As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT, LOST HYDRAULIC A-SYSTEM. ACCOMPLISHED APPROPRIATE CHECK LIST AND MANUALLY EXTENDED THE LANDING GEAR. EMERGENCY DECLARED AND AIRCRAFT RETURNED. AIRCRAFT LANDED MDT WITHOUT INCIDENT. REPLACED NR 2 ENGINE HYDRAULIC PUMP FLEX PRESSURE LINE. LEAK CHECKED NORMAL.