As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GUM - FLT 965 - AIRCRAFT LOST 'A' SYSTEM HYDRAULIC QUANTITY WHILE EN ROUTE FROM OSAKA, JAPAN TO SAIPAN, CNMI. FLIGHT WAS DIVERTED TO GUAM. MAINTENANCE FOUND NR 1 ENGINE DRIVEN HYDRAULIC PUMP FAILED. MECHANIC REMOVED AND REPLACED NR 1 ENGINE DRIVEN HYDRAULIC PUMP PER MM 29-11-31. SYSTEM OPERATIONAL AND LEAKAGE CHECK GOOD. (W)