As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DE/FCNT-DUE TO FLAP ISLN VALVE EICAS MESSAGE. REPLACED RELAY K10104 IN P33. FLAP BYPASS VALVBE ELEC CONNECTOR FOUND TO BE FULL OF HYD FLUID AND OTHER DEBRIS. CLEANED AND RECONNECTED. SLAT DRIVE MOTOR CONNECTOR FOUND LOOSE. INSPECTED AND REINSTALLED. OPS CHECK GOOD. (LP 8708847 - AIRCRAFT WAS GROUNDED)