What was found
THIS IS TO REPORT A LOSS OF NR 2 HYD SYS "PRESSURE AND QUANTITY" PRIOR TO TAKE-OFF, ACFT RETURNED TO GATE. INVESTIGATION FOUND VALVE ASY (M1-164) FOR THE 2-1 NON-REVERSIBLE MOTOR PUMP TO BE AT FAULT. REF IPC 29-12-59, FIG 1, PG 9, ITEM 340, PN 148995-1, SN 331. THE VALVE SEPARATED AT THE UNION POINT OF THE MOTOR AND VALVE RESULTING IN COMPLETE LOSS OF FLUID IN NR 2 HYD SYS. THE DISCREPANT VALVE HAS BEEN SENT FOR FAILURE ANALYSIS.