What was found
IN CRUISE HYD 1 LO QTY SLOWLY DRAINED TO 0%. SHORTLY AFTER PSI DROPPED TO 0 DURING DESCENT. ASSOCIATED MESSAGES FOLLOWED. "TRANSFERRED TO NRWC 046-ORD-00977". C/A-PERFORMED ENGINE DRIVEN PUMP INSPECTION/CHECK IAW AMM 05-50-23. REMOVED AND REPLACED LT ENGINE DRIVEN HYDRAULIC PUMP IAW AMM 29-11-01. LK AND OPS CHECK GOOD. FOUND CRACK IN PRESSURE NACELLE CONNECTION LINE ON LOWER CONNECTION FLANGE. REMOVED AND REPLACED OF PRESSURE LINE (WHICH WAS FOUND TO BE LEAKING AT B NUT) PERFORMED AND PASSED ALL OPERATIONAL CHECKS. NO LEAKS FOUND AT THIS TIME.