As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SLAT FAIL MSG DURING CRUISE, DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT INTO PHL. MAINTENANCE TROUBLESHOT AND FOUND THE RT FLAP/SLAT PSU TO BE AT FAULT. REMOVED AND REPLACED THE RT FLAP/SLAT PSU PER EMB AMM. THE A/C WAS RELEASED BACK INTO SERVICE.