As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT OXYGEN BOTTLE - LOW. PRESSURE SLOWLY DROPPING. MAY HAVE A SLOW LEAK MAINT TEXT: AIRCRAFT ARRIVED WITH CREW OXYGEN PRESS AT 270 PSI. REPLACED FIRST OFFICERS MASK ASSY THAT WAS LEAKING AND SERVICED CREW BOTTLE TO 1730 PSI. NO LEAKAGE NOTED.