As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, COMPLETE LOSS OF SYSTEM A HYDRAULIC SYSTEM. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE WITHOUT FURTHER INCIDENT. ACCOMPLISHED HYDRAULIC SYSTEM A FLUSH AND REPLACED LEFT ENGINE HYDRAULIC PUMP IAW AMM 29-11-00. OPS CHECKED GOOD. THE AIRCRAFT WAS GROUNDED.