As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1907 - PHL-DFW - THE FLIGHT CREW RECEIVED A SLAT FAIL EICAS MESSAGE EN ROUTE TO DFW. THE FLIGHT DIVERTED TO PIT FOR MAINTENANCE. AN EMERGENCY WAS DECLARED AND THE FLIGHT LANDED UNEVENTFULLY. MAINTENANCE REMOVED AND REPLACED THE LEFT SLAT 2/3 SKEW SENSOR.