As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S OXYGEN MASK WILL NOT TEST PROPERLY. MAINTENANCE RESECURED CAPTAIN'S O2 MASK DOOR AND OPS CHECKED IAW AIRBUS MAINTENANCE MANUAL 35-12-41. SDR WILL REMAIN OPEN FOR FOLLOW-UP DUE TO HISTORY: CREW O2 SERVICED ON 9/9/2011 AND BOTTLE REPLACED ON 8/26/2011. NO SUBSEQUENT FAULTS IN 30 DAYS - SDR CLOSED.