As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDM - AFTER TAKEOFF, CREW REPORTED BLUE HYDRAULIC SYSTEM QUANTITY INDICATION FLUCTUATING. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE INSPECTED BLUE SYSTEM HYDRAULIC QUANTITY INDICATION SYSTEM. CLEANED CONNECTOR ON BLUE SYSTEM HYDRAULIC QUANTITY SENDING UNIT. QUANTITY INDICATION SYSTEM INDICATES NORMAL ON GROUND. AIRCRAFT RETURNED TO SERVICE. (X)