As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS O2 SYSTEM LOW, POSSIBLE O2 LEAK. SERVICED TO FULL AT SJU, PLEASE INVESTIGATE. FOUND CAPT O2 MASK HOSE LEAKING. SWAPPED WITH SEC OB SEAT AND DEF SECOND OBS. SEAT.MR35114- 10 BAD MASK FROM CAPT POSITION AND INSTALLED -46 IN CAPT POS AND PUT -10 IN SECOND OBS SEAT BUT IS NOT HOOKED UP.