As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - FLT 0217 - AC 7BB AA PIR.11 'ALERT' SYS 3510 MDIS, 17SEP/LHR T-0217. EMPL CREW. CREW OXYGEN SYSTEM LEAKS ABOUT 10 PSI EVERY 10 MINUTES. REPLACED CREW OXYGEN BOTTLE ACCOMPANIED BY OPS CHECK OF CREW OXYGEN MASKS, ALL OKAY. ACCOMPLISHED LEAK CHECK OF OXYGEN BOTTLE AND VISIBLE PLUMBING. ALL OK. OXYGEN PRESSURE STEADY AT 1,880 PSI FOR 30 MINUTES. (X)