What was found
ACFT DEPARTED ON REPO LEG WITH ONLY CREW ON BOARD. ON CLIMBOUT NOTICED NR 2 SYS LOW PRESSURE LIGHT CAME ON FOLLOWED BY MAIN HYD LOW LEVEL LIGHT AND NR. 1 SYS LO-PRESSURE LIGHT. SEVERAL MINUTES LATER AUX LO-LEVEL LIGHT CAME ON. FLIGHT CREW RETURNED TO DEPARTURE AND DECLEARED AN EMERGENCY HAND PUMPED THE GEAR AND FLAPS DOWN AND MADE A UNEVENTFUL LANDING. ACFT WAS TOWED OFF RUNWAY. INSP AND MX WAS ACCOMPLISHED BY OMP, FOUND THAT THE NOSE GEAR RETRACTION ACTUATOR RETURNE LINE FITTING O-RING HAD RUPTURED AND BLED OUT HYDR FLUID FROM THE SYSTEM. REPAIRED ACTUATOR WITH NEW O-RING, SERVICED HYDR, ACCOMPLISHED GEAR SWING AND FLAP EXT. OPS CHECK IAW AMM. TEST FLIGHT IS TO BE ACCOMPLISHED PRIOR TO RELEASE FOR REV SERVICE. (K)