As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. NRT, AIR INTERRUPT, PVG-LAX. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT OVERWEIGHT. DURING CRUISE RECEIVED SPOILERS EICAS MESSAGE BUFFETING AT AIRFRAME. VISUALLY CONFIRMED SPOILER 4 AND 11 RAISED FROM WING. MAINTENANCE FOUND NR 11 SPOILER POSITION TRANSDUCER EXCITATION LINE WIRE INSULATION RESISTANCE LOW. REMOVED AND REPLACED WIRE HARNESS P/N 24654-131 IAW SWPM 20-10-11. SPOILER OPERATIONAL CHECK NORMAL AND MESSAGE CLEARED.