Tag Archives: a380

Not from me, on Qantas and Rolls-Royce

From an occasional correspondent who knows about this sort of thing:

RR engines do not like oil in the wrong places because it may stop the air-cooled turbine blades being cooled
All RR “B” checks are supposed to include a look for oil in the wrong places
Qantas seem less good at finding it than Singapore Airlines or Lufthansa
There is a problem with wear on some A380 engine components which is why the need for checks was highlighted in August
Qantas are more likely to have a problem because they operate their A380’s with higher thrust ratings than SQ or LH
The Trent 900 is the first RR engine to introduce contra-rotation, where one of its three shafts runs in the opposite direction to the other two
That massively increases the entertainment value of, say, bits of one broken turbine meeting a turbine rotating in the opposite direction
Since Qantas engineers have now looked at all their T900 engines jointly with RR engineers they have found two more with oil where oil shouldn’t be
Which begs the question why they didn’t find it before…

His words, not mine. Although, much as I respect Ben Sandilands, this is the most convincing analysis I’ve read. Apart from the misuse of “begs the question”, which is unforgiveable.