Actually, AF have plenty of A342 and A343 both of which have >30% higher maximum payload range than the 777-300ER. (Reply17)
Huh? I'm sure this must be news to AF and the rest of the aviation world. The A342/3 payload range capability can't even match the 772ER much less the 773ER. Are you thinking of the 773?
On the main topic though.
I believe the 773ER has recently completed 1.3 million engine flight hours with three IFSD of GE90-115B's.
http://www.alleventsgroup.com/archiv...yb3VyIChHRSBBd
Doing the math gives an IFSD rate of 2.3x10-6.
Required IFSD rate for 180 min. ETOPS is .02X10-3.
The GE90-115B failure rate could be 10 times higher without jeopardizing its 180 min ETOPS capability.