As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: HYDRAULIC B RESERVOIR LOW LEVEL AND B SYSTEM LOW PRESSURE ILLUMINATE IN CRUISE WITH ASSOCIATED LOSS OF BLUE HYDRAULIC SYSTEM; EMERGENCY DECLARED, FLIGHT LANDED WITHOUT INCIDENT AND TAXIED TO GATE UNDER ITS OWN POWER. REPLACED O-RING ON BLUE SYSTEM ACCUMULATOR SCHRADER VALVE WITH NEW IAW AMM 29-12-42, LEAK AND OPS CHECK GOOD.