As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS DURING CLIMBOUT AT MKE, NOTICED RIGHT HYDRAULIC QUANTITY DECREASING AND RETURNED TO MKE. MAINTENANCE FOUND O-RING ON NOSE STEERING ACTUATOR LEAKING. REPLACED O-RING, CYCLED SEVERAL TIMES AND NO LEAKS NOTED. OPS CHECK GOOD, RETURNED AIRCRAFT TO SERVICE.