As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 7747 - IAD-RSW - DURING CRUISE, AIRCRAFT MADE A UNSCHEDULED LANDING AND DIVERTED TO SAV DUE TO NR 1 HYDRAULIC SYSTEM FAILED, QTY WENT TO ZERO. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED NR 1 HYDRAULIC PUMP, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)