As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - CREW REPORTED FLAP ASYMMETRY EICAS WARNING ON APPROACH. EMERGENCY DECLARED FLIGHT LANDED BOS LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND INBOARD FLAP DRIVE UNIT OVER TORQUE INDICATOR TRIPPED. RESET INDICATOR AND SERVICE FLAP TRANSMISSION. SYSTEM GROUND CHECK NORMAL OPERATION.