As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2100. HYD 3 LO QTY EICAS MESSAGE NEAR TOP OF DECENT. RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. SERVICED #3 HYDRAULIC SYSTEM RESERVOIR REF E175 AMM 12-12-01-600-801-A. RAN 3A AND 3B ACMP'S AND INSPECTED SYS 3 AREA NO LEAKS FOUND. FLUID QTY REMAINS STEADY. NO FURTHER DEFECTS NOTED.RETURNED TO SERVICE. NO PARTS REPLACED.