QANTAS A380 Uncontained failure.

[WojtekSz]

Derg:
have you invented a new Deduction Generator ?
Looks like too much of a guesswork at play, why don't we stick to facts pls

1. Fan - carbon fibre is lighter but more expensive. Companies do gamble with new technologies sometimes.
2. Balance - lighter does not easier to balance - depends on quality of machining, and the rotational speed also and this is low speed ...
3. Oil Temp: are you sure we can use the data from such article to make such bold statement about 10% engines not passing final tests? Any wise manager would make a fortune by properly implementing 6sigma methodology there to squeeze it down to 1% in 24 months. High oil temp may be caused by vibration but these are caused by 3 shaft design principle. It is a strategic gamble by RR to pursue this road.
4. Manufacturing tolerances: OK, see point 3.
5. Vibration detection: usually small vibrations are more dificult to detect
6. Vibration allowance: as far as i understand, one cannot use the maintenance stand to measure vibrations during engine operation
7. 3 spool design: it has own advantages thou, simply something was not ready in Trent 900 version when started selling it
8. Oil feed pipe: ever heard scape pipe? (sometimes referred to as scapegoat)
9. Communication failure: another reason why kaizen principles should be implemented in RR.
10. Management Character: You have assumed sth based on an univ paper so why shouldn't they? Roller bearings and managers must have tough b..s. Univ papers are seldom treated as robust. At least here... And MIT is from USA, right? For scientists there are two models: coach them or buy them - if you want to get govt support better coach them... Recently Barcelona home grown team plays much better team than Real Galacticostly stars (search for Spanish soccer results) Selecting new suppliers in tough times is usually caused by search for economic solutions. Takes time to gain experience.
11. The failure to be able to shut down the #1 engine on the stricken Qantas A388 was unforseen: a big lesson that i am sure has been properly thought over.I do not know the results but from the discassion over here it is not a simple problem.