currently offlineBD338 From United States of America, joined Jul 2010, 702 posts, RR: 0
Posted (3 years 3 months 5 days 16 hours ago) and read 5437 times:

NTSB has issued an interim report on the skin failure on WN 812 earlier this month. Currently the prime suspect is the riveting. Suggestion that this could be a manufacturing defect (in the NYT report) Investigations are ongoing and at the moment no indication if this is a one-off or larger scale problem. Though several other 737's investigated after the incident showed similar failures in the rivet installation.

http://www.cnn.com/2011/TRAVEL/04/25...t.airlines.probe/index.html?hpt=T2

http://www.nytimes.com/2011/04/26/business/26air.html?_r=1&hp (may need a subscription)

10 replies: All unread, jump to last
 
User currently offlineKcrwflyer From United States of America, joined May 2004, 3795 posts, RR: 7
Reply 1, posted (3 years 3 months 5 days 16 hours ago) and read 5358 times:

Maybe Boeing can issue some sort of standard patch for the classics that runs along the top of the aircraft if need be?

User currently offline474218 From United States of America, joined Oct 2005, 6340 posts, RR: 9
Reply 2, posted (3 years 3 months 5 days 15 hours ago) and read 5228 times:

Quoting Kcrwflyer (Reply 1):
Maybe Boeing can issue some sort of standard patch for the classics that runs along the top of the aircraft if need be?


They already have, about 20 years ago.



User currently offlineQANTAS747-438 From United States of America, joined Jan 2001, 1925 posts, RR: 2
Reply 3, posted (3 years 3 months 5 days 15 hours ago) and read 5121 times:

Found this online: http://www.ntsb.gov/Pressrel/2011/110425.html


My posts/replies are strictly my opinion and not that of any company, organization, or Southwest Airlines.
User currently offlineokie From United States of America, joined Jul 2003, 2988 posts, RR: 3
Reply 4, posted (3 years 3 months 5 days 14 hours ago) and read 5085 times:

-- An inspection revealed gaps between the shanks of several rivets and the corresponding rivet holes for many rivets. Upon removing selected rivets, the holes in the upper and lower skin were found to be slightly offset relative to each other and many of the holes on the lower skin were not round. The NTSB did not say whether that was from wear and tear or manufacturing

Well, Duh even Okie can figure it out with that information. The real question was QC aware of this handy work.

Okie


User currently offline474218 From United States of America, joined Oct 2005, 6340 posts, RR: 9
Reply 5, posted (3 years 3 months 5 days 14 hours ago) and read 5042 times:

Quoting okie (Reply 4):
The real question was QC aware of this handy work.


I am un-familiar with Boeing's procedures, but I worked for three different aircraft manufacturers and QC never got involved with inspection of standard rivet holes. QC would only inspect rivets (shop and manufactured heads) after they were set.

The only fastener holes that were inspected by QC were holes for close tolerance fasteners (hi-locks/hi-tigues/taper locks/etc).


User currently offlinezeke From Hong Kong, joined Dec 2006, 8872 posts, RR: 75
Reply 6, posted (3 years 3 months 5 days 7 hours ago) and read 4765 times:

Quoting okie (Reply 4):
Upon removing selected rivets, the holes in the upper and lower skin were found to be slightly offset relative to each other and many of the holes on the lower skin were not round. The NTSB did not say whether that was from wear and tear or manufacturing

I wonder if this is related to allegations made late last year and discussed in this thread AlJazeera: 'investigation' On Boeing Due Wed (by mestrugo Dec 14 2010 in Civil Aviation)



We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
User currently offlineokie From United States of America, joined Jul 2003, 2988 posts, RR: 3
Reply 7, posted (3 years 3 months 5 days 2 hours ago) and read 4474 times:

Quoting zeke (Reply 6):
I wonder if this is related to allegations made late last year and discussed in this thread AlJazeera: 'investigation' On Boeing Due Wed (by mestrugo Dec 14 2010 in Civil Aviation)


Zeke, let me qualify here that this is not my area of expertise.
The AlJazeera article seems related to the fuselage section joins and not the lap joins on the skin on the fuselage.
This appears to be shotty work, there are no issues here that would not be normally dealt with during assembly with proper fitting and use of the correct size rivets which is again a normal process. I am sure that the paper work will point at least in the correct direction as to who signed off as to doing the bad work. As with all things aircraft there should be a mountain of paper work to sift through to figure out exactly who did the work incorrectly.

Okie


User currently offlinesw733 From United States of America, joined Feb 2004, 6303 posts, RR: 9
Reply 8, posted (3 years 3 months 5 days 2 hours ago) and read 4461 times:

Quoting BD338 (Thread starter):
Currently the prime suspect is the riveting.

Man, that must have taken some serious investigation work by the FAA!   

Quoting 474218 (Reply 5):
QC would only inspect rivets (shop and manufactured heads) after they were set.

I, too, have not worked with Boeing QC in any way, but I have worked with another manufacturer's QC and they were the same as you mention. Obviously I will not say the name of the company...but I want to!


User currently offlinefsnuffer From United States of America, joined Jun 2007, 249 posts, RR: 0
Reply 9, posted (3 years 3 months 4 days 21 hours ago) and read 4140 times:

Was this fusalage manufactured before or after Wichita was spun off creating Spirit?

User currently onlineyeelep From United States of America, joined Apr 2011, 649 posts, RR: 0
Reply 10, posted (3 years 3 months 4 days 20 hours ago) and read 3792 times:

Spirit AeroSystems took over Boeing Wichita in 2005.

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