As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T1468/02APR - RIGHT HYDRAULIC QUANTITY DECREASED TO ZERO DURING FLIGHT. REPORT OF ODOR OR SMOKE IN CABIN. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. FOUND RUDDER HYDRAULIC SHUTOFF VALVE BODY CRACKED AND LEAKING. REPLACED RUDDER HYDRAULIC SHUTOFF VALVE AND REPLACED APU DUE TO SKYDROL INGESTION. SYSTEM GROUND CHECKED NORMAL OPERATION.