As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO CREW OXYGEN INDICATION. SERVICED CREW O2 BOTTLE TO 1750 PSI PER MM12-15-08. PERFORMED CYLINDER CHECK PER MM35-41-03 CREW O2 SYSTEM LEAK CHECK PER MM 35-11-00, NO LEAKING FOUND. RECHECKED PRESSURE ON BOTTLE AND EICAS 12 HOURS AFTER SERVICING. BOTH READS 1750 PSI.