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 REPORTS OXY PRESSURE IS DOWN TO 940 PSI. ORDMM REPORTS THAT 20 MINUTES AFTER SERVICING OXYGEN, LOST 40 PSI. AT 1332 HOURS O2 PRESSURE IS 1770 PSI AFTER SERVICING O2 AND COMPLETION OF R & R OF CAPT O2 MASK. ACCOMPLISHED, VERIFIED OXYGEN PRESSURE AT 1770 PS1 FOR 1 HOUR ON GATE, WITH NO LEAK DOWN AFTER CAPTS MASK REPLACEMENT.