As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT HYD QTY DROPPED FROM 10 QTS TO 4 QTS IN FLT WHEN RT SYSTEM WAS TURNED OFF QTY ROSE TO 15 WHEN RT SYS TURNED ON FOR LANDING SYS QTY DROPPED TO 1 QTY PRESSURE REMAINED GOOD. LEAK FROM RIGHT SYSTEM PRESSURE FILTER MODULE REDUCER - REPLACED O-RING.