As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX O2 LOW. RECURRED ON FLT 916-22NOV. REPLACED LEAKING PAX O2 FLOW CONTROL UNIT. LEAK FOUND ON PRESSURE LINE CONNECTED TO THERMAL COMPENSATOR AT CREW O2 BOTTLE. REPLACED VERTICAL LINE AND CONNECTING ELBOW AND SUBSEQUENT THERMAL COMPENSATOR LINE. NO FURTHER LEAKS NOTED.