As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MIA DUE TO HYDRAULIC QUANTITY LOSS. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED ENGINE #1 HYDRAULIC PUMP PER AMM 29-11-11 (AALA202308049161). REPLACED SYSTEM B ELECTRIC MOTOR DRIVEN PUMP AMM 29-11-21 (AALA202308044396).