What was found
2 HOURS AFTER DEPARTURE, CREW REPORTED A LEAK ON THE NR 2 HYDRAULIC SYSTEM. T/S PER FIM 29-10-00-1. RAN NR 2 ENGINE PER AMM 71-00-00-51. NO LEAKS FOUND. RAN ALL 3 ENGINES FOR MIGRATION CHECK OF HYD FLUID FROM SYS 2 TO 1 AND 3. UNABLE TO FIND LEAK OR MIGRATION OF HYD FLUID ON GROUND. FOB BEFORE ENG RUN 62.6, AFTER 62.0. HYD PRESS NR 2 3020, NR 1 3060, NR 3 3020 PSI RESPECTIVELY.