can it fly either ATL-PEK or PVG if they get the final China slot?
Is it safe to assume that the RR-Trent 892 provides the B772 with the longest range?
No, it isn't.
What engines do other major B777 carriers have?
Basic choices are:
GE90-115B and its deration (GE90-110B1)
GE90-94B and its derations (GE90-90B) and progenitors (GE90-92B, -85B, etc)
Trent892 and its derations (most carriers op it at 90K lb/ft, not 92K... also 884B) and progenitors (Trent875, 877, 884)
PW4098 (sh!tty engine that PW
basically had to give away to the only airline who ops it)
PW4084 and its progenitors (PW4074, 4077)
: Trent884B, Trent892, and soon the GE90-115B
: GE90-76B, GE90-85B, GE90-90B, Trent895-17
: PW4077, PW4090, GE90-115B