Rupes MkII backing plate explosion

[dlc95]

Please take a close look to RED marked areas.
It is clearly seen that there was a lot of friction and heat going between backing plate and the shroud aka Anti Spin. Yes I know it is common, but not THAT much.
So we can be assured that no 'washer mod' was installed.
A lot of friction created a lot of heat, heat created expansion, softens the material. That was probably the cause of the BP failure.
Only question is, why there was so much friction between those two ? No lubrication ? Too much torque caused BP to be in very close contact with shroud ? Improper BP mounting ? Who knows... not me.. me only knows how to shine things.

Usually the shroud will wear away, but it doesn't appear ti be the case here.

[Zubair]

I think AGPOL is referring to friction and torque as too much pressure applied, not sure.

[AGPOL]

That could be the case, Zubair. It is hard to name all possible causes for this.