What was found
AIRCRAFT WAS GROUNDED: AT CRUISE ENGINE HYD PUMP 1 SHOWED A LOW PRESSURE LIGHT. HYD SYSTEM A WENT TO 0 QTY. DECESION MADE TO DIVERT TO MBJ EMERGENCY DECLARED AND AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. UPON LANDING HYD SYSTEM A IS SHOWING 18 WITH AN RF. MAINTENANCE FOUND RT OUTBD GROUND SPOILER NR 12 CRACKED AT ACTUATOR HOUSING. REPLACED NR 12 GRD SPOILER ACTUATOR IAW AMM 27-62-94.