What was found
FLIGHT CREW RECEIVED A WING ANTI-ICE MESSAGE WHILE IN DESCENT, THEN DECLARED EMERGENCY INTO PHL. AC LANDED SAFELY, NO INCIDENT. MAINTENANCE WAS CALLED OUT TO AC TO TROUBLESHOOT ISSUE. MAINTENANCE FOUND A BAD SLAT TO SLAT CONNECTION HOSE ON RT SLATS 2 AND 3, REMOVED AND REPLACED PER EMB AMM, PERFORMED OPERATIONAL CHECK PER EMB AMM. AC RETURNED TO SERVICE.