As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH LOW PRESSURE LIGHTS FOR 'A' SYSTEM HYDRAULIC PUMPS CAME ON FOLLOWED BY LOW PRESSURE LIGHT FOR NUMBER ONE 'B' PUMP AND FEEL DIFFERENTIAL PRESSURE LIGHT. FOUND OBSTRUCTION IN ENGINE FLEX LINE CAUSING LOW PRESSURE INDICATION. REPLACED RESERVOIR AIR PRESSURE REGULATOR AND CHECK VALVE AS PRECAUTIONARY.