As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE SFO-FRA, CREW REPORT CREW OXYGEN SHOWING 450 PSI. SHOULD READ 1250 PSI. DIVERTED TO BGR. *S/D* OXYGEN WAS SERVICED PER AMM 12-15-08. CHECKED COCKPIT OXYGEN MASK, NO LEAKS FOUND. ENGINEER ASSIGNED TROUBLESHOOTING TASK TO ACCOMPLISH FIM 35-11, TASK 802 AND TO CHECK BLEED VALVE FOR LEAKS. CALLOUT WAS ACCOMPLISHED AND NO LEAKS WERE FOUND. SYSTEM SERVICED WITH NO FURTHER REPORTS.