What was found
PHL FLT 1046 - EN ROUTE TPA TO PHL. DURING APPROACH, RECEIVED EICAS MESSAGE FOR GEAR DISAGREE NOSE GEAR DOOR, WITH NO NOSE GEAR GREEN LIGHT. THE GEAR WAS CYCLED, AND OPERATED NORMALLY ON THE SECOND ATTEMPT. MAINTENANCE REPLACED THE NOSE LANDING DOOR OPERATED SEQUENCE VALVE. OPERATIONALLY CHECKED OK. PRELIMINARY INSPECTION FOUND UNIT TO BE LEAKING FROM SEALS ON RETAINER (80) AND LEAKING INTERNALLY. TEARDOWN PROCEDURE FOUND ALL PACKING'S AND SEALS WORN OR DAMAGED. SPOOL SLEEVE ASSY HAS WEAR MARKS. REPLACE ALL DEFECTED ITEMS.