As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED TO ORD DUE TO A SUPPLEMENTAL OXYGEN LEAK. CREW REPORTS LOSS OF ALL O2, STATUS PAGE INDICATES LESS THAN 100PSI, CREW MASKS ARE NOT INFLATING. SUPPLEMENTAL DATA UPDATE FOUND CO PILOTS O2 STOWAGE BOX AND MASK LEAKING REPLACED O2 STOWAGE AND HOSE. ALSO FOUND O2 BOTTLES PARTIALLY EMPTY. SERVICED O2 TO NORMAL LEVEL.