As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DECLARED PAN PAN INTO MIA DUE TO HYDRAULIC SYSTEM B LOW PRESSURE LIGHT. FLIGHT LANDED AND TAXIED TO GATE WITHOUT INCIDENT. SYSTEM B ELECTRIC HYDRAULIC PUMP LOW PRESSURE LIGHT, ILLUMINATED. SYSTEM B ELECTRIC HYDRAULIC PUMP REPLACED.