What was found
DURING FLIGHT, BLUE RESERVOIR LOW. TURNED OFF PUMP. COMPLIED WITH QRH. EMERGENCY DECLARED. REMOVED OVAL LT AND RT PYLON PANEL NR 1 ENG. FOUND CASE DRAIN LINE CRACKED OR HAS A HOLE. WILL HAVE TO REMOVE TOP PYLON PANEL & REMOVE INTERCOOLER TO GAIN ACCESS. INSTALLED NR 1 ENGINE HYD LINE TO CASE DRAIN 2 IAW AMM 29-12-69-04-01. REINSTALLED PRECOOLER WITH DUCT, LEAK CHECKED GOOD IAW AMM 36-11-15-04-01. . RAN ENG AT IDLE FOR 5 MIN IAW JRH CH 5. ALL CHECKS NORMAL.