would the flaperon be drooping down like shown in this photo if all power was lost inflight?
"The control surfaces on the wing and tail of the 777 are controlled by hydraulically powered, electrically signaled actuators."
see section 11.5.1 here,
http://www.davi.ws/avionics/TheAvion...ook_Cap_11.pdf
"Flaperons droop when initially commanded due to their weight, and then will float until airspeed reaches about 100 kts with at least one engine running. At that time, the ACEs will put the flaperon PCUs into normal mode, and they return to the droop position for takeoff"
777 Flaperons - PMDG 777 - The AVSIM Community
I suggest a bitten trailing edge due drooped water impact with at least one engine running or a ripped engine smashed into flaperon.
EDIT:
RAT deploys if both engines are failed and center system pressure is low. RAT hydraulically powers primary flight controls, including flaperons. So yes, if flaps setting was accordingly.