As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW O2 PRESS INDICATION HAS DIFFERENCE WITH ACTUAL BOTTLE PRESS. EICAS READING IS 1590 PSI AND ACTUAL BOTTLE PRESS IS 1650 PSI. CHECKED LEAK AT O2 MASKS IN COCKPIT. NO LEAK FOUND. EICAS AND BOTTLE READINGS SHOULD BE WITHIN 100 PSI. SERVICED O2 SYSTEM NO LEAKS NOTED. ALSO DIFFERENCE NOTED IS WITHIN 100 PSI DIFFERENCE.