What was found
AFTER RAISING THE LANDING GEAR, THERE APPEARED TO BE A HIGHER THAN NORMAL NOISE AND VIBRATION ORIGINATING UNDER THE FLIGHT DECK BUT NO ABNORMAL INDICATIONS AT THAT TIME. AFTER ONE HOUR IN FLIGHT, CREW RECEIVED 4 AMBER XX'S ON ECAM WHEEL PAGE. AN EMERGENCY WAS DECLARED AS A PRECAUTION AND THE AIRCRAFT LANDED IN PHL WITHOUT INCIDENT. AFTER PARKING AT GATE, 'L/G SYS DISAGREE' MESSAGE ON ECAM. MAINTENANCE ACCOMPLISHED FUNCTIONAL TEST OF THE EXTENSION / RETRACTION SYSTEM AND CHECK OF NLG DOOR GAPS WITH NO PROBLEMS FOUND. VISUAL INSPECTION OF FUSELAGE, ACCESS DOORS AND PANELS OK. NO FAULTS FOUND.