As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, PILOT REPORT LOW HYDRAULIC QUANTITY INDICATION ON NR 1 ENGINE AND DECLARED EMERGENCY LANDING. MX FOUND NR 1 ENGINE PUMP LEAKING. REMOVED AND REPLACED NR 1 ENGINE HYD PUMP IAW AMM 29-10-03 LEAK AND OPS CHECK GOOD. SERVICED NR 1 HYD SYSTEM IAW EMB 145 AMM 12-13-01. AIRCRAFT WAS APPROVED TO RETURN FOR SERVICE.