Qantas A380 uncontained #2 engine failure

[bearfoil]

Of course this is a guess, but by the apparent radius of the artifact that created the "heat shadow" on the disc's face, perhaps it could be a portion of the splined surface of the shaft? It does resemble an impellor related to an oil pump, but the radius appears too large. It may be a part of the bearing race, (another guess).What is of note also are the craters, the pocks left by small bits.The acceleration responsible for such small shrapnel to have left those signatures must have been gargantuan.

Qantas is alone at the fair. Something indigenous to the DEP equipped 900's may be responsible? 2k lbs of thrust doesn't seem much percentage wise. This DEP thingy, is it foolproof? If the engine was over commanded, could it have been making far more thrust than 72? On throttle down, can the Fan overwhelm the IP? Could this cause the Wheel to "migrate aftward?" There is AoA in climb to consider? does the inlet air spiral (especially in over performing settings?) Can a too high command even happen.? Just musing. Can the DEP be "re-rigged?" The engine is "certified" to 80k, is there a little extra oomph to be gained (ad hoc) by goofing this plug? The parties each want the other to shoulder all responsibility, it isn't black and white, at least not too often.

edit. on reading the link above, it appears the lines are being drawn on the field of battle. Rolls Royce has answered Joyce (Royce v. Joyce?). The 1000 was over thrusted on test. Both failures involved the IPT, yet Rolls is saying the engine disintegrations are unrelated. Both had to do with oil issues. The migrating fan resulted from? Joyce is claiming the "oil where it mustn't be" is the culprit (at least in the Press). The 777's T700's (038) crapped out at full throttle, though the fuel supposedly froze and caused the loss of thrust. Fuel lines and oil lines, and their attendant plumbing? AoA 038, and Qantas at full in climb, is air management an issue in combination with plumbing glitches. An 112 inch Fan (and all other wheels) make an enormous din, along with the thrust. The mechanical dependence upon balance and thrust reactions is extreme. Brand new oil lines rupturing, one hopes it isn't the wrong spec on the plumbing.

bear