As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED NR 1 HYDRAULIC QUANTITY LOW LEVEL INFLIGHT. AIRCRAFT DECLARED AN EMERGENCY AND DIVERTED TO EWR. EWR MAINTENANCE REMOVED AND REPLACED NR 1 ICU IAW EMB135 AMM 78-33-01. SERVICED HYDRAULICS, OPS CHECKED AND LEAK CHECKED GOOD. PERFORMED OPERATIONAL CHECK OF HYDRAULIC SYSTEM IAW EMB135 AMM 29-10-00. OPS CHECKED AND LEAK CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.