As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW OXYGEN SYSTEM LOW. RECORD PRESSURE PRIOR TO SERVICING. CREW COMMENTS: O2 PSI SLOWLY BLEEDING DOWN. NEEDS TO BE SERVICED. SUSPECT SLOW LEAK. APPLIED LEAK DETECTOR FLUID TO FITTINGS & LINES AT O2 BOTTLE, NO LEAKS FOUND. SAME SEARCH ON FIRST OFFICER'S CREW O2 MASK YIELDED LEAK AT HOSE FITTING ON FRONT OF MASK. REPLACED MASK. OXYGEN SERVICED TO FULL AT 1770 PSI. NO LEAKS NOTED.