As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT OXY MASK BLEEDS OFF CREW OXY PRESSURE. SWAP WITH 2ND OBS MASK & DF 2ND OBS SEAT. COMPLIED WITH MEL, ENTIRE CAPT OXYGEN MASK BOX SWAPPED WITH 2ND OBS PER MM. SERVICED O2 TO 1840 PSI DEN. O2 AT 1360 INBOUND. RPLD 2ND OBS MASK REF MM.