What was found
SYSTEM A ENGINE DRIVEN PUMP LOW PRESSURE LIGHT CLIMBING THROUGH 30,000 FT. ACCOMPLISHED QFR PROCEDURE. CREW DECLARED EMERGENCY AS HYD QTY CONTINUED TO DROP. RETURNED TO DEPARTURE. ACFT GROUNDED. REMOVED A SYSTEM ENGINE DRIVEN PUMP REF AMM 29-11-000-801-001, REMOVED ENG DRIVEN PUMP CASE DRAIN FILTER ELEMENT, NO CONTAMINATION NOTED, INSTALLED FILTER ELEMENT REF AMM 29-11-51, INSTALLED A SYS ENGINE DRIVEN PUMP REF AMM 29-11-11-400-801-001, OPS CHECK AND LEAK CHECK GOOD.