Tu as raison Poncho !
Moindre mal qu'on m'aide un peu ... pfff !
Je suis allé un peu vite ... mais Pfff il y en a eu tellement today !
De plus 8 heures me paraissait un peu bizarre mais je n'ai pas approfondi !
Bien quand on se trompe, on cherche ...
Et j'ai trouvé , ce sera une inspection tous les 10 vols (De 8 heures elle)
Bon, s'il faut se rassurer, tant mieux, mesure temporaire !
Et une explication intéressante des Overspeed (Encore) induites dans les 3 Spool, suspectées dans ce cas (Une alerte overspeed aurait été transmise, selon A.net )!
Ce qui, mine de rien, restera indécelable à travers les Boroscopies ... ça je me doutais bien que c'était cosmétique !
Sur l'Australien, le premier canard qui se penche sur le PB avec semble t'il qq sources crédibles !
-------------- Trouvé sur l'Australien ! 2 Extrait dont le final ------------http://www.theaustralian.com.au/news/nation/disc-failure-almost-brought-superjumbo-down/story-e6frg6nf-1225948586541
Investigators do not yet know why the disc failed, as the superjumbo carrying 440 passengers and 26 crew climbed after leaving Changi Airport in Singapore on Thursday. But they are examining certain scenarios that could have caused the problem.
These include an oil fire in the bearing compartment, blocked cooling tubes or a bearing failure.
A less likely cause was a problem with a rectangular part at the root of the turbine blades known as the intermediate pressure (IP) turbine blade platform. An oil fire or bearing failure could cause the intermediate turbine shaft to sever, causing the IP turbine to rotate at twice the normal speed and, potentially, the disc to disintegrate.This type of so-called "overspeed" is thought to have been responsible for a previous Qantas uncontained engine failure three months ago near San Francisco on a Boeing 747
, with an RB-211 Rolls-Royce engine.In that case, however, only the blades separated and the disc remained intact.
The explosion on QF32 was the third technical problem recorded with a Rolls-Royce Trent 900 engine and an A380 jet.Two months ago, a Lufthansa superjumbo shut down one of its Trent 900 engines before landing at Frankfurt because of changes in oil pressure.
However, the plane's problems did not end after it had safely landed. Once on the ground, and before passengers could disembark, the pilots found that damage to wiring in the wing meant they were unable to shut down the No 1 engine. Firefighters doused it with foam to shut it off, adding to the overall damage cost.
The problem for Rolls-Royce and Qantas staff was that they could not be sure which of various scenarios was to blame.
They are conducting a series of inspections that would cover them all:: looking at oil monitoring for the past 50 sectors to pick up oil-feed problems; using a boroscope to check turbine blade platforms.
The Trent 900 has been the subject of two European airworthiness directives of excessive wear and engineers will see whether those problems have occurred again.
The checks will take eight hours for each engine
and are designed to give Qantas, Rolls-Royce and European-owned Airbus confidence in the engines.Officials are confident the five undamaged Qantas planes will be back in the air within 48 hours
But it is an interim solution that will clear the planes for just 10 landings and take-offs as Rolls-Royce works on the next steps.Qantas engineers do not believe that the problems identified by the European airworthiness directives, and requiring increased inspections of the engine, are related to this failure.
Nor do they think the failure is linked to the fact the engine that exploded left its last maintenance by Rolls-Royce in Frankfurt in March with a "minimum equipment list" problem on a probe that measures the speed of the low-pressure turbine.
The aircraft, which will require hefty repairs once it is released, is now in the hands of investigators led by the Australian Transport Safety Bureau.The cockpit, flight data and quick access recorders have been removed and returned to Australia, with 77 hours of flight data and the cockpit voice recorder due to be downloaded in Canberra. There is also interest in wreckage recovered on Batam.