It would seem that the Boeing Ops Center would know exactly what was wrong with the aircraft.
Aircraft Health Management for 787
"This communications center tells Boeing and the airline that owns the jet what's going on with every system inside the planes. Each plane is sending up to 5,000 indications about itself at any time, including the oil level in the Auxiliary Power Unit, the status of the heater that keeps the pilot's cockpit windows free of ice and the health of the recently modified lithium-ion batteries. If needed, the team can call up over 140,000 sources of data on each jet."