As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE INFLIGHT RECEIVED A LOW RESERVOIR PRESSURE LIGHT. WHEN EXTENDING GEAR THE MAIN PUMP LOW PRESSURE LIGHT ILLUMINATED. TURNED ELECTRIC PUMP TO ON. IMMEDIATELY LOW LEVEL LIGHT ILLUMINATED AND GAUGE WENT TO 0. PRESSURE FLUCTUATED BUT FLAPS CAME DOWN. PRESS DROPPED WHEN ELECTRIC PUMP OFF. TIGHTENED LOOSE HYDRAULIC LINE FITTING AT RIGHT ENGINE FIREWALL AND REPLACED ENGINE DRIVEN HYDRAULIC PUMP. RAN RIGHT ENGINE 30 MINUTES. NO LEAKS.