lke2fly
Topic Author
Posts: 52
Joined: Tue May 03, 2011 3:47 am

A380 Engines

Thu Jan 31, 2013 6:56 am

I don't know if I missed out on the information, but did Rolls Royce do all the engine repairs on all a380's so another Qantas mishap doesn't occur?
 
User avatar
Stitch
Posts: 22953
Joined: Wed Jul 06, 2005 4:26 am

RE: A380 Engines

Thu Jan 31, 2013 3:33 pm

Quoting lke2fly (Thread starter):
I don't know if I missed out on the information, but did Rolls Royce do all the engine repairs on all a380's so another Qantas mishap doesn't occur?

They redesigned and replaced the failed part, so that specific failure mode should now be eliminated.
 
lke2fly
Topic Author
Posts: 52
Joined: Tue May 03, 2011 3:47 am

RE: A380 Engines

Thu Jan 31, 2013 7:46 pm

Thanks Stitch, so I'm guessing that all a380s in service with other airlines were also take care of.
 
User avatar
Stitch
Posts: 22953
Joined: Wed Jul 06, 2005 4:26 am

RE: A380 Engines

Thu Jan 31, 2013 9:26 pm

Quoting lke2fly (Reply 2):
Thanks Stitch, so I'm guessing that all a380s in service with other airlines were also take care of.

Yes, they all should have been modified under whatever Airworthiness Directive was issued after QF31.
 
ferpe
Posts: 2651
Joined: Tue Nov 30, 2010 7:44 am

RE: A380 Engines

Thu Jan 31, 2013 9:59 pm

The failure in the QF31 case was from a mis-manufactured part, a counter bore was not center aligned and caused to thin material in an oilpipe feeding into the rear bearing for the IP shaft to fatigue and break. The oil that sprayed out caught fire and weakened the highly loaded IP disc, it came loose from the shaft, over-speeded and disintegrated. So the primary action was to find all oil pipes that were not correctly made and change them, this was done with a boroscope action on all engines.

At the same time it became clear that there were 3 different revisions of the rear IP bearing structure, Quantas has an extra high revving version of the engine for more thrust (for their SYD-LAX legs). This apparently loads this bearing structure so that they need the C revision to have acceptable time on wing. As QF and many others are on power by the hour RR can swap engines so that QF gets the sturdier ones while others can do with e.g. A or B rev ones.
Non French in France

Who is online

Users browsing this forum: No registered users and 12 guests