As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 663, EN-ROUTE AT COAST OUT, CREW O2 WAS FOUND TO HAVE DROPPED TO 80PSI. THE FLIGHT DECLARED AN EMER & DESCENDED TO 10,000 FEET. THE FLIGHT DIVERTED & LANDED WITHOUT FURTHER INCIDENT. REPLACED THE CREW OXYGEN BOTTLE. OPERATIONALLY & LEAK CHECKS OK.