As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED SLAT FAIL ON APPROACH INTO PHL, CREW DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LT AND RT SLAT 3/4 HARNESSES AND BOTH LT O/B SKEW SENSORS PER EMB AMM. A/C WAS THEN RETURNED TO SERVICE.