What was found
HYDRAULIC 1 LOW QTY APPEARED ON EICAS IN CRUISE MONITORED HYD 1 QTY & IT WENT TO ZERO. NR 1 ELEC HYD PUMP MAY HAVE RUN UP TO 5 MINUTES WITH QTY AT ZERO. HYD 1 FAIL APPEARED ON EICAS AFTER ABOUT 20 MINUTES. COMPLIED WITH AOM VOLUME 1 ABNORMAL CHECK LIST. TRANSFERRED TO NRWC 818-ORD-01391. INSPECTED NR 1 HYD MANIFOLD BYPASS PINS, BYPASS PINS DO NOT SHOW BYPASS CONDITION. PERFORMED OPERATIONS CHECK OF NR 1 EMDP IAW MM 29-10-04, OPERATIONS CHECKED GOOD. R & R NR 1 HYD PUMP IAW AMM 29-10-03, OPERATION CHECK & LEAK CHECKED GOOD.