As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED DUE TO AN A SYSTEM HYDRAULIC QUANITY DECREASING AT 1% EVERY 6 MINUTES DOWN TO 37%. LANDED, REPLACED THE AUTOPILOT ELEVATOR HYDRAULIC PRESSURE LINE REDUCER AND O-RING IAW AMM 22-11-26. LEAK AND OPS CHECKED OK. THE AIRCRAFT WAS GROUNDED.