What was found
EWR---CO3033, CREW REPORTED, HYDRAULIC SYSTEM NR 1 FAILED INFLIGHT QUANTITY WENT TO ZERO. AIRCRAFT AIR RETURNED TO NEWARK AND LANDED UNEVENTFULLY. MAINTENANCE FOUND A CHAFED HYDRAULIC HOSE. REMOVED AND REPLACED HYDRAULIC HOSE, SERVICED HYDRAULIC FLUID, OPS AND LEAKED CHECKED GOOD IAW EMB145 MM 29-10-03. AIRCRAFT RETURNED TO SERVICE.