As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OXYGEN READS 1500 IN FLIGHT DECK. SERVICED OXYGEN TO FULL. EICAS READS 210 PSI LESS THAN GAUGE ON BOTTLE. RAN OUT OF TIME TO WORK. NEEDS FURTHER T-S. REPLACED PRESSURE TRANSDUCER PER MM. SERVICED O2, FOUND THAT INITIAL WRITEUP WAS NOT BOTTLE IND. BUT BAD IND AT SVC POINT INDICATOR. REPLACED INDICATOR, CHECKS OKAY.