Qantas flies eight whales, none at this point with less than "C" Mod engines (972)
Of Thirty two total engines on wing, two have experienced this oil feed issue in the last two weeks. Assuming the "Working Loose" problem, what Ben doesn't say is that this most recent incident was also likely losing Oil necessitating the roll back.
Mathematically, there is a .33 chance in one hundred that two engines will behave this way
on the same flight. It is actually worse than that, since the problem is identical, and rollback for any reason is less likely than losing two when a demonstrated fault has repeated.
Call it one in one hundred.
Thankfully no less an authority than Rolls Royce itself has stated its engines are perfectly safe.
Whew!! No worries, then!!
