What was found
CONTINUED FROM LOG PAGE #60738125. BLEED AIR DUCT PRESSURE DURING CLIMB L63 R37 USING TAI BELOW 10K FT, L60 R40 CLIMBING THROUGH FL300 L58 R38 STABILIZED AT CRUISE FL350 L45 R38. GROUNDED - YES. PERFORMED #1 ENG BLEED AIR SYSTEM HEALTH CHECK PER T/C # NG-36WC-00001. FOUND FLEX HOSE DOWNSTREAM FROM PRE-COOLER CONTROL CONTROL VALVE TO PRSOV. LEAKING AIR, ALL OTHERS CHECK PASSED. REMOVED AND REPLACED FLEX HOSE LEAKS CHECK GOOD. ACCOMPLISHED BLEED AIR CROSSOVER OPS TEST PER B737-900 AMM 36-11-00. OPS TEST GOOD. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL. AC OK FOR SERVICE.