As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GUM - FLT NR 981 - AIRCRAFT DIVERTED BACK TO GUAM DUE TO LOSS OF 'A' SYSTEM HYDRAULIC QUANTITY. MAINTENANCE DISCOVERED THAT NR 5 LEADING EDGE SLAT ACTUATOR FAILED AND LEAKS. MECHANIC REMOVED AND REPLACED NR 5 LEADING EDGE SLAT ACTUATOR ASSY, SERVICED HYDRAULIC SYSTEM AND OPERATION CHECKED SYSTEM. AIRCRAFT RETURN BACK IN SERVICE. (M)