As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS INFLIGHT T1466/15APR - CREW REPORTED LOSS OF RIGHT HYDRAULIC SYSTEM QUANTITY. LANDED BOS WITHOUT INCIDENT. FOUND RIGHT INBOARD FLAP ACTUATOR AND RUDDER SHUTOFF VALVE LEAKING. REPLACED RIGHT INBOARD FLAP ACTUATOR AND RUDDER SHUTOFF VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION.