As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OMA - INFLIGHT ORD-DEN. CREW REPORTED O2 BOTTLE PRESSURE LOW. LANDED OMA WITHOUT INCIDENT. REPLACED CREW O2 BOTTLE PER MAINTENANCE MANUAL. PERFORMED SELF TEST OF FIRST OFFICER’S REGULATOR, NO DEFECTS NOTED. SYSTEM GROUND CHECK NORMAL OPERATION.